CN110220665A - A kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve - Google Patents
A kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve Download PDFInfo
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- CN110220665A CN110220665A CN201910546315.9A CN201910546315A CN110220665A CN 110220665 A CN110220665 A CN 110220665A CN 201910546315 A CN201910546315 A CN 201910546315A CN 110220665 A CN110220665 A CN 110220665A
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- 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
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve, it is therefore an objective to protect lower range survey pressure scanning valve not by the wind equipment damage caused by wide open pressure oscillation when cut-offfing while realize the accurate measurement of tested modal pressure；The vehicle stage is switched in wind-tunnel; control by controlling gas circuit pushes needle-valve; so that needle-valve is in calibration terminal; realize that surveying pressure scanning valve to lower range protects; in the Flow Field in Wind Tunnel stabilization sub stage; control by controlling gas circuit pushes needle-valve, so that needle-valve is in measurement end, realizes the accurate measurement of tested modal pressure；The present invention compares traditional scanning valve protection system; expensive dedicated protective device and equipment are not needed; it only needs to add air-operated solenoid valve and lower range absolute pressure sensor; the accurate measurement of tested modal pressure is also achieved while realizing the safeguard protection of scanning valve; guard method is simple and efficient, time saving and energy saving；Have the characteristics that easy to operate, reliable for operation, high-efficient.
Description
Technical field
The invention belongs to aerodynamics wind-tunnel technique fields, and in particular to temporarily rush the survey of formula supersonic wind tunnel lower range
The method for security protection of pressure scanning valve surveys the safeguard protection of pressure scanning valve to lower range when suitable for wind tunnel pressure measuring test.
Background technique
Manometric test is the important content of wind tunnel test, it is therefore an objective to the pressure by measuring dummy vehicle surface is distributed,
The initial data of aerodynamic loading is provided for aircraft and modular construction Strength co-mputation, is the pneumatic spy of exploratory flight device and its component
Property and exploratory flight device Characteristics of Flow Around provide foundation, while be also verifying the whether accurate important hand of numerical computation method
Section.Currently, wind tunnel pressure measuring test passes through pressure tap and pressure-measuring pipe road handle mainly using the method for laying pressure tap in model surface
Model surface pressure is transmitted to pressure sensor to measure.Electronic scanner pressure measuring system be wind tunnel test commonly survey pressure set
It is standby, it can be achieved that multipoint pressure acquisition and processing, have measuring point quantity is more, scanning speed is fast, measurement precision height etc. protrude it is excellent
Point, wherein scanning valve is the core equipment in electronic scanner pressure measuring system, measures obtained pressure value and is measurement end and surveys
Measure the pressure difference between reference end.In addition, scanning valve is a kind of pressure scanner of multi-channel high-accuracy, by multiple silicon piezoresistance types
Differential pressure pick-up composition, silicon pressure sensor are connected on Wheatstone bridge using varistor, the voltage output direct ratio of generation
It is inputted in pressure, the analog signal of acquisition is by amplifier, the multicircuit switch inside scanning valve, with the side of Binary coded addressing
Formula establishes channel relationship, and then realizes the acquisition of multipoint pressure data.
In wind tunnel pressure measuring test at present, generated in order to avoid temporarily rushing formula supersonic wind tunnel transient impact when starting and cut-offfing
Destruction of the biggish pressure oscillation to scanning valve, when pressure scanning valve is surveyed in selection, reserved a certain amount journey surplus makes its measurement
Range is greater than pressure value of the wind-tunnel when starting and cut-offfing, that is, selects the scanning valve of high range, if range is sweeping for ± 45psid
Valve is retouched, measurement reference end can be directly accessed the standard atmospheric pressure of 101.325kPa, and the scanning measurable pressure limit of valve reaches
± 310.275kPa, higher than the wind-tunnel biggish pressure oscillation that transient impact generates when starting and cut-offfing.But it is close in sonic boom
In the manometric tests such as field measurement, pressure oscillation during the absolute pressure value of pressure measuring model is subatmospheric and entire wind tunnel test
It is smaller, in order to guarantee survey pressure precision, it is necessary to select lower range survey press scanning valve, as range be ± 5psid, ± 1psid and
The survey pressure scanning valve of ± 0.5psid.And use the survey pressure scanning valve of lower range that can encounter following two problem, first is that wind-tunnel starts
It is greater than the range ability that lower range surveys pressure scanning valve with pressure value when cut-offfing, will lead to the damage for surveying pressure scanning valve, second is that wind
When hole is tested, the difference on pressure measuring model between the pressure value and atmospheric pressure of pressure tap is greater than the range that lower range surveys pressure scanning valve
Range causes the measurement reference end for surveying pressure scanning valve that can not be directly accessed atmospheric pressure.Due to the presence of both problems, cause low
Range is surveyed pressure scanning valve and must targetedly be protected in manometric test, to prevent pressure value beyond scanning valve range model
It encloses and leads to the damage for scanning valve.
