CN108955981A - Suitable for rotation boundary layer wall surface shear stress measurement method and device - Google Patents
Suitable for rotation boundary layer wall surface shear stress measurement method and device Download PDFInfo
- Publication number
- CN108955981A CN108955981A CN201810923270.8A CN201810923270A CN108955981A CN 108955981 A CN108955981 A CN 108955981A CN 201810923270 A CN201810923270 A CN 201810923270A CN 108955981 A CN108955981 A CN 108955981A
- Authority
- CN
- China
- Prior art keywords
- wall surface
- boundary layer
- layer wall
- shear stress
- rotation
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses one kind to be suitable for rotation boundary layer wall surface shear stress measurement method, presets to probe；The speed at the rotation multiple and different pre-determined distances of boundary layer wall surface is measured by pre-set probe, the multiple measurement results that will acquire are transmitted；The velocity function that one section of linear distribution is selected in the nearest region of distance rotation boundary layer wall surface, to velocity function linear fit；Measurement is completed by translation, hypothesis estimation and nondimensionalization operation to the velocity gradient that linear fit operation obtains.This method do not need to carry out any processing to wall surface, does not influence near wall flowing, it can be achieved that cut off the measurement of stress to wall surface, simple and convenient；It can be realized simultaneously wall surface and cut off stress τwAnd the determination of wall surface distance y；The miniaturization test macro of use may be implemented the measurement of rotating condition lower wall surface shear stress, and have the high efficiency and ease for use of application.The invention also discloses be suitable for rotation boundary layer wall surface shear stress measuring device.
Description
Technical field
The present invention relates to test field of measuring technique, are suitable for rotation boundary layer wall surface shear stress more particularly to one kind
Measurement method and device.
Background technique
In the research of rotating machinery, it is a very important amount that wall surface, which cuts off stress,.Under conventional quiescent conditions, by
It is big in installation space, the measurement of accomplished in many ways shear stress can be used.But in rotating condition, due to space by
Limit, therefore the measurement of wall surface shear stress is all a problem all the time.
The method of general measure wall surface shear stress generally uses thin film sensor to survey the shear stress of its wall surface
Amount, but the influence that thin film sensor flows wall surface in order to prevent, generally open a slot in wall surface, thin film sensor are embedded to
In slot, and guarantee that the outer surface of thin film sensor and wall surface one are flat, and then eliminates the influence flowed near wall.But it is this
Method needs to carry out channel wall special slot treatment, complex；Especially when wall surface heats, due to also needing to arrange
Heating device, party's rule are more difficult to realize.
Summary of the invention
Based on this, it is necessary to traditional technology there are aiming at the problem that, provide and a kind of be suitable for rotation boundary layer wall surface shearing
Method for measuring stress and device.Specifically, in the disclosure, in order to which the wall surface solved in rotating machinery cuts off asking for stress measurement
Topic, the present disclosure proposes rotation boundary layer wall surface shear stress measurement method is suitable for, specifically, based on linear bottom hypothesis
Rotate boundary layer wall surface shear stress measurement method.This method using boundary layer hot wire probe, displacement mechanism, Small-sized C TA module,
Small-sized D/A converter module, slip ring electrical feedthrough and computer measure rotating condition boundary layer speed, eventually by
Linear bottom is it is assumed that calculate wall surface shear stress.By the proposition of this method, that is, do not need to wall surface carry out it is any processing,
Near wall flowing is not influenced, and the measurement that stress is cut off to wall surface can be realized, it is simple and convenient；Wall surface may be implemented simultaneously to cut off
Stress τwAnd the determination of wall surface distance y；Further, the miniaturization test macro of use, may be implemented rotating condition lower wall
The measurement of face shear stress.
In a first aspect, the embodiment of the invention provides one kind to be suitable for rotation boundary layer wall surface shear stress measurement method,
The described method includes: being preset to probe；It is multiple not to rotation boundary layer wall surface by the pre-set probe
It is measured with the speed at pre-determined distance, and the multiple measurement results that will acquire are transmitted；Boundary layer wall is rotated in distance
The velocity function that one section of linear distribution is selected in the nearest region in face carries out linear fit operation to the velocity function；To line
Property fit operation obtain velocity gradient pass sequentially through translation, assume estimation and nondimensionalization operation complete measurement.
