CN112504612A - Two-throat real-time adjustable super-expanding section - Google Patents
Two-throat real-time adjustable super-expanding section Download PDFInfo
- Publication number
- CN112504612A CN112504612A CN202011595077.XA CN202011595077A CN112504612A CN 112504612 A CN112504612 A CN 112504612A CN 202011595077 A CN202011595077 A CN 202011595077A CN 112504612 A CN112504612 A CN 112504612A
- Authority
- CN
- China
- Prior art keywords
- adjusting
- throat
- adjusting sheet
- section
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a two-throat real-time adjustable over-expanding section, which comprises a common over-expanding section and a throat adjusting unit, wherein the common over-expanding section comprises a contraction section, a square-cylindrical straight section and an expansion section, the throat adjusting unit comprises two groups of adjusting wall plates respectively provided with a driving unit and a slide rail unit, the adjusting wall plates are symmetrically arranged from left to right, the adjusting wall plates comprise an inner front adjusting sheet, an inner middle adjusting sheet and an inner rear adjusting sheet which are sequentially hinged, the front ends and the rear ends of the two groups of adjusting wall plates are respectively connected with the left side wall and the right side wall of the straight section through the slide rail unit, the driving unit comprises a push rod and a driving mechanism, the two groups of driving mechanisms are arranged on the left side and the right side outside the straight section, one end of the push rod is connected with the driving mechanism, and the other end of. The invention can save labor, has high efficiency and good sealing and realizes real-time adjustment of the diameter of the two throats.
Description
Technical Field
The invention relates to the fields of sub, span, ultra and hypersonic wind tunnels and engine test bed equipment, and mainly aims at the design of a diffusion section.
Background
The super-expanding section (also called diffuser) is positioned at the downstream of a test section of a wind tunnel or a test bed and has the functions of: (1) the energy loss of the air flow is reduced, and the operating pressure ratio of the wind tunnel is reduced. The supersonic velocity diffusion section can effectively reduce the air flow velocity, recover the kinetic energy of the air flow into pressure energy, and reduce the energy loss of the air flow at the outlet section of the wind tunnel or the test bed so as to save the energy consumption during the operation of the wind tunnel. (2) In a transonic speed range, particularly in a subsonic speed range, the Mach number of the test section can be effectively controlled through the blockage and throttling of the two throats, and downstream pressure pulsation and noise along the airflow can be effectively prevented from being transmitted to the test section. (3) When the wind tunnel or the test bed runs at a higher supersonic speed, the cross-sectional area of the two throats is reduced after the wind tunnel is started, the power consumption can be saved, and the running time sequence of the wind tunnel is prolonged.
The over-expanding section is divided into a fixed over-expanding section and an adjustable over-expanding section. Most of the adjustable super-expansion sections are adjusting plate type super-expansion sections with adjustable wall plates, and most of domestic wind tunnels adopt the method to adjust the area of the two throats of the super-expansion sections. The adjusting sheet type diffuser is divided into a non-real-time adjusting section and a real-time adjusting section, wherein the non-real-time adjusting section is the most part, and the non-real-time adjusting section refers to a super-expanding section which is used for adjusting the geometrical shape of a super-expanding section in advance before the wind tunnel runs and can be used for reducing the sectional area of two throats after the wind tunnel is started; the other small part is a real-time adjustable type, the wind tunnel can be adjusted in real time during operation, only a part of small wind tunnels are used at present, and the main defects are that the driving force required by an adjusting wall plate is large, the sealing is difficult and the abrasion is easy.
Disclosure of Invention
The invention provides a novel adjusting plate type super-expansion section, which can adjust the size of a second throat in real time and simultaneously avoid the problems of large driving force and difficult sealing of the traditional adjusting plate.
