CN105186268B - Throat's gaseous film control nozzle component for anti-yaw damper gain generator - Google Patents

Abstract

The invention discloses a kind of throat's gaseous film control nozzle component for anti-yaw damper gain generator, including some jet pipe blades, each piece of jet pipe blade includes shrinking leading portion, throat section and expansion segment, venturi is formed between the throat section of adjacent two jet pipe blades, nozzle component includes shrinking leading portion body, throat section body and expansion segment body, shrink leading portion body with throat section body to position end surfaces, shrink leading portion body and/or throat section body is provided with the air film slit relative to location sunken end face, air film slit is shrinking between leading portion and throat section and is connecting with venturi. nozzle component effectively can be protected by the cooling air film of the present invention in long-play, realize burning and drive chemical laser long-play, thoroughly solve burning and drive chemical laser nozzle throat section, especially the ablation problem that venturi long-play exists, it is greatly improved gain generator life-span and the operational reliability of chemical laser, it is achieved rift-free hot spot of stablizing exports.

Description

Throat's gaseous film control nozzle component for anti-yaw damper gain generator

Technical field

The present invention relates to chemical laser technical field, particularly relate to a kind of throat's gaseous film control nozzle component for anti-yaw damper gain generator.

Background technology

Existing burning drives supersonic speed fluoride deuterium/hydrogen fluoride chemical laser to utilize fluorine atom and deuterium/hydrogen to carry out pumping reaction and produces population inversion and then the fluoride deuterium/fluohydric acid gas laser with important use of lasing output center wavelength 3.8/2.7 micron. As it is shown in figure 1, such chemical laser is mainly included chamber mirror 21 and 22 by gain generator 10, optical resonator 20() and the parts such as auxiliary exhaust system 30 form. Wherein, gain generator 10 includes the ejector filler 1, combustor 2 and the nozzle component 3 that are sequentially connected with along air current flow direction, gain generator 10 herein has two big major functions: (1) ejector filler 1 sprays into main fuel (gaseous mixture such as ethylene or deuterium and helium) and oxidant (gaseous mixture such as Nitrogen trifluoride Yu helium) gas mixed combustion in combustor 2, heat release dissociate excessive Nitrogen trifluoride produce containing fluorine atom high-temperature hot balance mixing gas, namely thermal dissociation fluorochemical produce fluorine atom; (2) it is that supersonic gas sprays in optical resonator 20 containing fluorine atom high-temperature gas mixture body through nozzle component 3 accelerated expansion, secondary fuel deuterium/hydrogen that the fluorine atom sprayed into provides with nozzle component 3 quickly mixes and occurs pumping to react, and produces the high velocity air gain media of population inversion.

Above-mentioned gain generator nozzle component 3 is one of vital parts in chemical laser, and its duty decides the output performance of laser instrument. Existing the most frequently used nozzle component 3 is HYLTE hypersonic low temperature nozzle array, jet pipe upstream connects the high temperature in combustor 2, high pressure, Strong oxdiative fluorine mixed gas, downstream connect spray in optical resonator 20 low temperature, low pressure, ultrasonic oxidizer flow. On HYLTE nozzle component 3, array arranges some pieces of jet pipe blades, as shown in Figure 2, each piece of jet pipe blade includes contraction section 9, throat section 5 and expansion segment 6 successively, it is provided with venturi 7 between adjacent throat section 5, along airflow direction, form the contraction passage shrinking air-flow between the contraction section of adjacent two jet pipe blades, between adjacent two expansion segments 6, form the expanding channel of expansion air-flow, shrink and connected by venturi 7 between passage and expanding channel. This venturi 7 is For Transonic Flows region, and thermograde is big, heat flow density is high, and venturi 7 is highly generally no greater than 0.2mm. In order to nozzle throat 7 keeps size constancy in running, the HYLTE jet pipe blade generally high-temperature material made is holed and takes water-cooled measure, but owing to jet pipe blade and venturi 7 size are little, even if taking water-cooled measure, in long-play process, the size of venturi 7 still slowly diminishes, exit area ratio tapers into, outlet air flow velocity is slowly varying, pumping reaction zone, lasing zone position and length are slowly varying in time, and then when making to go out for a long time light, hot spot exists trace drift and affects laser application. It addition, in laser instrument long-play process, there is nozzle throat 7 trace ablation and build up so that gain generator lifetime. Therefore, the problem that high-temperature material and water-cooled measure can not thoroughly solve to there is Parameters variation and ablation in gain generator nozzle throat 7 ablation and running is adopted. In addition, when gain generator Non-water-cooled, its nozzle throat 7 throat area diminishes rapidly owing to being heated, from gas critical flow flow formula, gain generator combustor total pressure will quickly raise, the visible document of typical result of the test [SBL] describes, and under the souring of supersonic speed high temperature gas flow, nozzle throat 7 is easy to ablated. Once venturi 7 is ablated, gain generator will entirety be scrapped. These problems show especially prominent in high pitched tune pressure operative component.