It is described in one of the embodiments, that preset to probe include: that boundary layer hot wire probe is passed through branch
Bar is fixedly installed on above displacement mechanism, and by the boundary layer hot wire probe be fixedly installed on rotation boundary layer wall surface it is default away from
From place.
It is described multiple and different to rotation boundary layer wall surface by the pre-set probe in one of the embodiments,
It includes: to adjust the distance to rotate boundary layer wall surface by pre-set boundary layer hot wire probe that speed at pre-determined distance, which measures,
The speed of a bit nearest measures, and is adjusted the distance by pre-set boundary layer hot wire probe and rotate boundary layer wall surface
The speed of a bit farthest measures.
In one of the embodiments, further include: adjusted the distance rotation by the pre-set boundary layer hot wire probe
The nearest speed a little with farthest a little intermediate multiple points described in the wall surface of boundary layer measures.
It includes: to pass sequentially through CTA mould that the multiple measurement results that will acquire, which carry out transmission, in one of the embodiments,
The multiple measurement result that block, digital-to-analogue conversion module and slip ring electrical feedthrough will acquire is transmitted on computer.
In one of the embodiments, further include: examine for carrying out the selected speed of the linear fit operation
Whether the coordinate points on degree function are all overlapped with the coordinate points of all places within a preset range；If for carrying out the Linear Quasi
Coordinate points on the velocity function selected by closing operation are all overlapped with the coordinate points of all places within a preset range, then right
The velocity gradient that linear fit operation obtains passes sequentially through translation, assumes that the rotation boundary layer wall surface shearing of estimation acquisition is answered
Power is true rotation boundary layer wall surface shear stress.
In one of the embodiments, further include: if for carrying out the selected speed of the linear fit operation
Coordinate points on function are not overlapped all with the coordinate points of all places within a preset range, select the coordinate in the preset range
The velocity function of point passes sequentially through translation, assumes estimation and nondimensionalization circulate operation until obtaining the true institute
State rotation boundary layer wall surface shear stress and corresponding ordinate.
Second aspect, the embodiment of the invention provides a kind of computer readable storage medium, the computer-readable storage
It is stored with computer program on medium, what the computer program realized above-mentioned first aspect when being executed by processor is suitable for rotation
Turn boundary layer wall surface shear stress measurement method.
The third aspect, the embodiment of the invention provides a kind of computer program products comprising instruction, when the computer journey
When sequence product is run on computers, so that computer executes method described in above-mentioned first aspect.
Fourth aspect, the embodiment of the invention also provides one kind to be suitable for rotation boundary layer wall surface shear stress measurement dress
It sets, described device includes: setup module, for presetting to probe；Measurement and transmission module, for by setting in advance
Multiple surveys that the probe set is measured to the speed at the rotation multiple and different pre-determined distances of boundary layer wall surface, and be will acquire
Amount result is transmitted；Process of fitting treatment module, in the nearest region of distance rotation boundary layer wall surface one section of selection it is linear
The velocity function of distribution carries out linear fit operation to the velocity function；Measurement module is obtained for operating to linear fit
Velocity gradient pass sequentially through translation, assume estimation and nondimensionalization operation complete measurement.
It is provided by the invention a kind of suitable for rotation boundary layer wall surface shear stress measurement method and device, probe is carried out
It presets；The speed at the rotation multiple and different pre-determined distances of boundary layer wall surface is measured by pre-set probe,
And the multiple measurement results that will acquire are transmitted；One section of selection linear point in the nearest region of distance rotation boundary layer wall surface
The velocity function of cloth carries out linear fit operation to velocity function；The velocity gradient obtained to linear fit operation passes sequentially through
Translation assumes that measurement is completed in estimation and nondimensionalization operation.This method utilizes boundary layer hot wire probe, displacement mechanism, small-sized
CTA module, small-sized D/A converter module, slip ring electrical feedthrough and computer measure rotating condition boundary layer speed,
Eventually by linear bottom it is assumed that calculating wall surface shear stress.By the proposition of this method, that is, do not need to appoint wall surface
Where reason does not influence near wall flowing, and the measurement that stress is cut off to wall surface can be realized, simple and convenient；It may be implemented simultaneously
Wall surface cuts off stress τwAnd the determination of wall surface distance y；Further, the miniaturization test macro of use, may be implemented to rotate
The measurement of condition lower wall surface shear stress, and there is the high efficiency and ease for use of application.
