RU189929U1 - GAS BOTTLE EJECTOR - Google Patents

Abstract

The utility model is used in energy technology equipment of various industries. The essence of the utility model: contains a housing with nozzles for supplying active and passive gas flows and an interchangeable active gas flow nozzle installed in it and a gas flow mixing chamber associated with a diffuser. To increase the mixing area of active and passive flows at the entrance to the throat, the supersonic nozzle is made of lobes, i.e. after the critical section, it is divided into four communicating petals, and at the exit from the top of each petal, a pointed chevron is installed tangentially to its flow part. The receiving chamber is made in the form of a truncated cone, a ball shell segment and a hemispherical shell, as well as a profiled annular liner, which ensures the leveling of the velocity field of the passive flow. The mixing chamber is cylindrical, the flow part of the neck and the diffuser is made in the form of a hyperboloid. The geometry of the flow part of the gas-jet ejector is smoothed at the points of transition between its structural elements, which increases the gas-dynamic efficiency of the gas-jet ejector due to the decrease in resistance in the path of the active and mixed gas.

Description

The utility model relates to energy technology equipment of various industries, namely to gas ejectors and can be used in the gas industry, in which devices of jet technology are used.

It is known a device of similar purpose, similar in application, "Gas ejector", authors A. Soboloyeva, V. Zrypagaeva. and others, according to the patent of the Russian Federation No. 2341691, IPC F04F 5/18; F04F 55/44, containing a convergent mixing chamber, throat, diffuser, and supersonic active gas nozzle. Along the exit edge of the supersonic nozzle at a certain angle to its axis evenly placed compact edifiers, made in the form of tabs [1].

The disadvantage of this device is low efficiency, due to insufficient turbulization of the active flow at the exit of the nozzle when using only small vortex formers in the form of tabs.

There is a patent for the invention "Gas ejector", authors Baikov VS, Vasilyeva Yu.N., under the patent of the USSR No. 629326, IPC F04F 5/14, which is a gas ejector containing an active nozzle with symmetrical nozzle openings of various sizes, mixing chamber and diffuser.

The disadvantage of this device is low efficiency, due to energy losses of the active flow to eddy currents formed in the voids between the active flow jets behind the nozzles and the outlet end of the wall separating the nozzles [2].

There is also a patent for the invention of "Gas jet ejector", authors Beloteva V.A., Romanenkova L.V., under the USSR patent No. 1044839, IPC F04F 5/14, which is a gas-jet ejector containing an active nozzle, mixing chamber, diffuser and ring a receiving chamber with a passive medium supply pipe connected to it, the receiving chamber in the zone of connecting the pipe to it being made confused, and from the diametrically opposite side - diffusive [3].

The disadvantages of such an ejector are its low efficiency due to the following factors:

insufficient turbulization of the active flow at the nozzle exit;

the lack of smoothing the geometry of the flow part in the transition between the structural elements of the device.

The closest prototype of the proposed utility model is the “Gas Ejector”, by the authors M. M. Khtiev, Z. Ignatenko, et al., Under the USSR Patent No. 827854, IPC F04F 5/14, which is a gas ejector containing an active nozzle formed the walls of the hollow vessel, the bottom of which is located in the inlet of the passive medium inlet, and the inlet pipe of the active medium, having a perforated outlet section located in the active nozzle. The bottom of the body of the active nozzle is made of a streamlined shape and is convex towards the flow of the passive medium [4].

The disadvantages of the selected prototype are its low efficiency due to the following factors:

the active flow in front of the nozzle loses a significant amount of energy due to the sudden expansion of the nozzle supplying the active medium, the flow of the active flow through the perforations, as well as the rotation of the active flow through 180 °;

attaching the bottom of the active nozzle to the nozzle for supplying the passive medium may create resistance for the passive flow;

the active medium inlet pipe clutters up the middle of the cross section of the mixing chamber and the diffuser, thereby impairing their operation.

The objective of the proposed utility model is to eliminate the above disadvantages and create a gas-jet ejector with high gas-dynamic efficiency (EFF).

The technical result of the proposed solution is as follows:

increased gas-dynamic efficiency due to the use of a confused-diffuser channel, which ensures the symmetry of the velocity field of the passive flow at the entrance to the mixing chamber;

increased gas-dynamic efficiency due to the use of a receiving chamber made of a funnel in the shape of a truncated cone, a ball-shell segment and a hemispherical shell, which ensures a uniform entrance of the passive flow into the neck;

increased gas-dynamic efficiency due to the smooth reversal of the passive flow through 180 ° in the hemispherical section of the receiving chamber, which helps level the velocity field;

increased gas-dynamic efficiency due to the reduction of vortex formations between the active gas supply pipe and the hemispherical shell, due to the additional introduction of a profiled annular liner;

increased gas-dynamic efficiency due to the use of a supersonic nozzle, which, after a critical section, is divided into four interconnected lobes to increase the mixing area of active and passive flows at the entrance to the throat of the supersonic nozzle;

increased gas-dynamic efficiency due to the additionally installed pointed chevrons at the exit from the top of each petal tangentially to its flow for the turbulization of the active flow;

increased gas-dynamic efficiency due to the use of the profiled geometry of the outer wall of the supersonic nozzle, contributing to the reversal of the passive flow with minimal losses and its uniform entry into the throat;

increased gas-dynamic efficiency due to the smoothing of the geometry of the flow-through part of a gas-jet ejector at the points of transition between its structural elements, the performance of the flow-through part of the throat and diffuser in the form of a hyperboloid, which reduces the resistance in the path of the active and mixed gas.