Nozzle throat 7 ablation problem is always up puzzlement burning and drives one of chemical laser reliability and the crucial problem in life-span, and the spot drift that its venturi 7 Parameters variation brings is also required to extras in actual applications to realize beamstability. for this, TRW Ltd. (US) One Space Park, Redondo Beach CA 90278 U.S.A. of the U.S. is considered as simple helium slit gaseous film control concept the earliest to solve the ablation difficult problem that chemical laser nozzle throat 7 high heat flux brings, this university of U.S. Illinois once carried out overtesting research for this idea on electric excitation chemical laser applicator platform, as shown in Figure 3, its improvement relative to Fig. 2 is in that, throat it is provided with for air cavity 52 in throat section 5, the front end of throat section 5 is provided with contraction leading portion 4, this dual-side shrinking leading portion 4 is symmetrically extended the flow deflector 42 that thickness is about 0.5mm, shrink leading portion 4, the long and narrow air film slit 8 that spacing is about 0.127mm it is provided with between flow deflector 42 and throat section 5, air film slit 8 connects for air cavity 52 with throat. during operation, room temperature helium enters from throat for air cavity 52, enters venturi 7 by symmetrical air film slit 8 along wall spray and forms cooling air film, and wall near venturi 7 and high-temperature fuel gas are separated and avoid ablation by cooling air film.But there is Railway Project in above-mentioned throat anti-yaw damper method: (1) air film is formed by the long and narrow air film slit 8 being used for controlling each blade air film flow and uniformity thereof, therefore air film slit 8 upstream and downstream to ensure certain pressure reduction, and air film slit 8 size range and tolerance have strict restriction. Owing to processing and operation temperature distortion can bring error, this error can cause that large scale gain generator cannot ensure the dimensional uniformity of air film slit 8, namely cannot realizing each blade air film uniformity on height and optical axis direction, the throat on whole blades cannot effectively be protected by simple slit air film; (2) carefully thin flow deflector 42 thermal capacity is little, and its one side contacts high-temperature fuel gas, another side contact room temperature helium, can heat up gradually too high and ablated in long-play process. If thickening flow deflector 42, then can produce strengthening flow-disturbing bottom it, it is impossible to formed in nozzle throat section 5 and be effectively protected air film; (3) shrink leading portion 4 and cooling protection is not provided, air film slit 8 change in size can be made due to temperature distortion in actual long-play to make air film protection usefulness decline in time or even lose efficacy; (4) carefully thin flow deflector 42 can make air film helium stream absorb the heat of high-temperature fuel gas and heat up, thus greatly reducing the slit air film anti-yaw damper effect to nozzle throat; (5) this air film is corresponding parts machining and Project Realization difficulty are big, particularly flow deflector 42 size is tiny and be space curved surface, processing technique is complicated and is easily deformed, and the slit width of this " pure slit cooling air film " is only small, background technology document is of a size of 0.127mm, it is achieved uniformly air film is significantly high to the tolerance on air-flow and optical axis direction and matching requirements. It is to say, above-mentioned gaseous film control is inreal solves the technology relevant to gain generator nozzle throat ablation and engineering problem.

