CN108593303A - A kind of pre-heating system design scheme based on storage heater - Google Patents
A kind of pre-heating system design scheme based on storage heater Download PDFInfo
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- CN108593303A CN108593303A CN201810190450.XA CN201810190450A CN108593303A CN 108593303 A CN108593303 A CN 108593303A CN 201810190450 A CN201810190450 A CN 201810190450A CN 108593303 A CN108593303 A CN 108593303A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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Abstract
A kind of pre-heating system design scheme based on storage heater disclosed by the invention can be used for the preheating design for the storage heater that accumulation of heat battle array maximum preheating temperature is 2300K using natural gas as fuel.Pre-heating system includes:Preheated burning device ontology, combustion air air inlet pipeline, natural gas air inlet pipe road, preheated fuel gas discharge pipe, high pressure airline, diaphragm protection pipeline, the quick butterfly valve of high temperature.Natural gas is lighted in preheated burning device, generates high-temperature fuel gas；Combustion air air inlet pipeline provides excessive combustion air, separately reserved oxygen interface, can be under heating temperature 2200K states using the technology of oxygenating burning；Natural gas air inlet pipe road provides suitable natural gas；It after high-temperature fuel gas preheating, is discharged from preheated fuel gas discharge duct, preheated fuel gas discharge duct uses injection blending mode to reduce the temperature of discharge combustion gas；Warm is provided a small amount of high pressure cold air and is cooled down heater by high pressure airline and diaphragm protection pipeline；By high temperature quick setup valve protection preheated burning device during heater work.
Description
Technical field
The present invention relates to scramjet engine ground experiment technical fields, specifically, being related to a kind of heat accumulating type heating
The scramjet engine combustor test system regions of device.
Background technology
Currently, western developed country starts to be used for scramjet engine ground experiment using storage heater, wherein
Most of preheating method of heater preheats for high-temperature fuel gas.Such heater can provide for scramjet engine ground experiment
High temperature " pure " air, allows experiment to carry out the flight test of more High Mach number, has been greatly facilitated scramjet engine
Experimental study.Hollow brick storage heater preheating method in fluid dynamic engineering company of U.S. Channel-9 wind-tunnel is adopted
With propane combustion heating and electrical heating parallel mode, the pneumatic thrust experiment of Mach number 7 to 14 can be carried out；Japanese aerospace institute RJTF
Hollow brick storage heater in wind-tunnel is preheated using high-temperature fuel gas.It can carry out the flight test of Mach number 4,6,8；France
Aluminium oxide cobble bed storage heater in the space office hypersonic blow down wind tunnels of S4 uses the high temperature of propane/air burning
Combustion gas preheats, and can carry out the wind tunnel test task of 6.4~10 range of Mach number.So far, the country has not been used in superb
The storage heater of velocity of sound wind-tunnel, more without the preheated burning system for such heater.
Preheated burning device technology is the key technical problem of storage heater system, needs to realize preheated burning device pre-
Heat and heater work both difference it is bigger in the state of safe and reliable docking, it is ensured that the fuel completely burned such as natural gas
With the fuel gas flow for obtaining stabilization, fuel completely burned can avoid generating " pollution " gas in heater, ensure heater outlet
For " pure " gas.In warm should fast heating at high temperature gitter brick, avoid the initial preheating temperature type of accumulation of heat battle array again
Slope is more than its maximum permissible value.Pre-heating system should be designed to that different flow burns, and have stringent cooling provision again, to protect
The performance of card heater reaches requirement.
Invention content
The present invention is that pre-heating system used by solving the Preheating of storage heater includes:Preheated burning device sheet
Body, combustion air air inlet pipeline, natural gas air inlet pipe road, preheated fuel gas discharge pipe, high pressure airline, diaphragm protection pipe
Road, the quick butterfly valve of high temperature.