Summary of the invention
In view of the problems of the existing technology the present invention, provides a kind of easy to operate, applied widely, practical temporary
The method for security protection that formula supersonic wind tunnel lower range surveys pressure scanning valve is rushed, there are two purposes for tool:
Firstly, solving pressure value when wind-tunnel is started and cut-off is greater than the range ability that lower range surveys pressure scanning valve, survey will lead to
The problem of damage of pressure scanning valve；
Pressure scanning valve is surveyed secondly, solving the difference on pressure measuring model between the pressure value and atmospheric pressure of pressure tap and being greater than lower range
Range ability causes to survey the problem of pressing the measurement reference end of scanning valve that can not be directly accessed atmospheric pressure.
In order to solve first problem, this programme is adopted the following technical scheme that
It is a kind of temporarily rush formula supersonic wind tunnel lower range survey pressure scanning valve method for security protection, the scanning valve have measurement end with
Calibration terminal, for the scanning valve under the varying environment of wind-tunnel, the control by controlling gas circuit pushes needle-valve, surveys so that needle-valve is in
End or calibration terminal are measured, is protected to realize and survey pressure scanning valve to lower range.
On the basis of solving first problem, propose that further scheme solves Second Problem, using following technical side
Case:
Tested model is set in wind-tunnel, several pressure taps are provided on the tested model, one of pressure tap is as ginseng
Measurement reference end and air-operated solenoid valve that pressure tap is connected respectively to scanning valve by tracheae are examined, the other end of air-operated solenoid valve is logical
It crosses lower range absolute pressure sensor and is connected to the acquisition of survey pressure and control system, other pressure taps being tested on model pass through tracheae respectively
It is connected to the measurement end of scanning valve, the calibration terminal of the scanning valve is connected to atmospheric pressure, and the control air circuit connection for scanning valve arrives
Standard controls gas source.
It is the true absolute pressure of the measurement reference end of measurement scanning valve that the present invention, which uses the purpose of lower range absolute pressure sensor,
Value, the data that scanning valve measures in the operating condition are the relative value of measurement end and measurement reference end, therefore to obtain tested mould
The true pressure value of each measurement point of type is just needed using the lower range absolute pressure sensor in the present invention, lower range absolute pressure sensing
Device refers to that range is less than the sensor of standard atmospheric pressure 101.325kPa.
The present invention is protection lower range absolute pressure sensor using the purpose of air-operated solenoid valve, because of lower range absolute pressure sensor
Range be less than standard atmospheric pressure, therefore lower range absolute pressure sensor cannot directly access atmospheric pressure.Wind-tunnel starting and
It is exactly to protect lower range absolute pressure sensor that the main purpose of air-operated solenoid valve is closed when cut-offfing.
Further, on the basis of above scheme, using following process:
In wind-tunnel starting, air-operated solenoid valve is closed, blocks the gas circuit of lower range absolute pressure sensor to protect lower range absolute pressure
Sensor shifts the needle-valve for scanning valve onto calibration terminal using the control gas circuit of scanning valve, scans the measurement end of valve at this time by valve body
Sealing, in calibration mode, the pressure difference measured is the pressure difference between calibration terminal and calibration reference end, the pressure for scanning valve work
Power difference is zero, and lower range is surveyed pressure scanning valve and protected；
When Flow Field in Wind Tunnel is stablized, the measurement gas circuit that air-operated solenoid valve connects lower range absolute pressure sensor is opened, utilizes scanning valve
Control gas circuit shift the needle-valve for scanning valve onto measurement end, scan valve work at this time in measurement pattern, measured value be measurement end with
The pressure difference between reference end is measured, the true pressure value for being tested pressure tap on model is the measured value and lower range for scanning valve
The sum of measured value of absolute pressure sensor；
When wind-tunnel cut-offs, air-operated solenoid valve is closed, blocks the gas circuit of lower range absolute pressure sensor to protect lower range absolute pressure
Sensor shifts the needle-valve for scanning valve onto calibration terminal using the control gas circuit of scanning valve, scans the measurement end of valve at this time by valve body
Sealing, in calibration mode, the pressure difference measured is the pressure difference between calibration terminal and calibration reference end, the pressure for scanning valve work
Power difference is zero, and lower range is surveyed pressure scanning valve and protected.