Summary of the invention

The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, it is provided that a kind of can produce uniformly, the throat's gaseous film control nozzle component for anti-yaw damper gain generator of the cooling air film of stable, anti-yaw damper and concordance processing good, easy, easily assembling.

For solving above-mentioned technical problem, the present invention by the following technical solutions:

A kind of throat's gaseous film control nozzle component for anti-yaw damper gain generator, including the uniform array some jet pipe blades in described nozzle component, each piece of described jet pipe blade includes shrinking leading portion along the flow direction of high temperature primary air successively, throat section and expansion segment, venturi is formed between the throat section of adjacent two described jet pipe blades, described nozzle component includes shrinking leading portion body and throat section body, described contraction leading portion body and described throat section body are to position end surfaces, described contraction leading portion body and/or throat section body are provided with the air film slit relative to location sunken end face, described air film slit connects between described contraction leading portion and throat section and with described venturi.

Further improvement as technique scheme:

The buffering cavity that described throat section connects towards the recessed and described air film slit in side of described air film slit; Arranging the throat with cold air communication in described throat section for air cavity, described throat is for the some micropores being arranged to connect between air cavity and described buffering cavity, and some described micropores are evenly arranged towards described cushion chamber volume array.

Described cushion chamber body is positioned at the middle part of described throat section; Described throat is arranged along the short transverse of described jet pipe blade for air cavity, described micropore along the short transverse uniform array of jet pipe blade on the diapire of described buffering cavity.

It is arranged to the water cooling chamber of Forced water cooling along blade height direction in described contraction leading portion.

The side of described throat section arranges water conservancy diversion wall, and described water conservancy diversion wall extends to the lower section of described venturi along the coolant outlet of described air film slit.

Being additionally provided with the jet pipe being connected with extraneous cold air source on described nozzle component for air cavity, described jet pipe connects for air cavity with described throat for air cavity.

Described nozzle component also includes expansion segment body, and described expansion segment is arranged at described expansion segment, and this is internal, and described contraction leading portion body, throat section body and expansion segment body are fixedly connected on described gain generator each through securing member.

Described expansion segment and throat section are one-body molded and be respectively positioned on described throat section this is internal, described nozzle component also includes expansion segment body, described expansion segment is arranged at described expansion segment, and this is internal, described expansion segment and throat section are one-body molded, and described contraction leading portion body, throat section body weld technique with expansion segment body each through electron beam or high power laser and be connected on described gain generator.

Described air film slit width range for 0.2mm��1.0mm, cooling gas used by air film is helium or nitrogen.

The width of described air film slit is 0.5mm.

Compared with prior art, it is an advantage of the current invention that:

1, shrink leading portion body and/or throat section body is provided with the air film slit relative to location sunken end face, air film slit is shrinking between leading portion and throat section, the air film slit of each jet pipe blade that this structure is formed, there is good dimensional uniformity, engineering easily realizes, and the cooling air film that can realize each jet pipe blade has good uniformity; Uniform cooling air film is in long circular flow process; each nozzle component effectively can be protected; avoid each jet pipe blade that serious Partial ablation occurs; improve the anti-yaw damper performance that jet pipe blade is overall, thus improving gain generator life-span and the high pitched tune pressure operational reliability of chemical laser.

2, micropore concordance is good, along jet pipe blade height direction uniform array, by along blade height direction cooling gas drain, be directed in cushion chamber body, and by control microwell array gas inlet and outlet pressure reduction realize cooling gas uniform distribution on each jet pipe blade height direction.

