CN109723569B - Shear type rectangular nozzle device for researching plasma enhanced jet mixing - Google Patents
Shear type rectangular nozzle device for researching plasma enhanced jet mixing Download PDFInfo
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Abstract
The invention relates to a shear type rectangular nozzle device, which is applied to the experimental research of plasma enhanced jet mixing and belongs to the technical field of plasma flow control. The nozzle device comprises an inner nozzle, an outer nozzle and a gas collection chamber. The gas collection chamber is formed by assembling a front end cover, a rear end cover and a middle partition plate. The inner nozzle comprises an inner nozzle support and two inner nozzle wall plates, the inner nozzle support is fixed on the middle partition plate, and the two inner nozzle wall plates are fixed on the inner nozzle support. The outer nozzle is composed of an outer nozzle upper part and an outer nozzle lower part, and the outer nozzle is fixed on the front end cover. The invention can realize the laying and discharging of the plasma exciter, develop the research on the mixing of the plasma enhanced jet flow and has the function of adjusting various parameters. Meanwhile, the device has the advantages of compact structure, simple part processing, convenience in disassembly and assembly and high reliability.
Description
Technical Field
The invention relates to a shear type rectangular nozzle device, which is applied to the experimental research of plasma enhanced jet mixing and belongs to the technical field of plasma flow control.
Background
The jet flow has important application in combustion chambers and exhaust ports of aerospace aircrafts, chemical reactors and cooling systems, and has very important significance in improving the mixing and development characteristics and the noise characteristics of the jet flow. The plasma flow control technology based on surface dielectric barrier discharge is an effective means for improving the jet mixing degree. The exciter is composed of an exposed electrode and an implanted electrode, which are separated by an insulating medium layer on the upper side and the lower side of the insulating medium layer, respectively, as shown in fig. 1. High-frequency high-voltage excitation is applied between the two electrodes, and a large enough electric field gradient can be generated above the implanted electrode dielectric layer, so that air is ionized to generate plasma, and charged particles move directionally under the action of the electric field to induce the air to form directional jet flow.
At present, experimental research on plasma enhanced jet mixing is carried out at home and abroad, but a common nozzle configuration which is mostly single-component and has a relatively simple structure is adopted, and a nozzle specially used for plasma discharge is not developed. In addition, due to the fixed structure, the position for laying the plasma exciter is limited, the layout mode is single, and the diversified researches are difficult to be deeply developed.
Disclosure of Invention
The application aims to solve the problems existing in the existing nozzle experimental device, and provides a shear type two-dimensional rectangular nozzle device for researching plasma enhanced jet mixing. Meanwhile, the installation and the layout at any angle of a single or a plurality of plasma exciters at different positions (the inner wall and the outer wall of the inner nozzle, the inner wall and the outer wall of the outer nozzle) and the adjustment of various characteristic parameters (the gap width of the inner nozzle, the gap width of the outer nozzle and the premixing length) of the nozzle can be realized, and different influence factors can be investigated, so that abundant research can be developed.
In order to solve the technical problem, the technical scheme adopted by the application is as follows:
a shear rectangular nozzle device for researching plasma enhanced jet mixing comprises an inner nozzle, an outer nozzle and a gas collection chamber, wherein the inner nozzle and the outer nozzle both extend out of the interior of the gas collection chamber, and the inner nozzle extends out of the interior of the outer nozzle; wherein:
a front end cover and a rear end cover are respectively arranged on the front side and the rear side of the gas collection chamber, a middle partition plate is arranged at the joint of the front end cover and the rear end cover, and the central area of the middle partition plate is a rectangular hollow area; the front end cover is provided with a front end cover air inlet, and the rear end cover is provided with a rear end cover air inlet; the gas collection chamber forms two independent gas collection spaces by using the middle partition plate, and the gas inlet holes of the front end cover and the rear end cover are connected with an external parallel gas supply pipeline to respectively supply gas to the external nozzles and the internal nozzles.
