CN106441793A - Adjusting method and apparatus of air-flow temperature in calibration wind tunnel - Google Patents
Adjusting method and apparatus of air-flow temperature in calibration wind tunnel Download PDFInfo
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- CN106441793A CN106441793A CN201611033268.0A CN201611033268A CN106441793A CN 106441793 A CN106441793 A CN 106441793A CN 201611033268 A CN201611033268 A CN 201611033268A CN 106441793 A CN106441793 A CN 106441793A
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- flow
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
-
- 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
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
-
- 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
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
Abstract
The invention relates to an adjusting method and apparatus of air-flow temperature in a calibration wind tunnel. The adjusting method includes the following steps: adjusting and controlling the flow velocity of an air-flow in an air inlet segment of a calibration wind tunnel, and generating a first characteristic air-flow; enabling the first characteristic air-flow to pass through a pressure stabilization segment of the calibration wind tunnel, performing pressure stabilization operation on the air-flow, and generating a second characteristic air-flow; enabling the generated second characteristic air-flow to pass through a heating segment of the calibration wind tunnel, and heating the air-flow, controlling the air-flow temperature by adjusting the heating power, and generating a third characteristic air-flow; performing rectification operation on the generated third characteristic air-flow through a rectification segment of the calibration wind tunnel, and generating a fourth characteristic air-flow; and enabling the fourth characteristic air-flow to pass through a stable segment and a contraction segment of the calibration wind tunnel to realize separating and smoothing operation for air-flow control, and generating a fifth characteristic air-flow. The adjusting method of air-flow temperature in a calibration wind tunnel can realize air-flow temperature adjusting in the calibration wind tunnel to enable the air-flow temperature to cover the air-flow temperature in the practical measuring environment and to enable velocity measurement of a wind-velocity indicator to be more accurate, and is high in flexibility and usability.
Description
Technical field
The present invention relates to calibration hot air wind tunnel technical field, particularly to a kind of gas flow temperature be applied to calibration wind tunnel
Control method and device.
Background technology
It is known that testing the speed field in flow field, it is a kind of to apply very extensive speed-measuring method that hot-wire anemometer tests the speed.Hot line
The principle of method be by one energising electrical heating wire, that is, hot line be placed in air-flow, hot line in the gas flow due to heat dissipation capacity change lead
The change of the resistance causing is relevant with flow velocity, and resistance variations can reflect the change of electric signal, finally gives flow velocity and electric signal
Corresponding relation.Hot line needs to be calibrated using calibration wind tunnel before use, simultaneously need to ensureing air-flow temperature in calibration wind tunnel
Degree is identical with the gas flow temperature of true measurement, if temperature is different, the error leading to Hot Wire Anemomtry is sharply increased, calibration wind tunnel
Temperature and actual measurement 1 DEG C of the air-flow temperature difference, big appointment causes the measure error of hot-wire anemometer 2%.In order to avoid due to
The temperature difference causes error, needs the temperature of air-flow in calibration wind tunnel can adjust it is possible to cover the gas temperature in true environment.
Current calibration wind tunnel is all the calibration wind tunnel in gas temperature for normal temperature, does not have a kind of calibration wind tunnel that can adjust temperature.
Content of the invention
In consideration of it, the problem being necessary to exist for conventional art, there is provided a kind of air-flow be applied to calibration wind tunnel
The control method of temperature and device, are capable of the gas flow temperature in calibration wind tunnel is adjusted so as to cover actual measurement
Gas flow temperature in environment is so that hot-wire anemometer tests the speed more accurately, and has higher flexibility and ease for use.
For reaching goal of the invention, provide a kind of control method of the gas flow temperature be applied to calibration wind tunnel, methods described
Including：Adjust and control the flow velocity of air-flow in the air inlet section of calibration wind tunnel, generate fisrt feature air-flow；By described fisrt feature gas
Stream operates to air-flow execution voltage stabilizing through the pressure-stabilizing section of described calibration wind tunnel, generates second feature air-flow；To described the generating
Two feature air-flows execute heating operation through the bringing-up section of described calibration wind tunnel to air-flow, and control gas by adjusting heating power
The temperature of stream, generates third feature air-flow；By the rectification section of described calibration wind tunnel, the described third feature air-flow generating is held
Row rectifying operation, generates fourth feature air-flow；Described fourth feature air-flow is taken be passed through the stable section of described calibration wind tunnel with
The operation of contraction section, realizes controlling separation and the quiet run of air-flow, generates fifth feature air-flow.