3, cooling gas enters buffering in cushion chamber body through micropore spray, and buffering cavity makes air-flow close to stagnation, and thermograde is little, and the side wall surface heat flow density of air film slit is little. Cooling gas, under water conservancy diversion wall guide functions, forms adherent cooling air film, and cooling air film accelerates to pass through venturi together with high temperature primary air along water conservancy diversion wall, it is to avoid venturi ablation.

Accompanying drawing explanation

Fig. 1 is the structural representation of the critical piece that burning drives supersonic speed fluoride deuterium/hydrogen fluoride chemical laser in prior art.

Fig. 2 is the structural representation of the HYLTE jet pipe blade of nozzle component.

Fig. 3 is the structural representation after the jet pipe blade of Fig. 2 being improved in prior art.

Fig. 4 is the present invention structural representation for throat's gaseous film control the first embodiment of nozzle component of anti-yaw damper gain generator.

Fig. 5 is the corresponding component schematic diagram forming air film slit in Fig. 4.

Fig. 6 is the structural representation of the jet pipe blade of nozzle component in Fig. 4.

Fig. 7 is the present invention structural representation for throat's gaseous film control nozzle component the second embodiment of anti-yaw damper gain generator.

Fig. 8 is the structural representation of the jet pipe blade of nozzle component in Fig. 7.

In figure, each label represents:

1, ejector filler; 2, combustor;3, nozzle component; 4, leading portion is shunk; 5, throat section; 6, expansion segment; 7, venturi; 8, air film slit; 9, contraction section; 10, gain generator; 20, optical resonator; 30, auxiliary exhaust system; 40, leading portion body is shunk; 41, water cooling chamber; 42, flow deflector; 50, throat section body; 51, buffering cavity; 52, throat is for air cavity; 53, micropore; 54, water conservancy diversion wall; 55, jet pipe is for air cavity; 60, expansion segment body; 400, leading portion location end face is shunk; 500, throat section location end face.

Detailed description of the invention

Fig. 4 to Fig. 6 illustrates that the first of the present invention is for the embodiment of throat's gaseous film control nozzle component of anti-yaw damper gain generator, this nozzle component includes the uniform array some jet pipe blades in nozzle component, each piece of jet pipe blade includes shrinking leading portion 4, throat section 5 and expansion segment 6 along the flow direction of high temperature primary air successively, form venturi 7 between the throat section 5 of adjacent two jet pipe blades, circulate for gas, nozzle component includes shrinking leading portion body 40, throat section body 50 and expansion segment body 60, shrink leading portion 4 and be positioned at contraction leading portion body 40, throat section 5 is positioned at throat section body 50, shrink leading portion body 40 with throat section body 50 to position end surfaces, shrinking leading portion body 40 and/or throat section body 50 is provided with the air film slit 8 relative to location sunken end face, air film slit 8 is shrinking between leading portion 4 and throat section 5 and is connecting with venturi 7. the air film slit 8 of each jet pipe blade that this structure is formed, there is good dimensional uniformity, engineering easily realizes, and the cooling air film that can realize each jet pipe blade has good uniformity, uniform cooling air film is in long running, nozzle component effectively can be protected, avoid each jet pipe blade that serious Partial ablation occurs, improve the anti-yaw damper performance that jet pipe blade is overall, thus burning can be realized drive chemical laser long-play, thoroughly solve burning and drive chemical laser nozzle throat section, especially the ablation problem that venturi long-play exists, it is greatly improved gain generator life-span and the operational reliability of chemical laser, realize rift-free hot spot of stablizing to export.