The inner nozzle comprises an inner nozzle support and two inner nozzle wall plates, the inner nozzle support is fixed on the middle partition plate, the inner nozzle support is provided with a support rib, and the two inner nozzle wall plates are fixed on the support rib and combined into the inner nozzle; the inner nozzle wall plate firstly penetrates through the inner nozzle gasket and then extends out of the rectangular hollow area of the middle partition plate; the inner nozzle realizes air supply through the rear end cover air inlet;
the outer nozzle is composed of an outer nozzle upper part and an outer nozzle lower part, the outer nozzle is fixed on the front end cover, and air supply is realized through the front end cover air inlet.
Furthermore, the front end cover, the rear end cover and the middle isolation plate are provided with bolt holes at corresponding positions, and hexagon socket head bolts sequentially penetrate through the bolt holes in the front end cover, the middle isolation plate and the rear end cover to assemble the front end cover, the rear end cover and the middle isolation plate into the gas collection chamber.
Further, the inner nozzle support comprises a support wall plate and support ribs, the support ribs are perpendicular to the support wall plate, the support wall plate is parallel to the middle partition plate, and the two inner nozzle wall plates are perpendicular to the support wall plate and fixed on the support ribs; the inner nozzle gasket is arranged between the support wall plate and the middle partition plate; the support wallboard, the inner nozzle gasket and the middle isolation plate are provided with waist-shaped holes at corresponding positions, and the inner hexagonal bolt sequentially penetrates through the waist-shaped holes of the support wallboard, the inner nozzle gasket and the middle isolation plate to fix the inner nozzle support on the middle isolation plate.
Further, outer nozzle upper portion and outer nozzle lower part all include base and outer nozzle wallboard, outer nozzle wallboard perpendicular to the base sets up, the base is on a parallel with the front end housing sets up, and the relevant position of two bases and front end housing all is equipped with waist shape hole, and interior hex bolts passes the waist shape hole of two bases and front end housing in proper order will outer nozzle is fixed on the front end housing.
Further, the vent holes of the inner nozzle and the outer nozzle are both rectangular, and the length-width ratio of each vent hole is greater than 50; both sides of the inner nozzle wall plate and both sides of the outer nozzle wall plate can be laid with plasma exciters or directly used as dielectric barrier layers of the plasma exciters; the tail ends of the two outer nozzle wall plates are provided with positioning holes.
Furthermore, the inner nozzle gasket, the middle isolation plate and the two side assembly surfaces of the outer nozzle base close to the front end cover are provided with sealing rubber rings.
Further, in the above-mentioned case,
the two inner nozzle wall plates have the same geometric parameters and are aligned in the length and width directions respectively;
the outer nozzle wall plates comprise flat walls and side walls positioned on two sides of the flat walls and are in a C-shaped surrounding structure; the flat wall thicknesses of the two outer nozzle wall plates are the same, and the side wall thicknesses of the two outer nozzle wall plates are also the same; the height of the side wall of each outer nozzle wall plate is equal to the sum of the height of the short side wall and the thickness of the flat wall, the short side wall of each outer nozzle wall plate is arranged corresponding to the long side wall of another outer nozzle wall plate, a slit is reserved on the outer side of the short side wall, and the width of the slit is equal to the thickness of the side wall;
the central area of the outer nozzle base close to the front end cover is hollow and is used for penetrating through the other outer nozzle wall plate; the sum of the length of the outer nozzle wall plate close to the front end cover and the thickness of the base of the outer nozzle wall plate is equal to the length of the other outer nozzle wall plate.
Further, the inner nozzle and the outer nozzle are made of ceramic and polytetrafluoroethylene; the gas collection chamber is made of stainless steel materials.
Further, the straight edges of the waist-shaped holes are all arranged along the vertical direction.
Furthermore, 5 front end cover air inlets are formed in the front end cover, 4 rear end cover air inlets are formed in the rear end cover, and the front end cover air inlets and the rear end cover air inlets are transversely arranged at equal intervals and are connected with an external air supply pipeline.
The invention has the beneficial effects that:
1. the gas collection chamber adopts the middle isolation plate and is assembled with the inner nozzle bracket and the inner nozzle gasket, the gas collection chamber is divided into two separate gas collection spaces which are respectively connected with the outer nozzle and the inner nozzle, and the two nozzles have the function of independently adjusting gas supply.