The two-throat real-time adjustable super-expanding section comprises a common super-expanding section and a throat adjusting unit, wherein the common super-expanding section comprises a contraction section, a square-cylindrical straight section and an expansion section, the throat adjusting unit comprises two groups of adjusting wall plates which are respectively provided with a driving unit and a sliding rail unit and are arranged symmetrically left and right, the adjusting wall plates comprise an inner front adjusting sheet, an inner middle adjusting sheet and an inner rear adjusting sheet which are sequentially hinged, the front and rear ends of each of the two groups of adjusting wall plates are respectively connected with the left side wall and the right side wall of the straight section by the aid of the slide rail units, the driving unit comprises a push rod and driving mechanisms, the two groups of driving mechanisms are arranged at the left side and the right side outside the straight section, one end of the push rod is connected with the driving mechanism, and the other end of the push rod penetrates through the side wall of the straight section and is fixedly connected to the side wall of the inner middle adjusting sheet, so that the inner middle adjusting sheet is pushed to move.
Preferably, the slide rail unit comprises two slide rails and two slide blocks, two groups of four slide rails are respectively installed in four grooves in the left side wall and the right side wall of the straight section, the four grooves are respectively arranged at the upper and lower positions of the left end part and the right end part of the two side walls, and the four matched slide blocks are respectively installed on the side walls of the inner front adjusting sheet and the inner rear adjusting sheet of each group in a hinged mode.
Preferably, the driving unit comprises two push rods, one end of each push rod is connected with the side wall of the inner middle adjusting sheet, and the other end of each push rod is connected with a driving shaft of the driving mechanism through a connecting plate.
Preferably, an O-shaped ring is arranged between the push rod and the side wall of the straight section to form a dynamic seal.
Preferably, gaps are reserved among the inner middle adjusting sheet, the inner front adjusting sheet and the inner rear adjusting sheet, and between the upper edge and the lower edge of each adjusting sheet and the upper wall and the lower wall of the middle straight section.
Compared with the prior art, the invention has the following advantages:
(1) the front and rear pressure of the inner middle adjusting sheet, the inner front adjusting sheet and the inner rear adjusting sheet are basically balanced, so that the driving force required by adjustment is small, and the power of a driving mechanism can be greatly reduced;
(2) the whole system is sealed only by the push rod and the circular sliding seal of the middle horizontal wall plate, so that the application range on the conventional piston seal is wide, and the whole seal is reliable.
Drawings
FIG. 1 is a top view of a two-throat real-time adjustable super-expansion section of the present invention.
FIG. 2 is a front view of a real-time adjustable super-expansion section of a two-throat duct of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a top view of a real-time adjustable over-expansion section of a two-throat passage of the invention, FIG. 2 is a front view of the real-time adjustable over-expansion section of the two-throat passage of the invention, and the real-time adjustable over-expansion section of the two-throat passage of the invention comprises a front contraction wall plate 1, a middle horizontal wall plate 2, a rear diffusion wall plate 3, a driving mechanism 4, a push rod 5, an inner front adjusting sheet 6, an inner middle adjusting sheet 7, an inner rear adjusting sheet 8, a guide rail 9 and a slide block 10; the front contraction wall plate 1, the middle horizontal wall plate 2 and the rear diffusion wall plate 3 are fixed wall plates and have certain strength and rigidity; the driving mechanism 4 provides driving force for the push rod; 2 push rods 5 are arranged on one side respectively and penetrate through the middle horizontal wall plate 2 to be fixedly connected with the inner middle adjusting sheet 7, and the push rods 5 and the middle horizontal wall plate 2 are sealed in an O-shaped ring dynamic sealing mode; the inner middle adjusting sheet 7 can move along the radial direction under the action of the push rod 5, the inner front adjusting sheet 6 and the inner rear adjusting sheet 8 are connected with the inner middle adjusting sheet 7 through hinges, the other end of the inner middle adjusting sheet is connected with the guide rail 9 through the slide block 10, and when the inner middle adjusting sheet 7 moves, the inner front adjusting sheet 6 and the inner rear adjusting sheet 8 follow up; certain gaps are reserved between the inner middle adjusting sheet 7, the inner front adjusting sheet 6, the inner rear adjusting sheet 8 and the upper edge and the lower edge of the middle horizontal wall plate 2, so that air flow can enter the middle parts of the inner middle adjusting sheet and the middle part of the middle horizontal wall plate and the air flow can basically balance the pressure of the front wall surface and the rear wall surface of the adjusting sheet. The slide rails 9 are mounted in grooves in the side walls of the middle horizontal wall 2, and the slide blocks 10 are mounted in an articulated manner on the back of the inner front flap 5 or the inner rear flap 8.