Preheated burning device (Fig. 2) includes mainly that combustion air air inlet, natural gas air inlet, nozzle and spark plug etc. are main
Component forms.Combustion air air inlet is welded on heater top flange face, is connect with pipeline by flange, in combustion air
One group of cyclone blade is arranged at air inlet, natural gas and combustion air can be made to be sufficiently mixed, and reduces the length of flame.Natural gas air inlet
Pipe enters heater across combustion air tuned port injection, below natural gas air inlet pipe road, be sequentially arranged igniter, fire inspection instrument,
Pressure sensor, temperature sensor.Igniter selection electric plug lights small torch, and burner, fire inspection instrument are lighted with small torch
For checking whether natural gas is lighted, whether burn stops, ensureing that equipment being capable of safe operation；
Venture tube and vortex-shedding meter are configured on preheated burning device air inlet pipeline, accurately and reliably measure preheating combustion
The air mass flow of burner determines the fuel gas temperature of preheated burning device.Pneumatic two-position butterfly valve separately is configured in combustion air air inlet pipeline,
Combustion air flow is adjusted using the aperture of butterfly valve.Combustion air air inlet pipeline configures air blower 1, air cleaner, gas
Dynamic Double position butterfly valve, venture tube, each 1 of pneumatic ball valve, 1, pressure gauge, differential pressure pick-up 2, combustion-aid air pipe road are pre-
Oxygen interface is stayed, it can be under heating temperature 2200K states using the technology of oxygenating burning；The configuration of natural gas air inlet pipe road is cut manually
Only each 1 of valve, manual exhaust valve, natural air cleaner, electronic pressure reducing valve, venture tube, pneumatic ball valve, 1, pressure gauge are poor
Pressure sensor 2；
One layer of heat-barrier material is poured into a mould in preheated fuel gas discharge pipe (Fig. 3) initial segment pipe, connects a high temperature and pressure thereafter
Ball valve is aspirated combustion gas with an air blower later by the way of injection, on the one hand combustion gas can be made smoothly to exclude, on the other hand
Cold air is mixed to reduce the temperature of discharge combustion gas by ginseng, is conducive to protect discharge tube.Preheated fuel gas discharge pipe includes just
Heat-insulated pipeline section, electric high-temperature high-pressure ball valve 1, temperature sensor 1, injection ginseng mixing system, the ginseng of beginning mix exhaust emissions pipeline section；
High temperature and pressure air damages burning spray pipeline when working in order to avoid preheated burning device, and when work passes through
Diaphragm gas circuit is continually fed into the high pressure cold air of small flow from top, both can avoid high temperature air and the direct of corresponding component connects
It touches, can also take away the radiant heat of high temperature air.High pressure airline configure hand stop valve, manual exhaust valve, electric pressure-regulating valve,
Each 1 of venture tube, pneumatic ball valve, 1, pressure gauge, differential pressure pick-up 2；Diaphragm protection pipeline flowing electric pressure-regulating valve,
Each 1 of electric throttle valve, venture tube, pneumatic ball valve 3, differential pressure pick-up 3.
The quick butterfly valve of high temperature is arranged in the junction of preheated burning device and storage heater ontology.In storage heater plus
When pressure and work, high temperature and pressure air is cut off by high temperature butterfly valve and enters preheated burning device；In addition it is that butterfly valve is avoided to exist centainly
Leakage, the high pressure cold air that small flow is continually fed into preheated burning device is protected.Quick butterfly valve structure is simple, action
It is sensitive, using pneumatic device, can quickly be opened and closed within 1 second time.
Advantageous effect
A kind of pre-heating system design scheme is proposed the present invention is based on storage heater, including preheated burning device ontology, is helped
Fire air intake conduit, natural gas air inlet pipe road, preheated fuel gas discharge pipe, high pressure airline, diaphragm protection pipeline, high temperature
Quick butterfly valve.Using natural gas as fuel, the high-temperature fuel gas that different flow is carried out to storage heater gitter brick preheats, together
When heat-insulated cooling provision ensure the safety of pre-heating system, can be used for the heat accumulating type that accumulation of heat battle array maximum preheating temperature is 2300K and heat
The preheating of device.
Description of the drawings
Below in conjunction with the accompanying drawings with embodiment to a kind of pre-heating system design scheme based on storage heater of the present invention
It is described in further detail.
Fig. 1 storage heater pipeline valve configuration diagrams.
Fig. 2 preheated burning device ontology schematic diagrames.
Fig. 3 preheated fuel gas discharge pipe schematic diagrames.
Fig. 4 heater warm gas flows.
Theoretical fuel gas temperature curve of Fig. 5 natural gases from air under different mixing ratios.
Fig. 6 preheated burning device working curve schematic diagrames
In figure：1. air blower 2. air cleaner, 3. pressure gauge, 4. pressure sensor, 5. pneumatic two-position butterfly valves 6. are poor
11. air bleeding valve of pressure sensor 7. venture tube, 8. pneumatic ball valve, 9. pressure reducing valve, 10. shut-off valve, 12. natural gas bottle group
13. the 14 temperature monitoring battle array that is flexible coupling, 15. throttle valve, 16. pressure regulator valve, 17. electric high-temperature high-pressure ball valve, 18. high-pressure air tank tank
19 reserved oxygen interfaces 20, igniter 21, pressure sensor 22, fire inspection instrument 23, temperature sensor 24, combustion air into
Mouthfuls 25, cyclone blade 26, natural gas air inlet pipe 27, collection chamber 28, electric high-temperature high-pressure ball valve 29, injection blending 30,
Air blower 31, heat-barrier material
Specific implementation mode
The present embodiment is that storage heater preheats overall process.
