CN203053472U - Tool for measuring pressure and velocity of eddy flow field - Google Patents
Tool for measuring pressure and velocity of eddy flow field Download PDFInfo
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- CN203053472U CN203053472U CN2012204804094U CN201220480409U CN203053472U CN 203053472 U CN203053472 U CN 203053472U CN 2012204804094 U CN2012204804094 U CN 2012204804094U CN 201220480409 U CN201220480409 U CN 201220480409U CN 203053472 U CN203053472 U CN 203053472U
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Abstract
Provided is a tool for measuring pressure and velocity of an eddy flow field, characterized by comprising a seven-hole pressure probe, a one-dimensional hot-wire anemometer probe, a support system with two rotational degree-of-freedom, a three degree-of-freedom translation mechanism, seven pressure transducers, a manometer tube, a normal temperature electric bridge, a lead, a data acquisition management system and a control computer, wherein the seven-hole pressure probe and the hot-wire anemometer probe are located in a support system with two rotational degree-of-freedom which is fixed to the three degree-of-freedom translation mechanism; the seven-hole pressure probe is in connection with the seven pressure transducers through the manometer tube and is then in connection with the data acquisition management system and the control computer; the one-dimensional hot-wire anemometer probe is in connection with the normal temperature electric bridge through the lead and is then in connection with the data acquisition management system and the control computer.
Description
Technical field
The present invention relates to the fields of measurement of fluid.Specifically be in eddy flow field, to utilize seven apertures in the human head pressure probe and one dimension hot line to pop one's head in to measure the pressure of eddy flow field and the device of three-dimensional flow.
Background technology
Eddy flow field is common phenomena in the engineering, is principal character with distribution large scale vortex in the flow field.For example, the tip vortex field of the flow field of buildings lee gauge, wing, flow field of turbine engine peritrochanteric etc., and all be field of turbulent flow usually.Pressure and the three-dimensional instantaneous velocity that fluid flows must be accurately measured in research at this class physical phenomenon.From the angle of measuring, in the measuring process of eddy flow field, the velocity reversal rate of change of the measurement point of two vicinities is bigger, is the measurement of big flowing angle.
Along with electronics, optical technology are showing improvement or progress day by day, Laser Doppler Velocimeter (LDA), particle imaging velocity measuring technique fluid measurement methods such as (PIV) have had widely to be used.Yet often need bigger manufacturing cost and use cost with above-mentioned fluid measurement instrument, and all be to be applied in the less measured zone, measurement result must could obtain by the post-processing technology to signal.Whether truly Doppler range rate measurement and trace particle imaging are tested the speed and are all needed trace particle, the followability problem that the relative fluid of trace particle flows, i.e. the trace particle flow state of reacting fluid.Because the density of trace particle and the difference of fluid density cause both moment of inertia differences.In eddy flow field, trace particle can not truly reflect the movement locus of local fluid.The reliability of this class measuring technique can not get ensureing in the measurement of eddy flow field.
Hot-wire anemometer (Hot-wire anemometer) is another kind of flow field velocity survey instrument commonly used, and its principle is when utilizing fluid to flow through hot line, makes hot line produce thermal loss, thereby causes changes in resistance.Particularly have the characteristics that response is fast, accuracy is high, thereby often be used to the instantaneous measurement in flow field, be fit to very much the turbulence characteristic analysis of stream field.The measurement of three-dimensional flow speed needs three-dimensional hot line, i.e. three probes that heated filament is made, disturbance for the hot line probe stream field that reduces to be thin rod shape, need reduce its space scale as far as possible, not only manufacturing cost height, difficulty are big, and in actual application, heated filament very easily fractures, and causes to measure failure.When three-dimensional hot-wire anemometer is measured big flowing angle, need demarcate the state of the hot line under all taking measurement of an angle.For example, for the flow field flowing angle at-50 ° to+50 °,, be spaced apart the time that 5 ° three-dimensional hot line demarcates and need 8 hours approximately.This can cause electronic device generation drift, makes the calibration result distortion.However, hot-wire anemometer is still the most effective fluid-velocity survey instrument, one dimension hot line particularly, owing to simple in structure, cost of manufacture is low is used widely.