Detailed description of the invention
Fig. 1 is the step that one of one embodiment of the invention is suitable for rotating boundary layer wall surface shear stress measurement method
Rapid flow diagram；
Fig. 2 is the knot that one of one embodiment of the invention is suitable for rotating boundary layer wall surface shear stress measuring device
Structure schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, the specific embodiment for being suitable for rotating boundary layer wall surface shear stress measurement method and device to the present invention carry out further
It is described in detail.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, being suitable for rotating boundary layer wall surface shear stress measurement method for one of one embodiment
Flow diagram.Specifically includes the following steps:
Step 102, probe is preset.It should be noted that preset to probe includes: by boundary
Layer hot wire probe is fixedly installed on above displacement mechanism by strut, and boundary layer hot wire probe is fixedly installed on rotation boundary
At layer wall surface pre-determined distance.
Step 104, by pre-set probe to rotation the multiple and different pre-determined distances of boundary layer wall surface at speed into
Row measurement, and the multiple measurement results that will acquire are transmitted.
In one embodiment, at by pre-set probe to the rotation multiple and different pre-determined distances of boundary layer wall surface
It includes: to adjust the distance to rotate a bit of boundary layer wall surface recently by pre-set boundary layer hot wire probe that speed, which measures,
Speed measures, and is adjusted the distance by pre-set boundary layer hot wire probe and rotate a bit of boundary layer wall surface farthest
Speed measures.
Further, this disclosure relates to one kind be suitable for rotation boundary layer wall surface shear stress measurement method further include:
It is adjusted the distance by pre-set boundary layer hot wire probe and rotates nearest a little and farthest a little intermediate of boundary layer wall surface
The speed of multiple points measures.
In addition it is also necessary to explanation, it includes: to pass sequentially through CTA that the multiple measurement results that will acquire, which carry out transmission,
(Constant Temperature Anemometer, thermostatic type hot-wire anemometer) module, digital-to-analogue conversion module and slip ring draws
Multiple measurement results that electric appliance will acquire are transmitted on computer.The height that computer obtains measurement result in real time is improved as a result,
Effect property and ease for use.
Step 106, the velocity function of one section of linear distribution is selected in the nearest region of distance rotation boundary layer wall surface, it is right
Velocity function carries out linear fit operation.
Step 108, the velocity gradient obtained to linear fit operation passes sequentially through translation, assumes estimation and nondimensionalization
Measurement is completed in operation.
In one embodiment, this disclosure relates to one kind be suitable for rotation boundary layer wall surface shear stress measurement method also
It include: to examine for carrying out whether the coordinate points on the selected velocity function of linear fit operation with all are in preset range
Interior coordinate points are all overlapped；If being in for carrying out the coordinate points on the selected velocity function of linear fit operation with all
Coordinate points in preset range are all overlapped, then the velocity gradient obtained to linear fit operation passes sequentially through translation, assumes to estimate
The rotation boundary layer wall surface shear stress that meter obtains is true rotation boundary layer wall surface shear stress.
In addition, it should be noted that, this disclosure relates to one kind be suitable for rotation boundary layer wall surface shear stress measurement side
Method further include: if the coordinate points for being used to carry out on the selected velocity function of linear fit operation and all places are within a preset range
Coordinate points be not overlapped all, select preset range in coordinate points velocity function pass sequentially through translation, assume estimation and
Nondimensionalization circulate operation is until obtain true rotation boundary layer wall surface shear stress and corresponding ordinate.
It is surveyed to be further understood that and be suitable for rotation boundary layer wall surface shear stress with one kind that the disclosure proposes
Amount method carries out following example.It should be noted that the range that the disclosure is protected is not limited to following example.