Storage heater accumulation of heat battle array maximum preheating temperature Preliminary design is 1900K-2000K, will be strictly in warm
It is more than its maximum permissible value to avoid the initial preheating temperature type slope of accumulation of heat battle array.
Tank body upper left pipeline is combustion air admission line in Fig. 1, and tank body upper right pipeline is natural gas air inlet pipe road, tank body
Lower-left pipeline is preheated fuel gas discharge pipe, and tank body bottom right pipeline is high pressure airline, and tank body right side pipeline is that diaphragm is protected
Pipeline.What red thick line indicated in Fig. 4 is the pipeline ventilated in warm.
Step 1：Refering to fig. 1 and Fig. 4, the ball valve and air blower of preheated fuel gas discharge pipe are first opened；It regulates again combustion-supporting
Air mass flow opens combustion air pipeline valve；Then the valve for opening high pressure airline, makes high pressure gas be flowed into along pipeline
In heater, high pressure gas is protection gas herein；Gas discharge is finally regulated, gas pipeline valve is opened, is started pre-
Heat combustor igniter, after lighting a fire successfully, high-temperature fuel gas flows through storage heater and is carried out in advance to thermal storage unit " from top to bottom "
Heat.
Step 2：Determine that heater preheating preheats scheme using three phases：(1) come with the combustion gas stream of low temperature, low discharge
The preheating for carrying out one section of long period, so that reaching the quasi-steady state Temperature Distribution of a relative low temperature；(2) with a high temperature, low
The combustion gas stream of flow carries out the preheating of one section of long period, so that reach the quasi-steady state Temperature Distribution of a higher temperatures；(3) with
One high temperature, big flow combustion gas stream carry out the short time and quickly heat, high-temperature region at the top of thermal storage unit is further extended into institute
The depth needed.The first two stage generates required slope temperature mode, and three phases generate required top constant temperature zone.
Step 3: calculating theoretical fuel gas temperature of the natural gas from air under different mixing ratios.Natural gas is with air not
With such as table 1 of the theoretical fuel gas temperature under mixing ratio, curve is as shown in Figure 5.
1 thermodynamic computing result of table
The mixing ratio of air and natural gas is can be seen that in 22-24 from table 1 and Fig. 5, and the theoretical temperatures of combustion gas are about
2000K.Consider that the combustion gas total temperature after efficiency of combustion is 1900K, the highest operating mode of preheated burning device is mixing ratio 23.In order to as possible
The pollution level of air preheat is reduced, oxygen-enriched combusting mode is selected in the combustion gas in preheated burning device.
Step 4: calculating the flow of natural gas and air.Imported gas latus rectum is φ 50mm, and air is by natural gas air inlet
Enter around pipe, import latus rectum is φ 200mm, to the maximum that the thermodynamic computing result that preheated burning device carries out is preheated burning device
Gas flow is 0.14Kg/s.
If maximum stream flow is 0.14Kg/s, ：
The flow of natural gas is：
Air mass flow is：
Step 5: assuming to begin to warm up accumulation of heat battle array from room temperature or relative low temperature condition, until required maximum functional temperature
Degree.Preheated burning device works in 1000K-1900K temperature regions, the flow region of 0.01Kg/s-0.15Kg/s, such as Fig. 6.Most
Heater can be made to be preheating to eventually：The temperature gradient dT of accumulation of heat battle array slope sections/ dL≤500K/m, accumulation of heat battle array bottom temp are less than
800K, accumulation of heat battle array top maximum temperature is 1900K.
Step 6: entire warm-up phase is by longitudinal of temperature control system monitoring system monitoring thermal storage unit in heater body
Section temperature state until reaching scheduled thermal storage unit longitudinal temperature distribution, while paying attention to controlling thermal storage unit bottom temp
No more than predetermined value.The combustion gas exhaust pipe road of warm-up phase is blended by cold air to lower temperature to lower temperature
Discharging directly into atmosphere.
Step 7: during heater test, the cooling water channel of preheated burning device keeps opening, to prevent from being gone out by heater
The high-temperature gas of mouth is burnt out, and pressure-air gas circuit is first shut off after heater test, is then shut off heater outlet high temperature
Shut-off valve continues the supply for keeping each cooling water channel/gas circuit.Start preheated burning device system, thermal storage unit is vulcanized again
Heat is filled, into next experimental period, the heater reheating time is generally shorter, and test efficiency is higher, therefore heat accumulating type heats
Pilot system often uses multicycle long run test, and capacity usage ratio is high, good economy performance.