2. The air inlets of the rear end cover and the front end cover of the air collection chamber are transversely and equidistantly distributed, the pipelines are connected in parallel, the arrangement mode can ensure that the flow rates of different positions of the nozzle are basically the same, in addition, the length-width ratio requirement of the nozzle is more than 50, and the two points are integrated to ensure that the jet flow has good two-dimensional flow characteristics, namely, the jet flow field has consistency along the transverse direction.
3. The inner nozzle and the outer nozzle are made of non-metal materials such as ceramic and polytetrafluoroethylene with good insulation, the requirement of plasma exciter discharge on the insulation of a carrier can be met, high voltage applied by an exciter is prevented from being conducted with a metal gas collection chamber and the outside, and the wall surface of the nozzle can be directly used as a dielectric barrier layer of the plasma exciter by utilizing the insulation property of the nozzle.
4. The sizes of the two parts of the inner nozzle support and the inner nozzle gasket can be serialized, the material of the wall surface of the nozzle can be serialized, and corresponding parts can be selected for assembly according to experimental research and investigation of the influence of different materials and size parameters.
5. The inner nozzle and the outer nozzle are processed in a split mode and then assembled, the plasma exciter can be laid before assembly, the exciter can be laid conveniently and quickly at any position, and the operation performance is high in the experiment.
Drawings
FIG. 1 is a schematic diagram of an SDBD exciter;
FIG. 2 is an isometric view of a shear rectangular nozzle assembly according to the present invention;
FIG. 3 is a front view of a shear rectangular nozzle device according to the present invention;
FIG. 4 is a side cross-sectional view of a shear rectangular nozzle device according to the present invention;
FIG. 5 is an exploded view of the shear rectangular nozzle assembly of the present invention;
FIG. 6 is a schematic view of an inner nozzle support of the shear rectangular nozzle apparatus of the present invention;
FIG. 7 is a schematic view of a portion of the upper portion of the outer nozzle of the shear rectangular nozzle apparatus of the present invention;
FIG. 8 is a schematic view of the lower portion of the outer nozzle of the shear rectangular nozzle apparatus of the present invention;
wherein, 11, a gas collecting chamber; 120. a front end cover; 121. a hexagon socket head cap screw; 122. a front end cover air inlet; 130. a middle separator plate; 140. a rear end cap; 141. a rear end cover air inlet; 150. an inner nozzle shim; 21. an inner nozzle; 220. an inner nozzle support; 221. a hexagon socket head cap screw; 222. a support wall plate; 223. a support rib; 224. a waist-shaped hole; 230. an inner nozzle wall panel; 31. an outer nozzle; 320. the lower part of the outer nozzle; 321. a base; 330. an outer nozzle upper portion; 331. a hexagon socket head cap screw; 332. a long side wall; 333. short side walls; 334. a waist-shaped hole; 335. positioning holes; 336. a flat wall.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A shear type rectangular nozzle device for researching plasma enhanced jet mixing is disclosed, and referring to FIGS. 2-5, the device comprises an inner nozzle 21, an outer nozzle 31 and a gas collection chamber 11, wherein the inner nozzle 21 and the outer nozzle 31 both extend out of the inside of the gas collection chamber 11, and the inner nozzle 21 extends out of the inside of the outer nozzle 31.
A front end cover 120 and a rear end cover 140 are respectively arranged on the front side and the rear side of the plenum chamber 11, a middle partition plate 130 is arranged at the joint of the front end cover 120 and the rear end cover 140, and the central area of the middle partition plate 130 is a rectangular hollow area and is used for passing through the inner nozzle 21. Specifically, the front end cover 120, the rear end cover 140 and the middle partition plate 130 are provided with bolt holes at corresponding positions, and the hexagon socket head cap bolts 121 sequentially pass through the bolt holes on the front end cover 120, the middle partition plate 130 and the rear end cover 140 to assemble the front end cover 120, the rear end cover 140 and the middle partition plate 130 into the plenum chamber 11. The gas collection chamber is divided into two independent gas collection spaces which are respectively connected with the outer nozzle and the inner nozzle, so that the outer nozzle and the inner nozzle have the function of independently adjusting gas supply.