Specifically, this disclosure relates to rotating turbomachinery boundary layer velocity fields of measurement, more particularly to one kind are based on linearly
The rotation boundary layer wall surface shear stress measurement method that bottom is assumed.The rotation boundary layer wall surface shearing assumed based on linear bottom
Method for measuring stress, comprising the following steps:
Firstly, boundary layer probe is fixed on displacement mechanism by strut, and probe is disposed adjacent at wall surface position,
Assuming that being y apart from wall surface distance0；Secondly, the speed near wall of probe measurement, passes through Small-sized C TA (Constant
Temperature Anemometer, thermostatic type hot-wire anemometer) module, small-sized digital-to-analogue conversion module and slip ring electrical feedthrough biography
It is delivered on static computer, realizes the speed (v to first point of near wall0) measurement, it is assumed that the first point probe is close
The distance of wall surface is y0。
Further, under the control of displacement mechanism, by hot wire probe to the distance of the mobile △ y in the position far from wall surface
(y1), measuring speed v again1；Further, above-mentioned process is repeated, until measuring the speed of the distance of enough principle wall surfaces
Spend yn,vn。
It should be noted that passing through speed (v achieved above0,v1···vn) and distance (y0,y1···yn),
One section of speed (v close to linear distribution is selected in the region of near wallm~vt), linear fit is carried out to it obtains speed ladder
Degree；It translates y coordinate system (δ y), fitting a straight line is enabled to pass through origin (y '0,y’1···y’n, wherein y '0=δ y+y0)。
It is understood that assuming that this velocity gradient is exactly linear bottom velocity gradient, and according to this speed ladder
Degree according to a preliminary estimate wall surface shear stress (vm<v<vt,y’m<y’<y’t).It should be noted that τwIt is wall surface shearing
Stress, what wherein prime symbol represented is first time iteration as a result, and wherein μ is the viscosity of fluid.According to
Wall surface shear stress according to a preliminary estimate is to the y-coordinate (y ' after translation0,y’1···y’n) and speed v (v0,v1···vn)
Nondimensionalization is carried out, that is, is obtained nondimensionalIt should be noted that obtaining nondimensional the
In one result, what wherein y+ was represented is nondimensional measuring point apart from wall surface distance, and ρ represents density, and the v of denominator represents stream herein
Body dynamic viscosity；In obtaining nondimensional second result, U+ represents nondimensional speed, wherein the molecule v generation in formula
Table speed.
Finally, the coordinate points (v in speed selected by fitting a straight line is checkedm<v<vt,y’m<y’<y’t) whether with
It is all to be in 3.5 < y+Coordinate points in the range of < 5 are all overlapped.If it is, the wall surface shear stress obtained before is just
It is true wall surface shear stress, the y-coordinate after translation is exactly true y-coordinate.If it is not, then selection is all to be in 3.5
< y+The speed repeated translation of coordinate points in the range of < 5 assumes that estimation and calculating obtain nondimensional step, until
Until true wall surface shear stress and y-coordinate.
It is provided by the invention a kind of suitable for rotation boundary layer wall surface shear stress measurement method, probe is set in advance
It sets；The speed at the rotation multiple and different pre-determined distances of boundary layer wall surface is measured by pre-set probe, and will be obtained
The multiple measurement results taken are transmitted；The speed of one section of linear distribution is selected in the nearest region of distance rotation boundary layer wall surface
Function is spent, linear fit operation is carried out to velocity function；The velocity gradient obtained to linear fit operation passes sequentially through translation, vacation
If measurement is completed in estimation and nondimensionalization operation.This method using boundary layer hot wire probe, displacement mechanism, Small-sized C TA module,
Small-sized D/A converter module, slip ring electrical feedthrough and computer measure rotating condition boundary layer speed, eventually by
Linear bottom is it is assumed that calculate wall surface shear stress.This method does not need to carry out wall surface that any processing, not influence wall surface attached
Nearly flowing, can be realized the measurement that stress is cut off to wall surface, simple and convenient；Wall surface, which may be implemented, cuts off stress τ simultaneouslywAnd wall
Determination of the identity distance from y；Further, rotating condition lower wall surface shear stress may be implemented in the miniaturization test macro of use
Measurement, and there is the high efficiency and ease for use of application.
Based on the same inventive concept, it additionally provides a kind of suitable for rotation boundary layer wall surface shear stress measuring device.By
It is similar to a kind of aforementioned rotation boundary layer wall surface shear stress measurement method that is suitable in the principle that this device solves the problems, such as, because
This, the implementation of the device can realize that overlaps will not be repeated according to the specific steps of preceding method.
As shown in Fig. 2, being suitable for rotating boundary layer wall surface shear stress measuring device for one of one embodiment
Structural schematic diagram.It should be suitable for rotation boundary layer wall surface shear stress measuring device 10 to include: setup module 100, measurement and pass
Defeated module 200, process of fitting treatment module 300 and measurement module 400.