Wherein in an embodiment, the described air inlet section of described calibration wind tunnel includes：Thermal flowmeter and ecp
Valve；Wherein, described thermal flowmeter and described electropneumatic valve synergy, execution controls the air-flow entering described calibration wind tunnel
Mass flow and temperature.
Wherein in an embodiment, described by described fisrt feature air-flow through described calibration wind tunnel pressure-stabilizing section to gas
Stream execution voltage stabilizing operation, generates second feature air-flow and includes：By described fisrt feature air-flow through described calibration wind tunnel voltage stabilizing
Section, executes voltage stabilizing operation by pressurizer tank to air-flow, generates second feature air-flow；
Wherein in an embodiment, the described described second feature air-flow to generation is through the heating of described calibration wind tunnel
Section executes heating operation to air-flow, and by adjusting the temperature of heating power control air-flow, generates third feature air-flow：To generation
Described second feature air-flow through described calibration wind tunnel bringing-up section, by electric heater to air-flow execute heating operation, and
Control the temperature of air-flow by adjusting heating power, generate described third feature air-flow.
Wherein in an embodiment, the described rectification section by described calibration wind tunnel is to the described third feature gas generating
Stream execution rectifying operation, generates fourth feature air-flow and includes：By the flow straightening grid in the rectification section of described calibration wind tunnel and resistance
Buddhist nun's net, to the described third feature air-flow execution rectifying operation generating, generates described fourth feature air-flow.
Wherein in an embodiment, also include：In described bringing-up section, described rectification section, described stable section and described
The outside setting heat-preservation cotton of the described calibration wind tunnel of contraction section.
Wherein in an embodiment, also include：Exit setting thermoelectricity in the described contraction section of described calibration wind tunnel
The temperature survey to described fifth feature air-flow for the even execution, obtains the temperature value of described fifth feature air-flow.
Wherein in an embodiment, also include；Temperature value, atmospheric pressure according to the described fifth feature air-flow obtaining
And the outlet size of described contraction section, calculate the flow velocity of the air-flow in exit of described contraction section.
Wherein in an embodiment, the described air inlet section in calibration wind tunnel adjusts and controls the flow velocity of air-flow, generates the
Include before the step of one feature air-flow：The filtration of fillter section is executed to the air-flow of the described air inlet section entering described calibration wind tunnel
Operation.
A kind of adjusting means of the gas flow temperature be applied to calibration wind tunnel based on same inventive concept, described device bag
Include：First generation module, adjusts and controls the flow velocity of air-flow for the air inlet section in calibration wind tunnel, generates fisrt feature air-flow；
Second generation module, for grasping described fisrt feature air-flow through the pressure-stabilizing section of described calibration wind tunnel to air-flow execution voltage stabilizing
Make, generate second feature air-flow；3rd generation module, for generate described second feature air-flow through described calibration wind tunnel
Bringing-up section to air-flow execute heating operation, and by adjust heating power control air-flow temperature, generate third feature air-flow；
4th generation module, for executing rectification behaviour by the rectification section of described calibration wind tunnel to the described third feature air-flow generating
Make, generate fourth feature air-flow；5th generation module, is passed through described calibration wind tunnel for taking described fourth feature air-flow
Stable section and the operation of contraction section, realize controlling separation and the quiet run of air-flow, generate fifth feature air-flow.
A kind of control method of gas flow temperature be applied to calibration wind tunnel and device that the present invention provides.In calibration wind tunnel
Air inlet section adjust and control the flow velocity of air-flow, generate fisrt feature air-flow；Will be steady through calibration wind tunnel for fisrt feature air-flow
Pressure section, to air-flow execution voltage stabilizing operation, generates second feature air-flow；To the second feature air-flow generating adding through calibration wind tunnel
Hot arc executes heating operation to air-flow, and by adjusting the temperature of heating power control air-flow, generates third feature air-flow；Pass through
The rectification section of calibration wind tunnel, to the third feature air-flow execution rectifying operation generating, generates fourth feature air-flow；By fourth feature
Air-flow takes the operation of the stable section being passed through calibration wind tunnel and contraction section, realizes controlling separation and the quiet run of air-flow, generates
Fifth feature air-flow.The method is capable of the gas flow temperature in calibration wind tunnel is adjusted so as to cover actual measurement ring
Gas flow temperature in border is so that hot-wire anemometer tests the speed more accurately, and has higher flexibility and ease for use.