The gas-jet ejector (figure 1) consists of a nozzle for supplying active gas 1, a supersonic nozzle 3, a nozzle for supplying passive gas 8, a receiving chamber 9, a throat 10, a mixing chamber 6 and a diffuser 7.

The supersonic nozzle (figure 2) is made petal, i.e. after the critical section is divided into four interlocking lobes. At the exit from the top of each petal, the pointed chevron 11 is tangential to its flow part. The outer wall of the supersonic nozzle is shaped like the inside.

Receiving chamber 9 consists of a funnel 5 in the shape of a truncated cone, a segment of a ball shell 4 and a hemispherical shell 2, as well as a profiled annular liner 12.

The mixing chamber 6 is cylindrical, the flow part of the neck 10 and the diffuser 7 is made in the form of a hyperboloid. The geometry of the flow-through part of the gas-jet ejector is smoothed at the transition points between its structural elements, namely, between the active gas supply pipe 1 and the hemispherical shell 2 (using the shaped annular liner 12), between the receiving chamber 9 and the throat 10, between the segment of the ball shell 4 and funnel 5, between the supply of passive gas 8 and the funnel 5.

Gas jet ejector works as follows.

The active gas flows through the nozzle 1 into the supersonic nozzle 3, where it accelerates to supersonic speed, and thanks to the nozzle exit section of the nozzle and the pointed chevron 11, turbulization of the active gas jet, an increase in the contact area of the active and passive gas at the entrance to the neck 10 and Kelvin rings break -Helmholtz, which increases the efficiency and speed of the mixing process.

Passive gas enters through the nozzle 8 into the funnel 5 of the receiving chamber 9, where at the bottom (the shortest path of passive gas to the throat) the gas moves along the confuser channel, and at the top (long way of the passive gas to the throat) through the diffuser through the segment of the ball shell 4 towards hemispherical shell 2. Thus, there is a redistribution of pressure of the passive gas and its alignment over the cross section between the wall of the receiving chamber 9 and the protrusion of the neck 10. After a smooth rotation of the passive flow through 180 ° in the hemispherical section with me chamber, formed by a spherical shell segment 4 and a profiled annular liner 12, there is a further alignment diagrams of passive gas velocity at the inlet of the throat 10.

In the neck 10, the jet of active gas from supersonic nozzle 3 creates a vacuum, thereby drawing the passive gas into the mixing chamber 6, where the gases are mixed and energy is exchanged. From the mixing chamber 6, the gas mixture enters the diffuser 7, where, with minimal energy loss, due to the hyperboloid shape of the flow part, the velocity decreases and the gas pressure increases. From the diffuser a mixture of gases is diverted to the consumer.

Smoothing the geometry of the flow-through part of a gas-jet ejector at the points of transition between its structural elements, as well as the absence of obstacles to the most high-potential active and mixed gases, reduces the energy losses of high-potential flows to friction and the formation of vortices.

Thus, the application in the proposed gas-jet ejector of a supersonic petal nozzle with pointed chevrons and a profiled wall together with a receiving chamber made in the form of a truncated cone and a ball-shell segment, while smoothing the geometry of the flow part and the absence of obstacles in the path of the most high-potential active and mixed gases, significantly increase the efficiency of the gas jet ejector.

Information sources

1. Patent No. 2341691 of the Russian Federation, IPC F04F 5/18, F04F 55/44. Gas ejector. Soboloyev A.N., Zapryagaev V.I., Malkov V.M. - №2007100659 / 06; declare 09/01/2007; publ. 12/20/2008 (equivalent).

2. Patent No. 629326 USSR, IPC F04F 5/14. Gas ejector. Baikov V.S., Vasilyev Yu.N. - №2093869 / 22-03; declare 07.01.75; publ. 10.25.78 (equivalent).

3. Patent No. 1044839 USSR, IPC F04F 5/14. Gas ejector. Belotelov V.A., Romanenkov L.V. - №3436739 / 25-06; declare 05/12/1982; publ. 09/30/1983 (equivalent).

4. Patent No. 827854 USSR, IPC F04F 5/14. Gas ejector. Gutiev M.Kh., Ignatenko Z.T. - №2780298 / 25-06; declare 06/15/1979; publ. 05/07/1981 (prototype).

Claims (2)

1. A gas-jet ejector containing an active supersonic nozzle with a throat, an active gas supply nozzle, a passive gas supply nozzle and a gas flow mixing chamber, characterized in that the receiving chamber is made in the form of a truncated cone and a ball-feed segment with the formation of an additional confuser-diffuser the canal, the flow part of the neck and the diffuser are made in the form of a hyperboloid, and the supersonic nozzle after the critical section is made in the form of four communicating lobes, on top of the dogo of which is parallel to the axis of the supersonic nozzle mounted triangular chevron. 2. Gas jet ejector according to claim. 1, characterized in that the outer wall is made of the same shape with the inner.

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