Wherein, setup module 100 is for presetting probe；Measurement is used for transmission module 200 by preparatory
Multiple measurements that the probe of setting is measured to the speed at the rotation multiple and different pre-determined distances of boundary layer wall surface, and be will acquire
As a result it is transmitted；Process of fitting treatment module 300 be used in the nearest region of distance rotation boundary layer wall surface one section of selection it is linear
The velocity function of distribution carries out linear fit operation to velocity function；What measurement module 400 was used to obtain linear fit operation
Velocity gradient passes sequentially through translation, assumes estimation and nondimensionalization operation completion measurement.
It is provided by the invention a kind of suitable for rotation boundary layer wall surface shear stress measuring device, pass through setup module first
Probe is preset；It is multiple to rotation boundary layer wall surface by pre-set probe with transmission module by measurement again
Speed at different pre-determined distances measures, and the multiple measurement results that will acquire are transmitted；Again by process of fitting treatment
Module selects the velocity function of one section of linear distribution in the nearest region of distance rotation boundary layer wall surface, carries out to velocity function
Linear fit operation；Translation is passed sequentially through eventually by the velocity gradient that measurement module obtains linear fit operation, assumes to estimate
Measurement is completed in meter and nondimensionalization operation.The device utilizes boundary layer hot wire probe, displacement mechanism, Small-sized C TA module, small-sized
D/A converter module, slip ring electrical feedthrough and computer measure rotating condition boundary layer speed, eventually by linear
Bottom is it is assumed that calculate wall surface shear stress.This method does not need to carry out any processing to wall surface, does not influence near wall stream
It is dynamic, the measurement that stress is cut off to wall surface can be realized, it is simple and convenient；Wall surface, which may be implemented, cuts off stress τ simultaneouslywAnd wall surface away from
Determination from y；Further, the miniaturization test macro of use, may be implemented the measurement of rotating condition lower wall surface shear stress,
And there is the high efficiency and ease for use of application.
The embodiment of the invention also provides a kind of computer readable storage mediums.It is stored on the computer readable storage medium
There is computer program, which is executed by processor in Fig. 1.
The embodiment of the invention also provides a kind of computer program products comprising instruction.When the computer program product exists
When being run on computer, so that the method that computer executes above-mentioned Fig. 1.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the 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 be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot 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, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. one kind is suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that the described method includes:
Probe is preset；
The speed at the rotation multiple and different pre-determined distances of boundary layer wall surface is measured by the pre-set probe, and
The multiple measurement results that will acquire are transmitted；
The velocity function that one section of linear distribution is selected in the nearest region of distance rotation boundary layer wall surface, to the velocity function
Carry out linear fit operation；
Translation, hypothesis estimation and nondimensionalization operation is passed sequentially through to the velocity gradient that linear fit operation obtains to complete to survey
Amount.
2. according to claim 1 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that described
Preset to probe includes: to be fixedly installed on boundary layer hot wire probe above displacement mechanism by strut, and by institute
Boundary layer hot wire probe is stated to be fixedly installed at rotation boundary layer wall surface pre-determined distance.
3. according to claim 1 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that described
It includes: logical for being measured by the pre-set probe to the speed at the rotation multiple and different pre-determined distances of boundary layer wall surface
It crosses pre-set boundary layer hot wire probe and adjusts the distance and rotate the nearest speed of any of boundary layer wall surface and measure, Yi Jitong
It crosses pre-set boundary layer hot wire probe and adjusts the distance and rotate the farthest speed of any of boundary layer wall surface and measure.
4. according to claim 3 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that also wrap
Include: adjusted the distance by the pre-set boundary layer hot wire probe rotate described in the wall surface of boundary layer it is nearest a little with it is described most
The speed of remote a little intermediate multiple points measures.
5. according to claim 1 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that described
The multiple measurement results that will acquire carry out transmission
The multiple measurement result that passing sequentially through CTA module, digital-to-analogue conversion module and slip ring electrical feedthrough will acquire is transmitted to
On computer.