In the present embodiment, refer to Fig. 4, shrink leading portion body 40 and be provided with contraction leading portion location end face 400, throat section body 50 is provided with throat section location end face 500, shrinking leading portion location end face 400 with throat section location end face 500 is a pair adjacent positioned end face, and two location end faces are plane, specifically, in conjunction with Fig. 5, the location end face fovea superior at throat section body 50 sets the degree of depth sinking step plane as d1; After adjacent positioned plane 400 and 500 Butt Assembling, shrink and between leading portion 4 and throat section 5, form the air film slit 8 that width is d1. Shrink leading portion body 40, throat section body 50 and sinking step plane and all can adopt milling pin technique, higher flatness can be reached, it is ensured that air film slit 8 has good dimensional uniformity on each blade, and engineering easily realizes; Determined the width d1 of air film slit 8 by two good interplanar spacings of flatness, the cooling air film that can realize each jet pipe blade is respectively provided with good uniformity along blade height and optical axis direction. Certainly, in other embodiments, it is possible in section body 40, a recessed degree of depth is the sinking step plane (not shown go out) of d1 before deflation, and now step plane flushes with the side shrinking leading portion 4.Or, in before deflation on the location end face of section body 40 and throat section body 50, a recessed overall width is the sinking step plane (not shown go out) of d1, and this step plane all flushes with the side of contraction leading portion 4 and throat section 5.

The width d1 of above-mentioned air film slit 8 can take different values according to suitable environment, and the suitability is good. In the present embodiment, the span of air film slit 8 width d1 is 0.2mm��1.0mm, both can guarantee that good cooling effect, saves again cold air air inflow. More preferably, the width of air film slit 8 is 0.5mm.

In the present embodiment, referring to Fig. 6, throat section 5 is towards the recessed buffering cavity 51 connected with air film slit 8 in side of air film slit 8; Arranging the throat with cold air communication in throat section 5 for air cavity 52, throat is for the some micropores 53 being arranged to connect between air cavity 52 with buffering cavity 51, and some micropores 53 are evenly arranged towards buffering cavity 51 array. This micropore 53 adopts drilling technique, and aperture can realize good concordance, and the distribution of concordance good micropore 53 array supplies the gas of air cavity 52 to enter buffering cavity 51 from throat; This buffering cavity 51 can be substantially reduced the air velocity from micropore 53 to close to stagnation.

In the present embodiment, buffering cavity 51 is positioned at the middle part of throat section 5, air film slit 8 is symmetrically arranged in the both sides of buffering cavity 51, this structure makes low speed flow can be allocated in each air film slit 8 uniformly, then low speed flow extends in air film slit 8 and forms uniformly adherent flowing air film, the thermograde of this flowing air film is little, and the side wall surface heat flow density of air film slit 8 is little. Throat is arranged along the short transverse of jet pipe blade for air cavity 52, cools down blade along short transverse; Micropore 53 along jet pipe blade short transverse uniform array in buffering cavity 51 diapire on, again refer to Fig. 5, micropore 53 diameter is d, n is evenly arranged, micropore 53 concordance is good, along jet pipe blade height direction uniform array, by along blade height direction cooling gas drain, be directed in buffering cavity 51, and realize cooling gas uniform distribution on each jet pipe blade height direction by controlling the gas inlet and outlet pressure reduction of micropore 53 array.

In the present embodiment, shrink the water cooling chamber 41 being arranged to Forced water cooling in leading portion 4 along blade height direction, shrink leading portion 4 and take sufficient Forced water cooling by water cooling chamber 41, it is to avoid shrink leading portion 4 ablation. Additionally, high temperature primary air is isolated by above-mentioned throat section 5 by cooling air film, it is to avoid ablation; The contraction leading portion 4 of anti-yaw damper and throat section 5 can ensure that air film slit 8 goes out in photoreduction process not change over time for a long time, form stable cooling air film.

In the present embodiment, the side of throat section 5 arranges water conservancy diversion wall 54, and this water conservancy diversion wall 54 extends to the lower section of venturi 7 along the coolant outlet of air film slit 8. Cooling gas, under water conservancy diversion wall 54 guide functions, forms adherent cooling air film, isolation high temperature primary air and venturi 7, and cooling air film accelerates by venturi 7 along water conservancy diversion wall 54 together with high temperature primary air, it is to avoid venturi 7 ablation.