A lot of occasions, particularly for the measurement of fluid average flow velocity, the porous pressure probe, owing to have low cost, the processing and manufacturing characteristic of simple still is widely used.The basic principle of measurement that porous pressure probe (comprise three, four, five, seven apertures in the human head) is used for three dimensional velocity vectors be to measure from different holes pressure differential can judge the fluid velocity size and Orientation.In the eddy flow field, with respect to placement direction fixed pressure probe, fluid flow direction is big flowing angle.At this moment, fluid can produce the separation flow phenomenon at probe, causes fluid can not fully be attached to detecting head surface, and pressure port then can not accurately obtain local force value, measures failure.Such situation often takes place in three holes and five holes probe.By contrast, the seven apertures in the human head pressure probe has higher using value, and is when measuring bigger flowing angle, more reliable.
In a word, for the measurement of the pressure of eddy flow field and speed need develop a kind of accurately, reliably, survey instrument cheaply.
Summary of the invention
The present invention utilizes the advantage separately of seven apertures in the human head pressure probe and one dimension hot-wire anemometer, design one cover is used for the survey instrument that the eddy flow field fluid flows, be seven apertures in the human head pressure probe and one dimension hot line to be combined the three-dimensional transient state of measuring the eddy flow field fluid flow, i.e. pressure, related device and the operating process of speed (comprising average velocity, instantaneous velocity) when big flowing angle.
The pressure of the measurement eddy flow field that the present invention proposes and the instrument of speed comprise a seven apertures in the human head pressure probe (1), an one dimension hot-wire anemometer probe (2), mounting system (3), a Three Degree Of Freedom parallel moving mechanism (4), seven pressure transducers (5), force pipe (6), normal temperature electric bridge (7), lead (8), data acquisition management system (9) and the control computing machine parts such as (10) that two rotational freedoms are arranged.Fig. 1 is the layout of measuring the instrument of the pressure of eddy flow field and speed, has shown the annexation of above-mentioned parts.Indicate among the figure:
Seven apertures in the human head pressure probe (1) and hot-wire anemometer probe (2) are positioned on the mounting system (3) of two rotational freedoms;
There is the mounting system (3) of two rotational freedoms to be fixed on the Three Degree Of Freedom parallel moving mechanism (4);
Seven apertures in the human head pressure probe (1) is connected to seven pressure transducers (5) by force pipe (6), is connected to data acquisition system (DAS) (9), control computing machine (10);
One dimension hot-wire anemometer probe (2) is connected to normal temperature electric bridge (7) by lead (8), is connected to data acquisition system (DAS) (9), control computing machine (10).
The profile of seven apertures in the human head pressure probe (1) is the elongated cylinder shape, is truncated cone shape in its measuring junction end.Fig. 2 (a) and Fig. 2 (b) are respectively outside drawing and the top view of the measuring junction of seven apertures in the human head pressure probe.Top view is the view of watching measuring junction along the columniform axis of seven apertures in the human head pressure probe.The seven apertures in the human head pressure probe has a center pit (11), along distributing the equably periphery hole (12) at 120 ° at other six intervals of its circumferencial direction.Center pit is also referred to as pitot aperture; Six periphery holes are also referred to as baroport, and center pit (pitot aperture) and periphery hole (baroport) all are pressure ports.
Utilize Fig. 2 (b) that seven distinctive partitioning strategieses in hole of seven apertures in the human head pressure probe can be described, as shown in Figure 3.Label on the center pit is 7, the label of periphery hole from 1 to 6.Seven holes are divided into six districts, and there are four holes in each district: hole 7-4-3-5; Hole 7-3-2-4; Hole 7-2-1-3; Hole 7-1-2-6; Hole 7-6-1-5; Hole 7-5-4-6.More than six districts use 1 to 6 to be expressed as area code.As long as in any district there be adhering to of fluid, measurement is effectively.Flow feature at eddy flow field, angle between the direction of the seven apertures in the human head pressure probe (1) of flow direction and fixed placement is bigger, even the separation flow phenomenon might take place in the end of (1) in fluid, fluid is not attached to its end surface fully, but must have fluid to be attached in arbitrary district in six districts, the force value of four pressure ports in this district can obtain three-dimensional velocity and the pressure of local fluid.Thereby seven apertures in the human head pressure probe (1) can be measured flowing of wide-angle.Seven apertures in the human head pressure probe (1) needed to demarcate before measuring use.