6. according to claim 1 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that also wrap
Include: examine for carry out the coordinate points on the selected velocity function of linear fit operation whether with it is all be in it is pre-
If the coordinate points in range are all overlapped；
If being in default model with all for carrying out the coordinate points on the selected velocity function of the linear fit operation
Coordinate points in enclosing all are overlapped, then the velocity gradient obtained to linear fit operation passes sequentially through translation, assumes to estimate
The rotation boundary layer wall surface shear stress of acquisition is true rotation boundary layer wall surface shear stress.
7. according to claim 6 be suitable for rotation boundary layer wall surface shear stress measurement method, which is characterized in that also wrap
It includes: if being in preset range with all for carrying out the coordinate points on the selected velocity function of the linear fit operation
Interior coordinate points are not overlapped all, and the velocity function of the coordinate points in the preset range is selected to pass sequentially through translation, vacation
If estimation and nondimensionalization circulate operation until obtain the true rotation boundary layer wall surface shear stress and with
Its corresponding ordinate.
8. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The step of any one of claim 1-7 the method is realized when row.
9. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes side described in any one of described claim 1-7 when executing described program
The step of method.
10. one kind is suitable for rotation boundary layer wall surface shear stress measuring device, which is characterized in that described device includes:
Setup module, for being preset to probe；
Measurement and transmission module, for passing through the pre-set probe to the rotation multiple and different pre-determined distances of boundary layer wall surface
The speed at place measures, and the multiple measurement results that will acquire are transmitted；
Process of fitting treatment module, for selecting the speed letter of one section of linear distribution in the nearest region of distance rotation boundary layer wall surface
Number carries out linear fit operation to the velocity function；
Measurement module, the velocity gradient for obtaining to linear fit operation pass sequentially through translation, assume estimation and dimensionless
Change operation and completes measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923270.8A CN108955981B (en) | 2018-08-14 | 2018-08-14 | Method and device suitable for measuring wall shear stress of rotating boundary layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923270.8A CN108955981B (en) | 2018-08-14 | 2018-08-14 | Method and device suitable for measuring wall shear stress of rotating boundary layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108955981A true CN108955981A (en) | 2018-12-07 |
| CN108955981B CN108955981B (en) | 2020-11-24 |
Family
ID=64469139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810923270.8A Active CN108955981B (en) | 2018-08-14 | 2018-08-14 | Method and device suitable for measuring wall shear stress of rotating boundary layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108955981B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871601A (en) * | 2019-01-30 | 2019-06-11 | 天津大学 | The method that the equal rotating disk electrode (r.d.e) equivalent simulation pipeline water flow of shearing stress moves state |
| CN110261009A (en) * | 2019-07-09 | 2019-09-20 | 北京航空航天大学 | The wall heat flux density measuring method and device assumed based on linear bottom |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4879899A (en) * | 1988-04-27 | 1989-11-14 | Massachusetts Institute Of Technology | Shear stress gauge |
| CN105022919A (en) * | 2015-07-06 | 2015-11-04 | 北京航空航天大学 | Method for predicting size of low-speed impact dent of circular metal sheet |
| CN106441793A (en) * | 2016-11-14 | 2017-02-22 | 北京航空航天大学 | Adjusting method and apparatus of air-flow temperature in calibration wind tunnel |
| CN106643879A (en) * | 2016-11-14 | 2017-05-10 | 北京航空航天大学 | Temperature and speed synchronous measurement method and device |
| CN107561310A (en) * | 2017-08-31 | 2018-01-09 | 北京航空航天大学 | Rotate PIV method of testings and system |
| CN108279187A (en) * | 2018-03-27 | 2018-07-13 | 苏州科技大学 | The test device and test method of fluid viscosity |
-
2018
- 2018-08-14 CN CN201810923270.8A patent/CN108955981B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4879899A (en) * | 1988-04-27 | 1989-11-14 | Massachusetts Institute Of Technology | Shear stress gauge |
| CN105022919A (en) * | 2015-07-06 | 2015-11-04 | 北京航空航天大学 | Method for predicting size of low-speed impact dent of circular metal sheet |