In the above-mentioned technical solutions, described that scanning valve and air-powered electromagnetic are connected to by three-way connector with reference to pressure tap
Valve.
In the above-mentioned technical solutions, the calibration terminal of the scanning valve is connected to the external atmospheric pressure of wind tunnel by tracheae.
In the above-mentioned technical solutions, being connected to the external atmospheric pressure of wind tunnel further includes calibration reference end.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
Compared to traditional scanning valve protection system, the present invention does not need expensive dedicated protective device and equipment, only needs
Add air-operated solenoid valve and lower range absolute pressure sensor；Guard method is simple and efficient, time saving and energy saving；
Lower range of the invention survey pressure scanning valve method for security protection be make full use of scanning valve itself push away valve function, have
The features such as easy to operate, reliable for operation, high-efficient.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 temporarily rushes the theory of constitution figure that formula supersonic wind tunnel lower range surveys pressure scanning valve safeguard protection；
Fig. 2 is the wind tunnel test timing diagram that lower range of the present invention surveys pressure scanning valve method for security protection；
Wherein: 1 is pressure measuring model, and 2 be pressure tap, and 3 be measuring point Ref, and 4 be to survey pressure gas channel pipe, and 5 be three-way connection, and 6 be pneumatic electricity
Magnet valve, 7 be lower range absolute pressure sensor, and 8 be to survey pressure scanning valve, and 9 be cable, and 10 be atmospheric pressure, and 11 be standard control gas source,
12 be acquisition and control system.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.
It is the system schematic of the present embodiment as shown in Fig. 1, including tested model, several surveys being arranged on tested model
Hole is pressed, one of pressure tap, which is used as, refers to pressure tap, and the measurement surveyed on pressure scanning valve is connected respectively to by three-port structure and is joined
Examine one end of end and air-operated solenoid valve, the other end of air-operated solenoid valve by lower range absolute pressure sensor be connected to the acquisition of survey pressure with
In control system.Other pressure taps of tested model pass sequentially through tracheae and are connected in the measurement end surveyed and pressed on scanning valve, survey pressure
Calibration terminal on scanning valve is connected to the external atmospheric pressure of wind tunnel, and it is external that the calibration reference end for scanning valve is connected to wind tunnel
Atmospheric pressure, the control air circuit connection of valve will be scanned to surveying pressure acquisition and control gas source with the standard in control system.
Specific implementation process are as follows:
It shares the manometric modules of 15 ± 5psid ranges assuming that certain temporarily rushes formula supersonic wind tunnel (each manometric module has 64 pressures
Power measurement point), when a certain manometric test, pressure tap number is 630 points on model.
It temporarily rushes formula supersonic wind tunnel lower range and surveys the method for security protection of pressure scanning valve, as shown in Fig. 2, including following step
It is rapid:
Step 1: pressing demand according to the survey that this tests at 630 points, 10 manometric modules are selected from 15 manometric modules, are constructed
Currently with 640 points survey pressure energy power electronic scanner pressure measuring systems；
Step 2: selecting a measuring point Ref as pressure reference point in 630 each pressure taps on pressure measuring model, it is coupled to
The end A of three-way connection, the B of three-way connection terminate the measurement reference end RRef into 10 scanning valves used, and the C-terminal of three-way connection connects
It is connected to one end of air-operated solenoid valve, the other end of air-operated solenoid valve is connected to lower range absolute pressure sensor；Scanning valve is PSI company
ESP-64, range be ± 5psid, air-operated solenoid valve be SMC VT307-5G-01, lower range absolute pressure sensor be Mensor
CPT6100；
Step 2: remaining 629 pressure tap for removing measuring point Ref on pressure measuring model to be sequentially ingressed into the measurement end of scanning valve；
Step 3: control the gas circuit C1 and C2 of 10 scanning valves used are all connected to survey pressure acquisition and the standard in control system
Control gas source；The calibration terminal of 10 scanning valves used is all connected to the external atmospheric pressure of wind tunnel, by 10 scanning valves used
Calibration reference end be connected to the external atmospheric pressure of wind tunnel；
Step 4: lower range absolute pressure sensor is connected in acquisition and control system, air-operated solenoid valve is connected to number
According in acquisition and control system；
Step 5: closing air-operated solenoid valve in wind-tunnel starting, block the gas circuit of lower range absolute pressure sensor to protect low amounts
Journey absolute pressure sensor；Using the control gas circuit of scanning valve, 10 scanning valves used are all pushed away into valve to calibration terminal, it is all at this time to sweep
The measurement end of valve is retouched by valve seal, scans valve work in calibration mode, the pressure difference measured is that calibration terminal and calibration are joined
The pressure difference between end is examined, the pressure difference is substantially zeroed, and scanning valve is protected；
Step 6: opening the measurement gas circuit that air-operated solenoid valve connects lower range absolute pressure sensor when Flow Field in Wind Tunnel is stablized；It utilizes
10 scanning valves used are all pushed away valve to measurement end by the control gas circuit for scanning valve, and all scanning valves work in measurement mould at this time
Formula, measured value is measurement end and measures the pressure difference between reference end, and the true pressure value of pressure tap is and sweeps on pressure measuring model
Retouch the measured value of valve and the sum of the measured value of lower range absolute pressure sensor；
Step 7: closing air-operated solenoid valve when wind-tunnel cut-offs, block the gas circuit of lower range absolute pressure sensor to protect low amounts
Journey absolute pressure sensor；Using the control gas circuit of scanning valve, 10 scanning valves used are all pushed away into valve to calibration terminal, scan valve at this time
Measurement end by valve seal, all scanning valves work in calibration mode, the pressure difference measured be calibration terminal and calibration join
The pressure difference between end is examined, the pressure difference is substantially zeroed, and scanning valve is protected.
To sum up, the present invention pushes away valve function using scanning valve itself, is passed by addition air-operated solenoid valve and lower range absolute pressure
Sensor also ensures tested model pressure realizing temporarily to rush while formula supersonic wind tunnel lower range surveys the safeguard protection of pressure scanning valve
The accurate measurement of power, the guard method have the characteristics that easy to operate, reliable for operation, high-efficient
The invention is not limited to specific embodiments above-mentioned.The present invention expands to any new spy disclosed in the present specification
Sign or any new combination, and disclose any new method or process the step of or any new combination.
Claims (7)
1. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve, the scanning valve have measurement end
And calibration terminal, it is characterised in that for the scanning valve under the varying environment of wind-tunnel, the control by controlling gas circuit pushes needle-valve, makes
It obtains needle-valve and is in measurement end or calibration terminal, realize that surveying pressure scanning valve to lower range protects.
2. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 1,
It is characterized by comprising the tested model being arranged in wind-tunnel, several pressure taps are provided on the tested model, one of them
Pressure tap is as measurement reference end and the air-operated solenoid valve for being connected respectively to scanning valve by tracheae with reference to pressure tap, air-powered electromagnetic
The other end of valve is connected to the acquisition of survey pressure and control system, other pressure taps being tested on model by lower range absolute pressure sensor
The measurement end of scanning valve is connected respectively to by tracheae, the calibration terminal of the scanning valve is connected to atmospheric pressure, scans the control of valve
Air circuit connection processed controls gas source to standard.
3. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 2,
It is characterized in that the lower range absolute pressure sensor is used to measure the pressure value of scanning valve reference end.
4. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 2,
It is characterized in that the detailed process of guard method are as follows:
In wind-tunnel starting, air-operated solenoid valve is closed, blocks the gas circuit of lower range absolute pressure sensor to protect lower range absolute pressure
Sensor shifts the needle-valve for scanning valve onto calibration terminal using the control gas circuit of scanning valve, scans the measurement end of valve at this time by valve body
Sealing, in calibration mode, the pressure difference measured is the pressure difference between calibration terminal and calibration reference end, the pressure for scanning valve work
Power difference is zero, and lower range is surveyed pressure scanning valve and protected；
When Flow Field in Wind Tunnel is stablized, the measurement gas circuit that air-operated solenoid valve connects lower range absolute pressure sensor is opened, utilizes scanning valve
Control gas circuit shift the needle-valve for scanning valve onto measurement end, scan valve work at this time in measurement pattern, measured value be measurement end with
The pressure difference between reference end is measured, the true pressure value for being tested pressure tap on model is the measured value and lower range for scanning valve
The sum of measured value of absolute pressure sensor；
When wind-tunnel cut-offs, air-operated solenoid valve is closed, blocks the gas circuit of lower range absolute pressure sensor to protect lower range absolute pressure
Sensor shifts the needle-valve for scanning valve onto calibration terminal using the control gas circuit of scanning valve, scans the measurement end of valve at this time by valve body
Sealing, in calibration mode, the pressure difference measured is the pressure difference between calibration terminal and calibration reference end, the pressure for scanning valve work
Power difference is zero, and lower range is surveyed pressure scanning valve and protected.
5. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 4,
It is characterized in that described be connected to scanning valve and air-operated solenoid valve by three-way connector with reference to pressure tap.
6. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 4,
It is characterized in that the calibration terminal of the scanning valve is connected to the external atmospheric pressure of wind tunnel by tracheae.
7. a kind of method for security protection for temporarily rushing formula supersonic wind tunnel lower range and surveying pressure scanning valve according to claim 6,
It is characterized in that being connected to the external atmospheric pressure of wind tunnel further includes calibration reference end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910546315.9A CN110220665B (en) | 2019-06-24 | 2019-06-24 | Safety protection method for temporary-impulse type supersonic wind tunnel low-range pressure measurement scanning valve |
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| CN201910546315.9A CN110220665B (en) | 2019-06-24 | 2019-06-24 | Safety protection method for temporary-impulse type supersonic wind tunnel low-range pressure measurement scanning valve |
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| CN110220665B CN110220665B (en) | 2020-11-06 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686858A (en) * | 2019-11-07 | 2020-01-14 | 中国空气动力研究与发展中心 | Sound explosion measurement wind tunnel test data processing method |
| CN111238759A (en) * | 2020-03-31 | 2020-06-05 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel pressure measurement test method |
| CN112113740A (en) * | 2020-11-18 | 2020-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN112461489A (en) * | 2020-11-25 | 2021-03-09 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve reference pressure control system for low-pressure measurement and application method |
| CN113010969A (en) * | 2021-05-11 | 2021-06-22 | 中国空气动力研究与发展中心计算空气动力研究所 | Calculation and correction method for maximum value of pressure wave of high-speed train entering tunnel |
| CN114791330A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Multichannel pressure scanning valve system |
| CN117147092A (en) * | 2023-10-30 | 2023-12-01 | 中国航空工业集团公司沈阳空气动力研究所 | Ultrasonic static pressure probe-based acoustic explosion near-field space pressure measurement device |
| CN117147093A (en) * | 2023-10-30 | 2023-12-01 | 中国航空工业集团公司沈阳空气动力研究所 | Wind tunnel test measuring device for acoustic explosion characteristics of low acoustic explosion supersonic civil aircraft |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063620A (en) * | 2016-12-29 | 2017-08-18 | 中国航天空气动力技术研究院 | Wind-tunnel total pressure measurement transducer range automatic switching control equipment |
-
2019
- 2019-06-24 CN CN201910546315.9A patent/CN110220665B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063620A (en) * | 2016-12-29 | 2017-08-18 | 中国航天空气动力技术研究院 | Wind-tunnel total pressure measurement transducer range automatic switching control equipment |
Non-Patent Citations (1)
| Title |
|---|
| 谢飞 等: "高超声速风洞试验模型底压测量方法研究", 《实验流体力学》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686858B (en) * | 2019-11-07 | 2021-02-26 | 中国空气动力研究与发展中心 | Sound explosion measurement wind tunnel test data processing method |
| CN110686858A (en) * | 2019-11-07 | 2020-01-14 | 中国空气动力研究与发展中心 | Sound explosion measurement wind tunnel test data processing method |
| CN111238759B (en) * | 2020-03-31 | 2021-07-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel pressure measurement test method |
| CN111238759A (en) * | 2020-03-31 | 2020-06-05 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel pressure measurement test method |
| CN112113740A (en) * | 2020-11-18 | 2020-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN112113740B (en) * | 2020-11-18 | 2021-02-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN112461489B (en) * | 2020-11-25 | 2022-09-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve reference pressure control system for low-pressure measurement and application method |
| CN112461489A (en) * | 2020-11-25 | 2021-03-09 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve reference pressure control system for low-pressure measurement and application method |
| CN113010969A (en) * | 2021-05-11 | 2021-06-22 | 中国空气动力研究与发展中心计算空气动力研究所 | Calculation and correction method for maximum value of pressure wave of high-speed train entering tunnel |
| CN114791330A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Multichannel pressure scanning valve system |
| CN117147092A (en) * | 2023-10-30 | 2023-12-01 | 中国航空工业集团公司沈阳空气动力研究所 | Ultrasonic static pressure probe-based acoustic explosion near-field space pressure measurement device |
| CN117147093A (en) * | 2023-10-30 | 2023-12-01 | 中国航空工业集团公司沈阳空气动力研究所 | Wind tunnel test measuring device for acoustic explosion characteristics of low acoustic explosion supersonic civil aircraft |
| CN117147093B (en) * | 2023-10-30 | 2024-01-23 | 中国航空工业集团公司沈阳空气动力研究所 | Wind tunnel test measuring device for acoustic explosion characteristics of low acoustic explosion supersonic civil aircraft |
| CN117147092B (en) * | 2023-10-30 | 2024-01-23 | 中国航空工业集团公司沈阳空气动力研究所 | Ultrasonic static pressure probe-based acoustic explosion near-field space pressure measurement device |
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