Claims (2)
1. a kind of pre-heating system design scheme based on storage heater, feature include：Preheated burning device ontology, combustion-supporting sky
Gas air inlet pipeline, natural gas air inlet pipe road, preheated fuel gas discharge pipe, high pressure airline, diaphragm protection pipeline, high temperature are quick
Butterfly valve.Arrangement cyclone blade arranges fire inspection instrument to check whether fuel is ignited to reduce the length of flame in preheated burning device；It helps
It fires air intake conduit and excessive combustion air is provided, separately reserved oxygen interface, can use and mend under heating temperature 2200K states
The technology of oxygen burning；Natural gas air inlet pipe road provides suitable natural gas；After high-temperature fuel gas preheating, from preheated fuel gas discharge duct
Discharge, preheated fuel gas discharge duct use injection blending mode to reduce the temperature of discharge combustion gas；Warm is by pressure-air
Pipeline and diaphragm protection pipeline provide a small amount of high pressure cold air cooling protection heater；By high temperature quick setup during heater work
Valve protection preheated burning device.
2. the pre-heating system course of work is as follows：
Step 1: first opening the ball valve and air blower of preheated fuel gas discharge pipe；Combustion air flow is regulated again, is opened combustion-supporting
Air pipe line valve；Then the valve for opening high pressure airline, makes high pressure gas be flowed into heater along pipeline, herein high pressure
Gas is protection gas；Gas discharge is finally regulated, gas pipeline valve is opened, starts preheated burning device igniter, point
After igneous work(, high-temperature fuel gas flows through storage heater " from top to bottom " and is preheated to thermal storage unit.
Step 2: determining that heater preheating preheats scheme using three phases：(1) it is carried out with the combustion gas stream of low temperature, low discharge
The preheating of one section of long period, so that reaching the quasi-steady state Temperature Distribution of a relative low temperature；(2) with high temperature, a low discharge
Combustion gas stream carry out the preheating of one section of long period so that reach the quasi-steady state Temperature Distribution of a higher temperatures；(3) with one
High temperature, big flow combustion gas stream carry out the short time and quickly heat, high-temperature region at the top of thermal storage unit is further extended into required
Depth.The first two stage generates required slope temperature mode, and three phases generate required top constant temperature zone.
Step 3: calculating theoretical fuel gas temperature of the natural gas from air under different mixing ratios.The mixing ratio of air and natural gas
In 22-24, the theoretical temperatures of combustion gas are about 2000K.Consider that the combustion gas total temperature after efficiency of combustion is 1900K, preheated burning device
Highest operating mode be mixing ratio 23.In order to reduce the pollution level of air preheat to the greatest extent, the combustion gas in preheated burning device is selected rich
Oxygen combustion system.
Step 4: calculating the flow of natural gas and air.Imported gas latus rectum is φ 50mm, and air is by natural gas air inlet pipe week
Entrance is enclosed, import latus rectum is φ 200mm, to the maximum combustion gas that the thermodynamic computing result that preheated burning device carries out is preheated burning device
Flow is 0.14Kg/s.If maximum stream flow is 0.14Kg/s, It obtains natural
The flow of gas：Air mass flow：
Step 5: assuming to begin to warm up accumulation of heat battle array from room temperature or relative low temperature condition, until required maximum operation temperature.In advance
Heat combustor works in 1000K-1900K temperature regions, the flow region of 0.01Kg/s-0.15Kg/s.Heating can finally be made
Device is preheating to：The temperature gradient dT of accumulation of heat battle array slope sections/ dL≤500K/m, accumulation of heat battle array bottom temp are less than 800K, accumulation of heat battle array top
Portion's maximum temperature is 1900K.
Step 6: entire warm-up phase is by longitudinal section of temperature control system monitoring system monitoring thermal storage unit in heater body
State of temperature until reaching scheduled thermal storage unit longitudinal temperature distribution, while noticing that control thermal storage unit bottom temp cannot
More than predetermined value.The combustion gas exhaust pipe road of warm-up phase is blended by cold air to lower temperature, can discharging directly into atmosphere.
Step 7: in the heater course of work, the cooling water channel of preheated burning device keeps opening, to prevent by heater outlet
High-temperature gas is burnt out, and pressure-air gas circuit is first shut off after heater test, is then shut off the cut-off of heater outlet high temperature
Valve continues the supply for keeping each cooling water channel/gas circuit.Start preheated burning device system, reheating supplement heat is carried out to thermal storage unit
Amount, into next experimental period, the heater reheating time is generally shorter, and test efficiency is higher, therefore heat accumulating type heat run
System often uses multicycle long run test, and capacity usage ratio is high, good economy performance.