Brief description
Fig. 1 is the step of the control method of gas flow temperature be applied to calibration wind tunnel for one of the one embodiment of the invention
Rapid flow chart；And
Fig. 2 is the knot of the adjusting means of gas flow temperature be applied to calibration wind tunnel for one of the one embodiment of the invention
Structure schematic diagram.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples pair
The control method of gas flow temperature be applied to calibration wind tunnel for the present invention and device are further elaborated.It should be appreciated that
Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in figure 1, being the control method of gas flow temperature be applied to calibration wind tunnel for one of the embodiment
Flow chart of steps.Specifically include following steps：
Step 101, adjusts and controls the flow velocity of air-flow in the air inlet section of calibration wind tunnel, generates fisrt feature air-flow.
In the present embodiment, the air inlet section of calibration wind tunnel includes：Thermal flowmeter and electropneumatic valve；Wherein, heat type flow quantity
Meter controls the mass flow of air-flow entering calibration wind tunnel and temperature with electropneumatic valve synergy, execution.
Further, the air inlet section in calibration wind tunnel adjusts and controls the flow velocity of air-flow, generates the step of fisrt feature air-flow
Include before rapid：The filter operation of fillter section is executed to the air-flow of the air inlet section entering calibration wind tunnel.
Step 102, fisrt feature air-flow is operated to air-flow execution voltage stabilizing through the pressure-stabilizing section of calibration wind tunnel, generates second
Feature air-flow,.
In the present embodiment, fisrt feature air-flow is operated to air-flow execution voltage stabilizing through the pressure-stabilizing section of calibration wind tunnel, generates
Second feature air-flow includes：By fisrt feature air-flow through the pressure-stabilizing section of calibration wind tunnel, voltage stabilizing is executed to air-flow by pressurizer tank
Operation, generates second feature air-flow.
Step 103, executes heating operation through the bringing-up section of calibration wind tunnel to air-flow to the second feature air-flow generating, and
Control the temperature of air-flow by adjusting heating power, generate third feature air-flow.
In the present embodiment, the second feature air-flow generating is grasped to air-flow execution heating through the bringing-up section of calibration wind tunnel
Make, and control the temperature of air-flow by adjusting heating power, generate third feature air-flow：The second feature air-flow generating is passed through
The bringing-up section of calibration wind tunnel, executes heating operation by electric heater to air-flow, and controls air-flow by adjusting heating power
Temperature, generates third feature air-flow.
Step 104, executes rectifying operation by the rectification section of calibration wind tunnel to the third feature air-flow generating, and generates the 4th
Feature air-flow.
In the present embodiment, rectifying operation is executed to the third feature air-flow generating by the rectification section of calibration wind tunnel, generate
Fourth feature air-flow includes：By the flow straightening grid in the rectification section of calibration wind tunnel with damping screen to the third feature air-flow generating
Execution rectifying operation, generates fourth feature air-flow.
Step 105, fourth feature air-flow is taken the operation of the stable section being passed through calibration wind tunnel and contraction section, realizes controlling
The separation of air-flow and quiet run, generate fifth feature air-flow.
In one embodiment it is adaptable to the control method of gas flow temperature in calibration wind tunnel also includes：In bringing-up section, whole
The outside setting heat-preservation cotton of the calibration wind tunnel of stream section, stable section and contraction section.
Further, in one embodiment it is adaptable to the control method of gas flow temperature in calibration wind tunnel also includes：?
The exit of the contraction section of calibration wind tunnel arranges the temperature survey to fifth feature air-flow for the thermocouple execution, obtains fifth feature gas
The temperature value of stream.
Further, in one embodiment it is adaptable to the control method of gas flow temperature in calibration wind tunnel also includes；
The outlet size of temperature value, atmospheric pressure and contraction section according to the fifth feature air-flow obtaining, calculates contraction section
The flow velocity of the air-flow in exit.