In the test process, the position of the inner middle adjusting sheet 7 is adjusted by adjusting the extension length of the driving mechanism 4, so that the diameter of the two throats is adjusted in real time.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (5)
1. The utility model provides a two real-time adjustable super sections of larynx which characterized in that: the throat adjusting device comprises a common super-expansion section and a throat adjusting unit, wherein the common super-expansion section comprises a contraction section, a square-tube-shaped straight section and an expansion section, the throat adjusting unit comprises two groups of adjusting wall plates with a driving unit and a slide rail unit respectively, the adjusting wall plates are arranged in a bilateral symmetry mode, the adjusting wall plates comprise an inner front adjusting sheet, an inner middle adjusting sheet and an inner rear adjusting sheet which are hinged in sequence, the front ends and the rear ends of the adjusting wall plates are connected with the left side wall and the right side wall of the straight section respectively through the slide rail unit, the driving unit comprises a push rod and a driving mechanism, the driving mechanism is arranged on the left side and the right side of the outside of the straight section, one end of the push rod is connected with the driving mechanism, and the other end of the push rod penetrates through the side wall of the straight section and is fixedly connected onto the side wall of the.
2. The two-throat real-time adjustable super-expansion section according to claim 1, characterized in that: the sliding rail unit comprises two sliding rails and two sliding blocks, two groups of four sliding rails are respectively installed in four grooves in the left side wall and the right side wall of the straight section, the four grooves are respectively arranged at the upper position and the lower position of the left end portion and the lower position of the right end portion of the two side walls, and the four matched sliding blocks are respectively installed on the side walls of the inner front adjusting sheet and the inner rear adjusting sheet of each group in a hinged mode.
3. The two-throat real-time adjustable super-expansion section according to claim 1, characterized in that: the driving unit comprises two push rods, one end of each push rod is connected with the side wall of the inner middle adjusting sheet, and the other end of each push rod is connected with a driving shaft of the driving mechanism through a connecting plate.
4. The two-throat real-time adjustable super-expansion section according to any one of claims 1 to 3, characterized in that: and an O-shaped ring is adopted between the push rod and the side wall of the straight section to form dynamic seal.
5. The two-throat real-time adjustable super-expansion section according to claim 4, characterized in that: gaps are reserved among the inner middle adjusting sheet, the inner front adjusting sheet and the inner rear adjusting sheet, and between the upper edge and the lower edge of each adjusting sheet and the upper wall and the lower wall of the middle straight section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595077.XA CN112504612A (en) | 2020-12-29 | 2020-12-29 | Two-throat real-time adjustable super-expanding section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595077.XA CN112504612A (en) | 2020-12-29 | 2020-12-29 | Two-throat real-time adjustable super-expanding section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112504612A true CN112504612A (en) | 2021-03-16 |
Family
ID=74951951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011595077.XA Pending CN112504612A (en) | 2020-12-29 | 2020-12-29 | Two-throat real-time adjustable super-expanding section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112504612A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945509A (en) * | 2021-04-22 | 2021-06-11 | 中国空气动力研究与发展中心超高速空气动力研究所 | Opening plugging device for contraction section of hypersonic speed wind tunnel diffuser |