The inner nozzle 21 comprises an inner nozzle support 220 and two inner nozzle wall plates 230, the inner nozzle support 220 is fixed on the middle partition plate 130, the inner nozzle support 220 is provided with a support rib 223, and the two inner nozzle wall plates 230 are both fixed on the support rib 223 and combined into the inner nozzle 21; the inner nozzle wall plate 230 passes through the inner nozzle spacer 150 and then protrudes from the rectangular hollow area of the middle partition plate 130; the inner nozzle 21 is supplied with air through a rear end cover air inlet hole 141.
Referring to fig. 2 to 6, the inner nozzle support 220 includes support wall plates 222 and support ribs 223, the support ribs 223 are disposed perpendicular to the support wall plates 222, the support wall plates 222 are disposed parallel to the intermediate partition plate 130, and the two inner nozzle wall plates 230 are disposed perpendicular to the support wall plates 222 and fixed to the support ribs 223. The inner nozzle shim 150 is disposed between the carrier wall plate 222 and the intermediate spacer plate 130. The bracket wall plate 222, the inner nozzle gasket 150 and the middle partition plate 130 are provided with kidney-shaped holes at corresponding positions, and the inner nozzle bracket 220 is fixed on the middle partition plate 130 by an inner hexagonal bolt 221 which sequentially passes through the kidney-shaped holes 224 of the bracket wall plate 222, the inner nozzle gasket 150 and the middle partition plate 130.
Referring to fig. 5, 7-8, the outer nozzle 31 is composed of an outer nozzle upper part 330 and an outer nozzle lower part 320, and the outer nozzle 31 is fixed on the front end cover 120 and supplied with air through the front end cover air inlet 122.
Outer nozzle upper part 330 and outer nozzle lower part 320 all include base 321 and outer nozzle wallboard, outer nozzle wallboard perpendicular to base 321 sets up, base 321 is on a parallel with the front end housing 120 sets up, and the relevant position of two bases 321 and front end housing 120 all is equipped with waist shape hole 334, and interior hex bolts 331 pass two bases 321 and front end housing 120's waist shape hole in proper order will outer nozzle 31 is fixed on the front end housing 120.
The front end cover 120 is provided with 5 front end cover air inlet holes 122, the rear end cover 140 is provided with 4 rear end cover air inlet holes 141, the front end cover air inlet holes 122 and the rear end cover air inlet holes 141 are transversely arranged at equal intervals and are connected with an external air supply pipeline, namely, the air supply pipeline is connected in parallel, and the arrangement mode can ensure that the flow rates of different positions of the nozzle are basically the same. In addition, the vent holes of the inner nozzle 21 and the outer nozzle 31 are rectangular, and the length-width ratio of the vent holes is larger than 50, and the two points are combined to enable the jet flow to have good two-dimensional flow characteristics, namely the jet flow field is consistent along the transverse direction.
And sealing rubber rings are arranged on the inner nozzle gasket 150, the middle isolation plate 130 and the two side assembling surfaces of the outer nozzle base 321 close to the front end cover 120.
The two inner nozzle wall plates have the same geometric parameters and are respectively aligned in the length direction and the width direction.
The outer nozzle wall plates comprise a flat wall 336 and side walls positioned on two sides of the flat wall 336 and form a C-shaped surrounding structure; the flat walls 336 of the two outer nozzle wall panels are the same in thickness, as are the side walls of the two outer nozzle wall panels; the side wall height of each outer nozzle wall plate is long and short, the height of the long side wall 332 is equal to the sum of the height of the short side wall 333 and the thickness of the flat wall 336, the short side wall 333 of an outer nozzle wall plate is arranged corresponding to the long side wall 332 of another outer nozzle wall plate, wherein a slit is left outside the short side wall 333, and the width of the slit is the same as the thickness of the side wall;
the outer nozzle base 321 proximate the front end cap 120 is hollow in a central region for passage through another outer nozzle wall panel; the sum of the length of the outer nozzle wall proximate the front end cap 120 and the thickness of its base 321 is equal to the length of the other outer nozzle wall.