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| CN201810190450.XA CN108593303B (en) | 2018-03-08 | 2018-03-08 | Preheating system using method based on heat accumulating type heater |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793777A (en) * | 2019-10-23 | 2020-02-14 | 清华大学 | Testing arrangement of effect is preheated in simulation diesel engine intake duct environment air admission |
| CN110885988A (en) * | 2019-12-16 | 2020-03-17 | 云南云铝海鑫铝业有限公司 | Natural gas roasting grooving method |
| CN111221364A (en) * | 2019-11-22 | 2020-06-02 | 西安航天计量测试研究所 | High-precision large-flow gas heating device and method |
| CN112378084A (en) * | 2020-10-27 | 2021-02-19 | 西安航天动力研究所 | Supporting structure of hollow brick heat storage array |
| CN112729847A (en) * | 2021-01-02 | 2021-04-30 | 北京航天三发高科技有限公司 | Small-flow incoming flow parameter simulation test bed |
| CN112762444A (en) * | 2020-12-31 | 2021-05-07 | 中国航天空气动力技术研究院 | Optimization method for heat accumulator temperature distribution curve at initial moment of ventilation process |
| CN113532787A (en) * | 2021-08-26 | 2021-10-22 | 中国科学院力学研究所 | Measurement and control device of heat storage heater for wind tunnel experiment |
| CN113685841A (en) * | 2021-08-26 | 2021-11-23 | 中国科学院力学研究所 | Working medium supply system for wind tunnel experiment heat storage heater and construction method |
| CN113701982A (en) * | 2021-08-26 | 2021-11-26 | 中国科学院力学研究所 | Measurement and control method of heat storage heater for wind tunnel experiment |
| CN114279709A (en) * | 2021-12-28 | 2022-04-05 | 北京航空航天大学 | Supercritical kerosene heating device and heating method for supersonic test bed |
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| CN110793777A (en) * | 2019-10-23 | 2020-02-14 | 清华大学 | Testing arrangement of effect is preheated in simulation diesel engine intake duct environment air admission |
| CN110793777B (en) * | 2019-10-23 | 2021-05-25 | 清华大学 | Testing arrangement of effect is preheated in simulation diesel engine intake duct environment air admission |
| CN111221364B (en) * | 2019-11-22 | 2021-05-11 | 西安航天计量测试研究所 | High-precision large-flow gas heating device and method |
| CN111221364A (en) * | 2019-11-22 | 2020-06-02 | 西安航天计量测试研究所 | High-precision large-flow gas heating device and method |
| CN110885988A (en) * | 2019-12-16 | 2020-03-17 | 云南云铝海鑫铝业有限公司 | Natural gas roasting grooving method |
| CN112378084A (en) * | 2020-10-27 | 2021-02-19 | 西安航天动力研究所 | Supporting structure of hollow brick heat storage array |
| CN112378084B (en) * | 2020-10-27 | 2022-01-07 | 西安航天动力研究所 | Supporting structure of hollow brick heat storage array |
| CN112762444A (en) * | 2020-12-31 | 2021-05-07 | 中国航天空气动力技术研究院 | Optimization method for heat accumulator temperature distribution curve at initial moment of ventilation process |
| CN112762444B (en) * | 2020-12-31 | 2022-08-12 | 中国航天空气动力技术研究院 | Optimization method for heat accumulator temperature distribution curve at initial moment of ventilation process |
| CN112729847A (en) * | 2021-01-02 | 2021-04-30 | 北京航天三发高科技有限公司 | Small-flow incoming flow parameter simulation test bed |
| CN113532787A (en) * | 2021-08-26 | 2021-10-22 | 中国科学院力学研究所 | Measurement and control device of heat storage heater for wind tunnel experiment |
| CN113685841A (en) * | 2021-08-26 | 2021-11-23 | 中国科学院力学研究所 | Working medium supply system for wind tunnel experiment heat storage heater and construction method |
| CN113701982A (en) * | 2021-08-26 | 2021-11-26 | 中国科学院力学研究所 | Measurement and control method of heat storage heater for wind tunnel experiment |
| CN113532787B (en) * | 2021-08-26 | 2022-06-21 | 中国科学院力学研究所 | Measurement and control device of heat storage heater for wind tunnel experiment |
| CN114279709A (en) * | 2021-12-28 | 2022-04-05 | 北京航空航天大学 | Supercritical kerosene heating device and heating method for supersonic test bed |
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