| CN106441793A (en) * | 2016-11-14 | 2017-02-22 | 北京航空航天大学 | Adjusting method and apparatus of air-flow temperature in calibration wind tunnel |
| CN106643879A (en) * | 2016-11-14 | 2017-05-10 | 北京航空航天大学 | Temperature and speed synchronous measurement method and device |
| CN107561310A (en) * | 2017-08-31 | 2018-01-09 | 北京航空航天大学 | Rotate PIV method of testings and system |
| CN108279187A (en) * | 2018-03-27 | 2018-07-13 | 苏州科技大学 | The test device and test method of fluid viscosity |
Non-Patent Citations (2)
| Title |
|---|
| 北京长城计量测试技术研究所: "《航空计量技术》", 31 December 2013, 航空工业出版社 * |
| 魏宽等: "旋转状态下方形通道内部流场特性热线实验", 《航空动力学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871601A (en) * | 2019-01-30 | 2019-06-11 | 天津大学 | The method that the equal rotating disk electrode (r.d.e) equivalent simulation pipeline water flow of shearing stress moves state |
| CN109871601B (en) * | 2019-01-30 | 2023-05-23 | 天津大学 | Method for equivalently simulating pipeline water flow state by using rotary disk electrodes with equal shear stress |
| CN110261009A (en) * | 2019-07-09 | 2019-09-20 | 北京航空航天大学 | The wall heat flux density measuring method and device assumed based on linear bottom |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108955981B (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Newton et al. | Transient heat transfer measurements using thermochromic liquid crystal. Part 1: An improved technique | |
| Johnson | Velocity and temperature fluctuation measurements in a turbulent boundary layer downstream of a stepwise discontinuity in wall temperature | |
| Sternberg | A theory for the viscous sublayer of a turbulent flow | |
| Peng et al. | Experimental and numerical study of film cooling with internal coolant cross-flow effects | |
| CN108955981A (en) | Suitable for rotation boundary layer wall surface shear stress measurement method and device | |
| Kim et al. | Experimental and numerical analysis of heat transfer phenomena in a sensor tube of a mass flow controller | |
| CN106290974A (en) | A kind of method using double-thermocouple to measure fluid velocity | |
| Kuzzay et al. | Global vs local energy dissipation: The energy cycle of the turbulent von Kármán flow | |
| CN106816190B (en) | Nuclear power plant reactor main pipeline coolant temperature measuring system and method | |
| Chambers et al. | A novel transient liquid crystal technique to determine heat transfer coefficient distributions and adiabatic wall temperature in a three-temperature problem | |
| Ikhlaq et al. | Methodology for spatially resolved transient convection processes using infrared thermography | |
| CN111062127A (en) | Pipeline leakage point detection method and device, storage medium and terminal | |
| Atayılmaz | Transient and steady-state natural convection heat transfer from a heated horizontal concrete cylinder | |
| Poncet et al. | Turbulent impinging jet flow into an unshrouded rotor–stator system: Hydrodynamics and heat transfer | |
| Gasljevic et al. | Measurement of temperature profiles in turbulent pipe flow of polymer and surfactant drag-reducing solutions | |
| Hummel et al. | Error Estimates for Lagrangian Flow Field Representations. | |
| CN110261009B (en) | Wall surface heat flow density measuring method and device based on linear bottom layer hypothesis | |
| CN105604985A (en) | Temperature distribution measuring method of shielded nuclear main pump cooling system | |
| Yang et al. | Virtual boundary element method in conjunction with conjugate gradient algorithm for three-dimensional inverse heat conduction problems | |
| Ma et al. | Experimental investigation on the steady, external laminar mixed convection heat transfer characteristics around a large diameter horizontal rotating cylinder | |
| RU2548135C1 (en) | Thermal wind-gage determination of fluid or gas flow velocity and direction and device to this end | |
| Elnady et al. | Experimental investigation of louver cooling scheme on gas turbine stator | |
| CN106643879B (en) | Temperature and speed sync measuring method and device | |
| Steurer et al. | Application of the Transient Heat Transfer Measurement Technique Using Thermochromic Liquid Crystals in a Network Configuration With Intersecting Circular Passages | |
| Kwag et al. | Inverse geometry problem of estimating the phase front motion of ice in a thermal storage system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220126 Address after: 1701-3, block a, building 1, No. 10, Ronghua Middle Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing 100176 Patentee after: Beijing Feiqing Technology Co.,Ltd. Address before: 100191 No. 37, Haidian District, Beijing, Xueyuan Road Patentee before: BEIHANG University Patentee before: Beijing Ruiao Technology Co., Ltd |
|
| TR01 | Transfer of patent right |