In the present embodiment, nozzle component also includes expansion segment body 60, expansion segment 6 is arranged in expansion segment body 60, shrink leading portion body 40, throat section body 50 is fixedly connected on gain generator with expansion segment body 60 each through securing member, it is bolted connection as adopted, simple in construction, easy to operate.

In the present embodiment, nozzle component being additionally provided with the jet pipe being connected with extraneous cold air source for air cavity 55, this jet pipe connects for air cavity 52 with throat for air cavity 55, provides cold air for throat for air cavity 52, and jet pipe supplies pressure of compressed air in air cavity 55 by external world's control and adjustable.

The cooling gas of the present embodiment is helium, naturally it is also possible to for nitrogen or other noble gases, the gas from combustor is that high temperature, high pressure, Strong oxdiative are containing fluorine atom primary air. in nozzle component running, air film helium after measuring from outer supply single channel enters jet pipe for air cavity 55, it is evenly distributed to the throat on each blade again for air cavity 52, then pass through micropore 53 uniform spray on blade height direction and enter in buffering cavity 51, helium speed is slowed down to stagnation by buffering cavity 51, uniformly supply to again each air film slit 8, low speed flow extends in air film slit 8 and forms uniformly adherent flowing helium air film, after air film air-flow and the primary air containing fluorine atom meet, under the guide functions of water conservancy diversion wall 54, turn and form adherent protection air film, accelerate by venturi 7 and at the mutual Laminar flow mixing of intersection small part together with primary air along water conservancy diversion wall 54, at venturi 7 place, adherent helium air film is effectively isolated high temperature containing fluorine atom Strong oxdiative primary air and venturi 7 wall, thus avoiding the ablation that high heat flux primary air brings, and venturi 7 critical cross-section size is remained unchanged in long-play process, according to supersonic speed critical flow flow formula, after supply gas stability of flow, corresponding combustor total pressure does not change over, this formula is also the measurement diagnosis criterion of gaseous film control effectiveness.

One nozzle component experiment exemplar of the embodiment of the present invention 1, its design parameter is as follows: the jet pipe number of blade is 21, venturi 7 is 20, the period pitch of jet pipe blade uniform array is 7mm, nozzle component outlet effective depth is 30mm, nozzle component outlet effective width is 138mm, and the height of venturi 7 is 0.24mm; Micropore 53 diameter of phi 0.4mm, the micropore spacing along blade height direction is 3mm; Micropore 53 adds up to 189, and micropore 53 upstream and downstream air film helium spray pressure reduction is about 40%, and throat is about 0.56MPa for air cavity 52 stagnation pressure, and combustor total pressure is about 0.4MPa, and air film slit 8 gap width is 0.5mm, and buffering cavity 51 sectional dimension is 2.2mm*1.5mm; Throat is 2.2mm*3mm for the sectional dimension of air cavity 52; These design parameters are to utilize aerodynamics formula to calculate according to the flow operating mode of each node location.

Above-mentioned experiment exemplar have passed through actual tests checking, combustion chamber gases fuel is Nitrogen trifluoride, hydrogen and helium, stagnation pressure 0.38MPa, flame temperature is 2300K, helium air film flow 7.576g/s, has carried out 10s ablation experiments 5 times, each 2 times of 30s and 60s ablation experiments, demonstrates the good ablation resistance of gain generator of the application; Having carried out 10s ablation experiments respectively when helium air film flow is 7.576g/s, 6.475g/s, 5.716g/s and 5.065g/s, this gain generator all embodies good ablation resistance. In these checking tests, combustor total pressure does not all change over, it was demonstrated that the gain generator nozzle component of the present embodiment 1 can be formed effective protection by helium air film.

Fig. 7 to Fig. 8 illustrates the second embodiment for throat's gaseous film control nozzle component of anti-yaw damper gain generator of the present invention, the present embodiment is essentially identical with first embodiment, differ only in: in this enforcement, expansion segment body 60 and throat section body 50 are one-body molded, expansion segment 6 is one-body molded with throat section 5, shrink leading portion body 40, throat section body 50 and expansion segment body 60 and be connected on gain generator each through electron beam or high power laser welding technique, easy for installation.

Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention. Any those of ordinary skill in the art, when without departing from technical solution of the present invention scope, may utilize the technology contents of the disclosure above and technical solution of the present invention are made many possible variations and modification, or be revised as the Equivalent embodiments of equivalent variations. Therefore, every content without departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.

Claims (9)

1. the throat's gaseous film control nozzle component for anti-yaw damper gain generator, including the uniform array some jet pipe blades in described nozzle component, each piece of described jet pipe blade includes shrinking leading portion (4) along the flow direction of high temperature primary air successively, throat section (5) and expansion segment (6), venturi (7) is formed between the throat section (5) of adjacent two described jet pipe blades, described nozzle component includes shrinking leading portion body (40) and throat section body (50), it is characterized in that: described contraction leading portion body (40) and described throat section body (50) are to position end surfaces, described contraction leading portion body (40) and/or throat section body (50) are provided with the air film slit (8) relative to location sunken end face, described air film slit (8) is positioned between described contraction leading portion (4) and throat section (5) and connects with described venturi (7), the buffering cavity (51) that described throat section (5) connects towards the recessed and described air film slit (8) in side of described air film slit (8), throat with cold air communication is set in described throat section (5) for air cavity (52), described throat is for the some micropores (53) being arranged to connect between air cavity (52) and described buffering cavity (51), and some described micropores (53) are evenly arranged towards described buffering cavity (51) array.

2. the throat's gaseous film control nozzle component for anti-yaw damper gain generator according to claim 1, it is characterised in that: described buffering cavity (51) is positioned at the middle part of described throat section (5); Described throat is arranged along the short transverse of described jet pipe blade for air cavity (52), described micropore (53) along the short transverse uniform array of jet pipe blade on the diapire of described buffering cavity (51).

3. the throat's gaseous film control nozzle component for anti-yaw damper gain generator according to claim 1, it is characterised in that: the water cooling chamber (41) of Forced water cooling it is arranged in described contraction leading portion (4) along blade height direction.

4. the throat's gaseous film control nozzle component for anti-yaw damper gain generator according to claim 1, it is characterized in that: the side of described throat section (5) arranges water conservancy diversion wall (54), described water conservancy diversion wall (54) extends to the lower section of described venturi (7) along the coolant outlet of described air film slit (8).

5. the throat's gaseous film control nozzle component for anti-yaw damper gain generator according to claim 1, it is characterized in that: being additionally provided with the jet pipe being connected with extraneous cold air source on described nozzle component for air cavity (55), described jet pipe connects for air cavity (52) with described throat for air cavity (55).

6. the throat's gaseous film control nozzle component for anti-yaw damper gain generator as claimed in any of claims 1 to 5, it is characterized in that: described nozzle component also includes expansion segment body (60), described expansion segment (6) is arranged in described expansion segment body (60), and described contraction leading portion body (40), throat section body (50) are fixedly connected on described gain generator each through securing member with expansion segment body (60).

7. the throat's gaseous film control nozzle component for anti-yaw damper gain generator as claimed in any of claims 1 to 5, it is characterized in that: described nozzle component also includes expansion segment body (60), described expansion segment (6) is arranged in described expansion segment body (60), described expansion segment (6) and throat section (5) are one-body molded, and described contraction leading portion body (40), throat section body (50) weld technique with expansion segment body (60) each through electron beam or high power laser and be connected on described gain generator.

8. the throat's gaseous film control nozzle component for anti-yaw damper gain generator as claimed in any of claims 1 to 5, it is characterized in that: described air film slit (8) width range for 0.2mm��1.0mm, cooling gas used by air film is helium or nitrogen.

9. the throat's gaseous film control nozzle component for anti-yaw damper gain generator according to claim 8, it is characterised in that: the width of described air film slit (8) is 0.5mm.