The gas collection chamber 11 is made of stainless steel materials. The inner nozzle 21 and the outer nozzle 31 are made of non-metal materials such as ceramic and polytetrafluoroethylene with good insulation, the requirement of plasma exciter discharge on the insulation of a carrier can be met, high voltage applied by an exciter is prevented from being conducted with a metal collection chamber and the outside, and in addition, a nozzle wall plate can be directly used as a plasma exciter medium barrier layer by utilizing the insulation property of the nozzle wall plate. The tail ends of the two outer nozzle wall plates are also provided with positioning holes 335 which are arranged up and down correspondingly. And both sides of the inner nozzle wall plate and both sides of the outer nozzle wall plate can be laid with plasma exciters or directly used as dielectric barrier layers of the plasma exciters. The inner nozzle and the outer nozzle are processed and assembled in a split mode, before the nozzle device is assembled, the dielectric barrier discharge plasma exciter is laid at a target position, the exciter can be laid at any position conveniently and quickly, and the operation performance is high in the experiment. The sizes of the two parts of the inner nozzle support and the inner nozzle gasket can be serialized, the material of the inner nozzle wall plate can be serialized, and corresponding parts can be selected for assembly according to the experimental research on the influence of different materials and size parameters.
Straight edges of the waist-shaped holes are all arranged along the vertical direction. The outer nozzle upper part 330 and the outer nozzle lower part 320 can be adjusted upward and downward, respectively, to achieve the change of the outer nozzle gap width. At the same time, the inner nozzle 21 can be adjusted up and down to change the distance from the upper and lower wall surfaces of the outer nozzle.
In conclusion, part of the parts of the nozzle device adopt a split machining and reassembling method, so that the parts of the same kind can be replaced by different sizes and materials, and can be finely adjusted along a specific direction, the research on various characteristic geometric parameters and the change of a dielectric barrier material of the nozzle can be carried out, and the single or multiple plasma exciters can be conveniently and rapidly laid at any positions of the nozzle and along any direction. The device has the advantages of compact structure, simple part processing, easy disassembly and assembly and higher reliability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A shear rectangular nozzle device for studying plasma enhanced jet mixing, comprising an inner nozzle (21), an outer nozzle (31) and a plenum chamber (11), wherein the inner nozzle (21) and the outer nozzle (31) both extend from the inside of the plenum chamber (11), and the inner nozzle (21) extends from the inside of the outer nozzle (31); wherein:
a front end cover (120) and a rear end cover (140) are respectively arranged on the front side and the rear side of the gas collection chamber (11), a middle partition plate (130) is arranged at the joint of the front end cover (120) and the rear end cover (140), and the central area of the middle partition plate (130) is a rectangular hollow area; a front end cover air inlet hole (122) is formed in the front end cover (120), and a rear end cover air inlet hole (141) is formed in the rear end cover (140);
the inner nozzle (21) comprises an inner nozzle support (220) and two inner nozzle wall plates (230), the inner nozzle support (220) is fixed on the middle partition plate (130), support ribs (223) are arranged on the inner nozzle support (220), and the two inner nozzle wall plates (230) are fixed on the support ribs (223) and combined into the inner nozzle (21); the inner nozzle wall plate (230) first passes through the inner nozzle gasket (150) and then protrudes from the rectangular hollow area of the intermediate partition plate (130); the inner nozzle (21) realizes air supply through the rear end cover air inlet hole (141);
the outer nozzle (31) is composed of an outer nozzle upper part (330) and an outer nozzle lower part (320), the outer nozzle (31) is fixed on the front end cover (120), and air supply is realized through the front end cover air inlet holes (122).
2. The shear rectangular nozzle device for studying plasma enhanced jet mixing of claim 1, wherein the front end cover (120), the rear end cover (140) and the middle separation plate (130) are provided with bolt holes at corresponding positions, and hexagon socket head bolts sequentially penetrate through the bolt holes on the front end cover (120), the middle separation plate (130) and the rear end cover (140) to assemble the front end cover (120), the rear end cover (140) and the middle separation plate (130) into the plenum chamber (11).
3. The shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 1, wherein the inner nozzle support (220) comprises a support wall plate (222) and a support rib (223), the support rib (223) being arranged perpendicular to the support wall plate (222), the support wall plate (222) being arranged parallel to the intermediate partition plate (130), the two inner nozzle wall plates (230) being arranged perpendicular to the support wall plate (222) and fixed to the support rib (223); the inner nozzle shim (150) is disposed between the support wall plate (222) and an intermediate divider plate (130); the support wall plate (222), the inner nozzle gasket (150) and the middle isolation plate (130) are provided with waist-shaped holes at corresponding positions, and the inner nozzle support (220) is fixed on the middle isolation plate (130) through the waist-shaped holes of the support wall plate (222), the inner nozzle gasket (150) and the middle isolation plate (130) by the aid of inner hexagonal bolts.