| CN113701984A (en) * | 2021-10-28 | 2021-11-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel diffuser and design method thereof |
| CN114739714A (en) * | 2022-05-07 | 2022-07-12 | 上海金脉汽车电子有限公司 | Testing device and method for air-heating PTC product |
| CN115096541A (en) * | 2022-08-26 | 2022-09-23 | 中国航空工业集团公司沈阳空气动力研究所 | Sealing mechanism between wall plates of wind tunnel test section |
| CN115326346A (en) * | 2022-10-18 | 2022-11-11 | 中国航空工业集团公司哈尔滨空气动力研究所 | Easily-adjusted convertible side wall structure for closed test section |
| CN115371939A (en) * | 2022-08-09 | 2022-11-22 | 中国航空工业集团公司哈尔滨空气动力研究所 | Low-speed wind tunnel test section with adjustable section |
| CN115392062A (en) * | 2022-10-28 | 2022-11-25 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Supersonic velocity diffusion section design method |
| CN115493795A (en) * | 2022-11-16 | 2022-12-20 | 中国航空工业集团公司沈阳空气动力研究所 | Variable-angle mechanism multi-profile dynamic sealing device and using method |
| CN116519255A (en) * | 2023-03-13 | 2023-08-01 | 中国航空工业集团公司沈阳空气动力研究所 | Mach number accurate control system and method for continuous transonic wind tunnel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1198990A (en) * | 1966-12-01 | 1970-07-15 | British Aircraft Corp Ltd | Improvements relating to Wind-Tunnels |
| RU2460892C1 (en) * | 2011-04-29 | 2012-09-10 | Открытое акционерное общество "ОКБ Сухого" | Method of adjusting supersonic air intake |
| CN106525381A (en) * | 2016-12-02 | 2017-03-22 | 中国航空工业集团公司沈阳空气动力研究所 | Mach number adjusting mechanism suitable for trans-supersonic wind tunnel |
| CN206378267U (en) * | 2016-12-02 | 2017-08-04 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of Mach number governor motion suitable for transonic and supersonic wind tunnel |
| CN108181080A (en) * | 2017-12-29 | 2018-06-19 | 中国航天空气动力技术研究院 | A kind of sub- position feedback and protective device across super wind-tunnel diffuser adjustment sheet |
-
2020
- 2020-12-29 CN CN202011595077.XA patent/CN112504612A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1198990A (en) * | 1966-12-01 | 1970-07-15 | British Aircraft Corp Ltd | Improvements relating to Wind-Tunnels |
| RU2460892C1 (en) * | 2011-04-29 | 2012-09-10 | Открытое акционерное общество "ОКБ Сухого" | Method of adjusting supersonic air intake |
| CN106525381A (en) * | 2016-12-02 | 2017-03-22 | 中国航空工业集团公司沈阳空气动力研究所 | Mach number adjusting mechanism suitable for trans-supersonic wind tunnel |
| CN206378267U (en) * | 2016-12-02 | 2017-08-04 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of Mach number governor motion suitable for transonic and supersonic wind tunnel |
| CN108181080A (en) * | 2017-12-29 | 2018-06-19 | 中国航天空气动力技术研究院 | A kind of sub- position feedback and protective device across super wind-tunnel diffuser adjustment sheet |
Non-Patent Citations (1)
| Title |
|---|
| 陈建兵等: "0.3m风洞第二喉道结构设计与分析", 《机械设计》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945509A (en) * | 2021-04-22 | 2021-06-11 | 中国空气动力研究与发展中心超高速空气动力研究所 | Opening plugging device for contraction section of hypersonic speed wind tunnel diffuser |
| CN113701984A (en) * | 2021-10-28 | 2021-11-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel diffuser and design method thereof |
| CN113701984B (en) * | 2021-10-28 | 2022-01-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Hypersonic wind tunnel diffuser and design method thereof |
| CN114739714A (en) * | 2022-05-07 | 2022-07-12 | 上海金脉汽车电子有限公司 | Testing device and method for air-heating PTC product |
| CN115371939B (en) * | 2022-08-09 | 2023-03-28 | 中国航空工业集团公司哈尔滨空气动力研究所 | Section adjustable low-speed wind tunnel test section |