A kind of control method of gas flow temperature be applied to calibration wind tunnel that the present invention provides.Air inlet in calibration wind tunnel
Section adjusts and controls the flow velocity of air-flow, generates fisrt feature air-flow；By fisrt feature air-flow through calibration wind tunnel pressure-stabilizing section pair
Air-flow execution voltage stabilizing operation, generates second feature air-flow；To generate second feature air-flow through calibration wind tunnel bringing-up section pair
Air-flow executes heating operation, and by adjusting the temperature of heating power control air-flow, generates third feature air-flow；By calibrating wind
The rectification section in hole, to the third feature air-flow execution rectifying operation generating, generates fourth feature air-flow；Fourth feature air-flow is adopted
Take the operation of the stable section being passed through calibration wind tunnel and contraction section, realize controlling separation and the quiet run of air-flow, generate the 5th special
Levy air-flow.The method is capable of the gas flow temperature in calibration wind tunnel is adjusted so as to cover in actual measuring environment
Gas flow temperature is so that hot-wire anemometer tests the speed more accurately, and has higher flexibility and ease for use.
Based on same inventive concept, additionally provide a kind of adjusting means of the gas flow temperature be applied to calibration wind tunnel, by
Similar to a kind of aforementioned control method of the gas flow temperature be applied to calibration wind tunnel in the principle of this device solve problem, because
This, the enforcement of this device can be realized according to the concrete steps of preceding method, repeats no more in place of repetition.
As shown in Fig. 2 being the adjusting means of gas flow temperature be applied to calibration wind tunnel for one of the embodiment
Structural representation.The adjusting means 10 of this gas flow temperature be applied to calibration wind tunnel includes：First generation module 100, second
Generation module 200, the 3rd generation module 300, the 4th generation module 400 and the 5th generation module 500.
Wherein, the first generation module 100 is used for adjusting and control the flow velocity of air-flow in the air inlet section of calibration wind tunnel, generates the
One feature air-flow；Second generation module 200 is used for fisrt feature air-flow is steady to air-flow execution through the pressure-stabilizing section of calibration wind tunnel
Press operation, generates second feature air-flow；3rd generation module 300 is used for the second feature air-flow generating through calibration wind tunnel
Bringing-up section executes heating operation to air-flow, and by adjusting the temperature of heating power control air-flow, generates third feature air-flow；The
Four generation modules 400 are used for executing rectifying operation by the rectification section of calibration wind tunnel to the third feature air-flow generating, and generate the
Four feature air-flows；5th generation module 500 is used for taking fourth feature air-flow stable section and the contraction section being passed through calibration wind tunnel
Operation, realize controlling the separation of air-flow and quiet run, generate fifth feature air-flow.
A kind of adjusting means of gas flow temperature be applied to calibration wind tunnel that the present invention provides.By the first generation module
100 adjust and control the flow velocity of air-flow in the air inlet section of calibration wind tunnel, generate fisrt feature air-flow；Pass through the second generation module again
Fisrt feature air-flow is operated to air-flow execution voltage stabilizing by 200 through the pressure-stabilizing section of calibration wind tunnel, generates second feature air-flow；Then
By the 3rd generation module 300, the second feature air-flow generating is grasped to air-flow execution heating through the bringing-up section of calibration wind tunnel
Make, and control the temperature of air-flow by adjusting heating power, generate third feature air-flow；Then pass through the 4th generation module 400
Rectifying operation is executed to the third feature air-flow generating by the rectification section of calibration wind tunnel, generates fourth feature air-flow；Finally lead to
Cross the operation that fourth feature air-flow is taken the stable section being passed through calibration wind tunnel and contraction section by the 5th generation module 500, realize control
The separation of air-flow processed and quiet run, generate fifth feature air-flow.This device is capable of to the gas flow temperature in calibration wind tunnel
It is adjusted so as to the gas flow temperature covering in actual measuring environment is so that hot-wire anemometer tests the speed more accurately, and have relatively
High flexibility and ease for use.
One of ordinary skill in the art will appreciate that realizing all or part of flow process in above-described embodiment method, it is permissible
Instruct related hardware to complete by computer program, described program can be stored in a computer read/write memory medium
In, this program is upon execution, it may include as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of control method of the gas flow temperature be applied to calibration wind tunnel is it is characterised in that methods described includes：
Adjust and control the flow velocity of air-flow in the air inlet section of calibration wind tunnel, generate fisrt feature air-flow；
Described fisrt feature air-flow is operated to air-flow execution voltage stabilizing through the pressure-stabilizing section of described calibration wind tunnel, generates second feature
Air-flow；
To air-flow, heating operation is executed through the bringing-up section of described calibration wind tunnel to the described second feature air-flow generating, and passes through
Adjust the temperature that heating power controls air-flow, generate third feature air-flow；
Rectifying operation is executed to the described third feature air-flow generating by the rectification section of described calibration wind tunnel, generates fourth feature
Air-flow；
Described fourth feature air-flow is taken the operation of the stable section being passed through described calibration wind tunnel and contraction section, realize controlling air-flow
Separation and quiet run, generate fifth feature air-flow.
2. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that described
The described air inlet section of calibration wind tunnel includes：Thermal flowmeter and electropneumatic valve；
Wherein, described thermal flowmeter and described electropneumatic valve synergy, execution controls the gas entering described calibration wind tunnel
The mass flow of stream and temperature.
3. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that described
Described fisrt feature air-flow is operated to air-flow execution voltage stabilizing through the pressure-stabilizing section of described calibration wind tunnel, generates second feature air-flow
Including：By described fisrt feature air-flow through the pressure-stabilizing section of described calibration wind tunnel, voltage stabilizing operation is executed to air-flow by pressurizer tank,
Generate second feature air-flow.
4. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that described
To air-flow, heating operation is executed through the bringing-up section of described calibration wind tunnel to the described second feature air-flow generating, and by adjusting
Heating power controls the temperature of air-flow, generates third feature air-flow：To the described second feature air-flow generating through described calibration
The bringing-up section of wind-tunnel, executes heating operation by electric heater to air-flow, and by adjusting the temperature of heating power control air-flow,
Generate described third feature air-flow.
5. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that described
Rectifying operation is executed to the described third feature air-flow generating by the rectification section of described calibration wind tunnel, generates fourth feature air-flow
Including：By the flow straightening grid in the rectification section of described calibration wind tunnel with damping screen to the described third feature air-flow execution generating
Rectifying operation, generates described fourth feature air-flow.
6. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that also wrap
Include：Protect in the outside setting of the described calibration wind tunnel of described bringing-up section, described rectification section, described stable section and described contraction section
Wen Mian.
7. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that also wrap
Include：Arrange thermocouple execution in the exit of the described contraction section of described calibration wind tunnel the temperature of described fifth feature air-flow is surveyed
Amount, obtains the temperature value of described fifth feature air-flow.
8. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 7 is it is characterised in that also wrap
Include；The outlet size of temperature value, atmospheric pressure and described contraction section according to the described fifth feature air-flow obtaining, meter
Calculate the flow velocity of the air-flow in the exit of described contraction section.
9. the control method of the gas flow temperature be applied to calibration wind tunnel according to claim 1 is it is characterised in that described
Adjust and control the flow velocity of air-flow in the air inlet section of calibration wind tunnel, include before generating the step of fisrt feature air-flow：To entrance
The air-flow of the described air inlet section of described calibration wind tunnel executes the filter operation of fillter section.
10. a kind of adjusting means of the gas flow temperature be applied to calibration wind tunnel is it is characterised in that described device includes：
First generation module, adjusts and controls the flow velocity of air-flow for the air inlet section in calibration wind tunnel, generates fisrt feature air-flow；
Second generation module, for executing voltage stabilizing through the pressure-stabilizing section of described calibration wind tunnel to air-flow by described fisrt feature air-flow
Operation, generates second feature air-flow；
3rd generation module, for holding to air-flow through the bringing-up section of described calibration wind tunnel to the described second feature air-flow generating
Row heating operation, and control the temperature of air-flow by adjusting heating power, generate third feature air-flow；
4th generation module, for executing rectification by the rectification section of described calibration wind tunnel to the described third feature air-flow generating
Operation, generates fourth feature air-flow；
5th generation module, for taking the stable section being passed through described calibration wind tunnel and contraction section by described fourth feature air-flow
Operation, realizes controlling separation and the quiet run of air-flow, generates fifth feature air-flow.
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| CN109141858A (en) * | 2018-09-11 | 2019-01-04 | 北京航空航天大学 | Test method and device suitable for vertical axis rotational flow field |
| CN110307911A (en) * | 2019-06-12 | 2019-10-08 | 河海大学 | A kind of method of air themperature in calculating access tunnel |
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| Publication number | Publication date |
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| CN106441793B (en) | 2018-02-13 |
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