4. The shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 1, wherein the outer nozzle upper part (330) and the outer nozzle lower part (320) each comprise a base (321) and an outer nozzle wall plate, the outer nozzle wall plate is arranged perpendicular to the base (321), the base (321) is arranged parallel to the front end cover (120), the corresponding positions of the two bases (321) and the front end cover (120) are respectively provided with a kidney-shaped hole, and an inner hexagonal bolt sequentially penetrates through the kidney-shaped holes of the two bases (321) and the front end cover (120) to fix the outer nozzle (31) on the front end cover (120).
5. The shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 4, wherein the vent holes of the inner nozzle (21) and the outer nozzle (31) are both rectangular and have an aspect ratio of more than 50; both sides of the inner nozzle wall plate and both sides of the outer nozzle wall plate can be laid with plasma exciters or directly used as dielectric barrier layers of the plasma exciters; the tail ends of the two outer nozzle wall plates are also provided with positioning holes (335).
6. The shear rectangular nozzle device for studying mixing of plasma enhanced jets according to claim 4, characterized in that the inner nozzle gasket (150), the middle partition plate (130) and the two side assembling faces of the outer nozzle base (321) close to the front end cover (120) are provided with sealing rubber rings.
7. The shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 4,
the two inner nozzle wall plates have the same geometric parameters and are aligned in the length and width directions respectively;
the outer nozzle wall plates comprise flat walls (336) and side walls positioned on two sides of the flat walls (336) and are in a C-shaped surrounding structure; the flat walls (336) of the two outer nozzle wall plates have the same thickness, and the side walls of the two outer nozzle wall plates have the same thickness; the height of the side wall of each outer nozzle wall plate is long and short, the height of the long side wall (332) is equal to the sum of the height of the short side wall (333) and the thickness of the flat wall (336), the short side wall (333) of the outer nozzle wall plate is arranged corresponding to the long side wall (332) of the other outer nozzle wall plate, a slit is reserved on the outer side of the short side wall (333), and the width of the slit is the same as the thickness of the side wall;
an outer nozzle base (321) proximate the front end cap (120) is hollow in a central region thereof for passage through another outer nozzle wall panel; the sum of the length of the outer nozzle wall proximate the front end cap (120) and the thickness of its base (321) is equal to the length of the other outer nozzle wall.
8. The shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 1, wherein the inner nozzle (21) is made of one of ceramic or teflon, the outer nozzle (31) is also made of one of ceramic or teflon, and the plenum chamber (11) is made of stainless steel material.
9. A shear rectangular nozzle device for studying plasma enhanced jet mixing according to claim 3, wherein the straight sides of the kidney shaped apertures are all arranged in a vertical direction.
10. The shear rectangular nozzle device for studying mixing of plasma enhanced jet as claimed in claim 1, wherein 5 front end cover air inlets (122) are provided on the front end cover (120), 4 rear end cover air inlets (141) are provided on the rear end cover (140), and the front end cover air inlets (122) and the rear end cover air inlets (141) are arranged in a transversely equidistant arrangement and are connected with an external air supply pipeline.
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| CN112122614B (en) * | 2020-09-12 | 2022-09-27 | 青岛理工大学 | Self-excitation electrostatic field-driven spray deposition-based 3D printing device, working method and application thereof |
| CN112157906B (en) * | 2020-09-21 | 2022-05-27 | 青岛理工大学 | Method for preparing conductive biological scaffold based on self-excited electrostatic field driven melt jet 3D printing |
| CN114992673B (en) * | 2022-06-10 | 2024-06-07 | 中国科学院工程热物理研究所 | Nozzle capable of inhibiting combustion chamber from oscillating combustion |
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| CN106793438B (en) * | 2017-01-17 | 2019-01-11 | 大连民族大学 | Ring type electrode variable diameter jet flow generating apparatus |
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