| CN115371939A (en) * | 2022-08-09 | 2022-11-22 | 中国航空工业集团公司哈尔滨空气动力研究所 | Low-speed wind tunnel test section with adjustable section |
| CN115096541B (en) * | 2022-08-26 | 2022-11-15 | 中国航空工业集团公司沈阳空气动力研究所 | Sealing mechanism between wall plates of wind tunnel test section |
| CN115096541A (en) * | 2022-08-26 | 2022-09-23 | 中国航空工业集团公司沈阳空气动力研究所 | Sealing mechanism between wall plates of wind tunnel test section |
| CN115326346A (en) * | 2022-10-18 | 2022-11-11 | 中国航空工业集团公司哈尔滨空气动力研究所 | Easily-adjusted convertible side wall structure for closed test section |
| CN115326346B (en) * | 2022-10-18 | 2023-01-24 | 中国航空工业集团公司哈尔滨空气动力研究所 | Easily-adjusted convertible side wall structure for closed test section |
| CN115392062A (en) * | 2022-10-28 | 2022-11-25 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Supersonic velocity diffusion section design method |
| CN115493795A (en) * | 2022-11-16 | 2022-12-20 | 中国航空工业集团公司沈阳空气动力研究所 | Variable-angle mechanism multi-profile dynamic sealing device and using method |
| CN116519255A (en) * | 2023-03-13 | 2023-08-01 | 中国航空工业集团公司沈阳空气动力研究所 | Mach number accurate control system and method for continuous transonic wind tunnel |
| CN116519255B (en) * | 2023-03-13 | 2023-09-08 | 中国航空工业集团公司沈阳空气动力研究所 | Mach number accurate control system and method for continuous transonic wind tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112504612A (en) | Two-throat real-time adjustable super-expanding section | |
| CN107191273B (en) | A kind of continuously adjustable air intake duct and control method of rigid/flexible combination adjusting | |
| CN104632411B (en) | Binary is used to become the interior rider type turbine base assembly power air intake duct of geometric ways | |
| CN103939217B (en) | Rectangular cross-section hypersonic change geometry intake duct and design method and working method | |
| CN107023395A (en) | The supersonic aircraft air intake duct and adjusting method of a kind of adjustable throat area | |
| CN111255569B (en) | Mode conversion and variable geometry combined adjusting internal parallel type air inlet and control method | |
| CN104483093A (en) | Variable mach number transonic rigid free jet nozzle | |
| CN105971733B (en) | A kind of closed structure changes Two Dimensional Supersonic air intake duct | |
| CN210834083U (en) | Intelligent wind tunnel with variable cross section of test section | |
| CN110500199A (en) | A kind of venturi and the adjustable two-dimensional nozzle regulating device of discharge area | |
| CN103487229A (en) | Trisonics wind tunnel test section expansion angle adjusting mechanism | |
| CN212337458U (en) | Three-dimensional inner rotation damping expansion wave high-performance double-channel TBCC air inlet | |
| CN204008059U (en) | A kind of space tight type low speed environments flow tunnel testing device | |
| CN201695150U (en) | Composite weft insertion mechanism for pipeline-fin type jet loom | |
| CN110566674B (en) | Novel pressure regulating amortization valve | |
| CN209247361U (en) | A kind of experimental rig that can adjust Sidewall-compression inlet contract ratio in real time | |
| CN116735141A (en) | Valve group of direct-current temporary flushing blowing type hypersonic wind tunnel and working method | |
| CN115289499B (en) | Hollow support plate of gas inlet of combustion chamber of gas turbine | |
| CN103016425A (en) | Three-level multi-spray-pipe central ejector | |
| CN207064317U (en) | Slow-speed of revolution centrifugal pump | |
| CN214741686U (en) | Wide-speed-range air inlet channel based on double-incidence bending shock wave | |
| CN204964164U (en) | Mine ventilation network system experimental apparatus | |
| CN209372354U (en) | A kind of direct current suction gust wind tunnel with drainage section | |
| CN113833683A (en) | Double-fan series air supply unit with high space utilization rate | |
| CN208870846U (en) | A kind of quick assembling turbocharger tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |