CN108803709A - A kind of anti-icing wall static pressure measurement control structure - Google Patents
A kind of anti-icing wall static pressure measurement control structure Download PDFInfo
- Publication number
- CN108803709A CN108803709A CN201810325276.5A CN201810325276A CN108803709A CN 108803709 A CN108803709 A CN 108803709A CN 201810325276 A CN201810325276 A CN 201810325276A CN 108803709 A CN108803709 A CN 108803709A
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- hole
- calandria
- wall
- static pressure
- icing
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- 230000003068 static effect Effects 0.000 title claims abstract description 55
- 238000009530 blood pressure measurement Methods 0.000 title abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 13
- 238000005259 measurement Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000013526 supercooled liquid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses a kind of anti-icing wall static pressures to measure control structure, connecting flange including calandria and for fixing calandria, normal is provided with through-hole on wind tunnel wall, the threaded hole for being fixedly connected with flange is provided in the wind-tunnel outer hole wall of through-hole surrounding, the calandria is inserted in the through-hole in connecting flange and being inserted on the wall of hole；Several holes are axially set in the calandria, and one of hole is through-hole, for being inserted into static tube, in other holes is used to that heater strip and temperature sensor to be arranged；The wall static pressure measurement structure of the present invention is simple, and calandria is easy for installation in hole wall, and static pressure hole periphery, static tube have the anti-icing function of electrical heating, not the risk of ice blockage, and static pressure measurement precision is high；Calandria Cryocooler Temperature Closed Loop Control System based on pressure regulator, temperature controller and solid-state relay, heating voltage step-less adjustment, heating temperature are arbitrarily set, and meet the anti-icing needs of static tube, and stable and safe in operation is cost-effective.
Description
Technical field
The present invention relates to wind tunnel test fields, and control structure is measured more particularly, to a kind of anti-icing wall static pressure.
Background technology
In aerodynamics, the speed of related movement between air-flow and object generally will be by the pressure for measuring air-flow
The flow parameters such as strong and temperature can be determined by calculating again.In low-speed wind tunnel test, it is necessary to the remote front incoming of measurement model
Speed, if model front install Pitot-static tube, will produce the Aerodynamic intenference between Pitot-static tube and model, influence wind
The accuracy of measurement of speed and model-test data.When low-speed wind tunnel test, generally use pressure drop method measures test section wind
Speed opens static pressure hole on the interior hole wall surface of the downstream section I and test section inlet section II of wind-tunnel stable section honeycomb, surveys
The static pressure P1 and P2 for going out them, according to Bernoulli equation, the dynamic pressure of static pressure difference and test section air-flow between section I and section II
Between there are certain proportionate relationship, test section air velocity can be calculated by introducing correction term.Fly in aerospace
Also there is same static pressure trepanning on row device surface, for measuring flying speed.
By taking low-speed wind tunnel as an example, in low-speed wind tunnel, wind-tunnel wall static pressure usually in wind-tunnel hole wall surface along normal side
Experience the static pressure of the position to an aperture is opened, pressure measurement bore dia is generally within the scope of 0.5mm~2mm, hole depth and aperture ratio
More than 2 or more, the axis of pressure tap is vertical with wall surface, hole inner wall smooth, aperture impulse- free robustness or chamfering, the object plane light near aperture
It slides without pit or projection, pressure tap and the smooth no scale of wind-tunnel internal face, you can accurately measure the local static pressure.This method
Smaller to the disturbance of air-flow, accuracy of measurement is high, simple and convenient, is widely used in aerodynamics experiment.
It is different to be in room temperature, atmospheric pressure environment from other low-speed wind tunnels, in icing wind tunnel hole the lowest temperature to subzero 40 DEG C, it is empty
Air humidity degree to 100%, highest can simulate 2 meters altitude 5kPa ambient pressures, have spraying system to simulate cloud parameter in wind-tunnel.Wind
When hole is tested, successively start according to dynamical system, refrigeration system and altitude simulation systematic order, when hole interior air-flow speed, total temperature,
Air pressure reaches experimental condition in hole, according to setting open the corresponding nozzle of spraying system, certain content, grain size supercooled liquid water
Drop strikes test section internal face with air-flow, is easy to freeze in wind-tunnel internal face frosting, may block wind-tunnel internal face millimeter amount
The pressure tap of grade, leads to not accurately measure the local static pressure, directly affects wind tunnel test safe and stable operation.Other aviations
There is also same problems for aerospace craft wall static pressure measured hole.
To avoid wall static pressure hole ice blockage from influencing accurate measurement static pressure, it is necessary to improve wall static pressure measurement structure and control
Set up meter.
Invention content
The purpose of the present invention is on the basis of existing technology, proposing that a kind of anti-icing wall static pressure measures control structure, with
Solve wind tunnel test or when aerospace flight vehicle flight, certain content, grain size supercooled liquid water droplet strike examination with air-flow
It tests section internal face frosting to freeze, blocks measured hole and can not accurately measure the defect of the static pressure.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of anti-icing wall static pressure measurement control structure, including calandria and the connecting flange for fixing calandria, in wind-tunnel
Normal is provided with through-hole on the wall of hole, the threaded hole for being fixedly connected with flange is provided in the wind-tunnel outer hole wall of through-hole surrounding,
The calandria is inserted in the through-hole in connecting flange and being inserted on the wall of hole；Several holes are axially set in the calandria,
One of hole is through-hole, for being inserted into static tube, in other holes is used to that heater strip and temperature sensor to be arranged.
In the above-mentioned technical solutions, the connecting flange is provided with several adjusting nuts along radial, for adjusting heating
Relative position of the body in connecting flange axially.
In the above-mentioned technical solutions, the end face integral cutting of static tube one end and calandria in through-hole, the other end
Taper connector is welded, for connecting external static pressure conduit.
In the above-mentioned technical solutions, the outer diameter of the static tube and the internal diameter of through-hole are consistent, the static tube not edge in through-hole
It and slides axially.
In the above-mentioned technical solutions, the static tube inner wall smooth, aperture impulse- free robustness or chamfering.
In the above-mentioned technical solutions, the heater strip is connect with external heating power supply conducting wire, the hole of heater strip and calandria
Insulating layer is filled between gap so that heater strip is integral with calandria.
In the above-mentioned technical solutions, the temperature sensor is connect with external temperature controller, temperature sensor and calandria
Hole between fill insulating layer so that temperature sensor is integral with calandria.
In the above-mentioned technical solutions, temperature sensor and heater strip and the driving power outside calandria, pressure regulator, open circuit
Device and solid-state relay constitute electric-heating control system.
In the above-mentioned technical solutions, the course of work of the electric-heating control system is：
When temperature feedback is less than set temperature, temperature controller output switching signal connects driving power, and triggering solid-state relay is connected,
Electrical heating major loop is closed, and calandria is begun to warm up；
When temperature feedback is higher than set temperature, temperature controller output switching signal disconnects driving power, and triggering solid-state relay is disconnected
It opens, electrical heating major loop disconnects, and calandria stops heating.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The wall static pressure measurement structure of the present invention is simple, and calandria is easy for installation in hole wall, and static pressure hole periphery, static tube have electricity
Anti-icing function is heated, not the risk of ice blockage, static pressure measurement precision is high；Based on pressure regulator, temperature controller and solid-state relay
Calandria Cryocooler Temperature Closed Loop Control System, heating voltage step-less adjustment, heating temperature arbitrarily sets, and meets the anti-icing need of static tube
It wants, stable and safe in operation is cost-effective.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is wall static pressure measurement structural representation；
Fig. 2 is calandria electric heating control functional block diagram；
Wherein：1 is hole wall, and 2 be hole wall inner surface, and 3 be the outer surfaces Dong Bi, and 4 be hole wall trepanning, and 5 be hole wall mounting screw wire hole,
6 be flange axial direction mounting screw through-hole, and 7 be calandria, and 8 be static pressure hole, and 9 be flange, and 10 be flange radially installed screw wire hole,
11 be temperature sensor, and 12 be heating power supply conducting wire, and 13 be static tube, and 14 be static pressure conduit, and 15 be heating power supply, and 16 be open circuit
Device, 17 be pressure regulator, and 18 be temperature controller, and 19 be driving power, and 20 be solid-state relay.
Specific implementation mode
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.
As shown in Figure 1, the present invention is when implementing, first along the normal direction trepanning of wind tunnel wall, the aperture of trepanning is wanted
It is consistent with the outer diameter of calandria.Then in the outer hole wall of wind-tunnel, a certain number of installation screws are designed along the surrounding of trepanning
Hole, the depth of screw hole is no more than hole wall thickness, and for being fixedly connected with flange, connecting flange can pass through calandria,
Therefore calandria passes through the trepanning on connecting flange and wind tunnel wall, and is connected flange and is fixed as one.
Calandria uses column or other strip structures, calandria to be axially provided with multiple counterbores, one of hole
It is through-hole, dedicated for static tube is arranged in hole, and other counterbores are respectively used to installation heater strip and temperature sensor.In order to
Calandria is adjusted in the installation site of wind tunnel wall, several adjusting nuts are arranged using the radial direction in connecting flange, work as calandria
When being moved axially in connecting flange, the relative position of calandria is locked by adjusting nut.
Electric-heating control system in the present invention is by incoming power, breaker, pressure regulator, solid-state relay, temperature controller, drive
The compositions such as dynamic power supply；In the counterbore of calandria, partial counter bore is filled for installing heater strip between heater strip and calandria
Megohmite insulant so that with calandria at an entirety, heater strip outside connect with power supply, carried out to calandria after energization heater strip
Heating.Because being different from the flight of actual airplane in wind tunnel test, the flight of actual airplane is because air-flow can take away the heat on surface
Amount, and once stopping experiment in wind-tunnel, the temperature of model surface would not be pulled away, it is therefore desirable to be controlled temperature.?
It is provided with temperature sensor in partial counter bore, is also filled with megohmite insulant between temperature sensor and calandria, avoids air
In the presence of so that the temperature of calandria can accurately be obtained.Temperature sensor is connected to by temperature controller on heating power supply.
As shown in Fig. 2, being the circuit diagram of control system, incoming power can select single-phase or three-phase according to heater strip power
AC power, it is possible to use DC power supply；Pressure regulator exports adjustable safe heating electricity for adjusting heating voltage amplitude
Pressure, control heating speed；Temperature controller heats temperature for monitoring in real time, and according to set temperature and temperature feedback, output is opened
Signal is measured in pass, is switched on or switched off driving power, the solid-state relay conducting and closing in control electrical heating circuit.When temperature feedback is low
When set temperature, temperature controller output switching signal connects driving power, triggering solid-state relay conducting, and electrical heating major loop closes
It closes, calandria is begun to warm up；When temperature feedback is higher than set temperature, temperature controller output switching signal disconnects driving power, touches
It sends out solid-state relay to disconnect, electrical heating major loop disconnects, and calandria stops heating.
Electric heating system can realize the setting of heating temperature, temperature real-time display, electricity with independent operating by temperature controller
Heating temperature closed-loop automatic control, electrical heating major loop have overcurrent, short circuit, creepage protection function.Also temperature controller can be passed through
Network communication is embedded in other automated systems, and electric heating system is made to have local/remote control function.
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. a kind of anti-icing wall static pressure measures control structure, it is characterised in that the connection including calandria and for fixing calandria
Flange is provided with through-hole on wind tunnel wall along normal, and the method for being fixedly connected is provided in the wind-tunnel outer hole wall of through-hole surrounding
Blue threaded hole, the calandria are inserted in the through-hole in connecting flange and being inserted on the wall of hole；It is axially set in the calandria
Several holes are set, one of hole is through-hole, for being inserted into static tube, in other holes is used to that heater strip and temperature sensing to be arranged
Device.
2. a kind of anti-icing wall static pressure according to claim 1 measures control structure, it is characterised in that the connecting flange
Several adjusting nuts are provided with along radial, for adjusting the relative position of calandria in connecting flange axially.
3. a kind of anti-icing wall static pressure according to claim 1 measures control structure, it is characterised in that the static tube exists
The end face integral cutting of one end and calandria in through-hole, the other end welds taper connector, for connecting external static pressure conduit.
4. a kind of anti-icing wall static pressure according to claim 3 measures control structure, it is characterised in that the static tube
Outer diameter is consistent with the internal diameter of through-hole, and static tube does not slide axially in through-hole.
5. a kind of anti-icing wall static pressure according to claim 4 measures control structure, it is characterised in that in the static tube
Wall is smooth, aperture impulse- free robustness or chamfering.
6. a kind of anti-icing wall static pressure according to claim 1 measures control structure, it is characterised in that the heater strip with
The connection of external heating power supply conducting wire, insulating layer is filled between heater strip and the hole of calandria so that heater strip is with calandria
One is whole.
7. a kind of anti-icing wall static pressure according to claim 1 measures control structure, it is characterised in that the temperature sensing
Device connect with external temperature controller, and insulating layer is filled between temperature sensor and the hole of calandria so that temperature sensor and
Calandria is integral.
8. measuring control structure according to a kind of any anti-icing wall static pressure of claim 1,6,7, it is characterised in that temperature
Sensor and heater strip constitute electric heating control with driving power, pressure regulator, breaker and the solid-state relay outside calandria
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810325276.5A CN108803709A (en) | 2018-04-02 | 2018-04-02 | A kind of anti-icing wall static pressure measurement control structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810325276.5A CN108803709A (en) | 2018-04-02 | 2018-04-02 | A kind of anti-icing wall static pressure measurement control structure |
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| Publication Number | Publication Date |
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| CN108803709A true CN108803709A (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810325276.5A Pending CN108803709A (en) | 2018-04-02 | 2018-04-02 | A kind of anti-icing wall static pressure measurement control structure |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074903A (en) * | 2021-03-25 | 2021-07-06 | 中国石油大学胜利学院 | Pressure testing system and method based on blade icing experiment |
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| CN206610182U (en) * | 2017-03-27 | 2017-11-03 | 成都深冷科技有限公司 | A kind of device of control high/low temperature circulation change and constant temperature |
| CN107462362A (en) * | 2016-06-06 | 2017-12-12 | 谢潇君 | One kind can deicing be total, static pressure pick-up |
| CN208156523U (en) * | 2018-04-02 | 2018-11-27 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of anti-icing wall static pressure measurement control structure |
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2018
- 2018-04-02 CN CN201810325276.5A patent/CN108803709A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102141447A (en) * | 2010-12-31 | 2011-08-03 | 中国航天科技集团公司第六研究院第十一研究所 | Total temperature/total pressure and static probe |
| CN103017927A (en) * | 2012-11-28 | 2013-04-03 | 中国商用飞机有限责任公司 | Mounting method for mounting temperature thermocouple on inner surface of skin |
| CN205262520U (en) * | 2015-12-18 | 2016-05-25 | 西安远方航空技术发展总公司 | Combined type stagnation temperature measuring device |
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| CN106248139A (en) * | 2016-07-29 | 2016-12-21 | 成都凯天电子股份有限公司 | Atmosphere parameter measurement is popped one's head in |
| CN206610182U (en) * | 2017-03-27 | 2017-11-03 | 成都深冷科技有限公司 | A kind of device of control high/low temperature circulation change and constant temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074903A (en) * | 2021-03-25 | 2021-07-06 | 中国石油大学胜利学院 | Pressure testing system and method based on blade icing experiment |
| CN113074903B (en) * | 2021-03-25 | 2022-04-22 | 中国石油大学胜利学院 | Pressure testing system and method based on blade icing experiment |
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