One dimension hot-wire anemometer probe (2) profile is the shape that is slender cylinder.Fig. 4 is the outside drawing of the measuring junction of one dimension hot-wire anemometer probe.A heated filament (13) is welded on heated filament support (14) top, and the heated filament support is electric conductor, and root connects lead (8).It is to be in the lead sleeve (15) of slender cylinder that lead (8) places profile.The lead other end connects normal temperature electric bridge (7).Fluid flows through heated filament (13), causes it to produce certain heat dissipation, causes its changes in resistance, and normal temperature electric bridge (7) output voltage values changes.Relation between the output of the speed of fluid and normal temperature electric bridge (7) needs to demarcate.
Fig. 5 is the definition of two rotational freedoms producing of mounting system (3) that two rotational freedoms are arranged, namely refers to produce under cartesian coordinate system the rotation of pendulum angle α ° (16) and pitch angle degree β ° (17).The angle of two rotational freedom rotations should cover the flowing angle in the flow field.X among the figure, y, z are the three-dimensionals of cartesian coordinate system.
Fig. 6 is the structural representation that the mounting system of two rotary freedoms is arranged.Represented the principle that pendulum angle α ° (16) and pitch angle degree β ° of (17) two degree of freedom produces among the figure.This system comprises probe location clip (18), worm gear (19), worm screw (20), stepper motor No. 1 (21), support (22), transmission shaft (23), thrust bearing (24), No. 2 parts such as (25) of stepper motor.The annexation of each parts as shown in FIG..
Fig. 6 has also represented to have the mounting system (3) of two rotational freedoms to be fixed on the Three Degree Of Freedom parallel moving mechanism (4).The Three Degree Of Freedom parallel moving mechanism refers to the motion on the three-dimensional planar direction under the cartesian coordinate system, respectively by three step motor control.Above-mentioned two rotational freedoms and three translational degree of freedom constitute five spatial degrees of freedom altogether.Fig. 7 has represented the formation of the relation between five spatial degrees of freedom.Represent among the figure: along the translation (26) of x-direction, the translation (27) of y-direction, the translation (28) of z-direction, the mounting system (3) that two rotational freedoms are arranged can be moved to any spatial point on x-y, y-z, the x-z plane, can be by the mounting system that two rotational freedoms are arranged (3) generation pendulum angle α ° (16) and the rotation of pitch angle degree β ° (17) as shown in Figure 5 in the locality.
The use flow process of the pressure of the measurement eddy flow field that the present invention proposes and the instrument of speed is: with the flow direction of seven apertures in the human head pressure probe acquisition measurement point, measure instantaneous velocity with one dimension hot line probe at same measurement point streamwise then.Fig. 8 is the process flow diagram of the use of this instrument.Represent among the figure that this instrument use specifically was divided into for four steps.Specifically:
The first step is the demarcation of seven apertures in the human head pressure probe;
Second step was the demarcation of one dimension hot-wire anemometer;
The 3rd step was the flowing angle that obtains measurement point with the seven apertures in the human head pressure probe;
The 4th step was to replace the seven apertures in the human head pressure probe with one dimension hot line probe, carried out instantaneous velocity along known flowing angle and measured.
Description of drawings
Fig. 1 is the layout of measuring the instrument of the pressure of eddy flow field and speed.Among the figure, 1 seven apertures in the human head pressure probe, 2 one dimension hot-wire anemometers probe, 3 have mounting system, 4 Three Degree Of Freedom parallel moving mechanisms, 5 seven pressure transducers, 6 force pipes, 7 normal temperature electric bridges, 8 leads, 9 data acquisition management systems, 10 of two rotational freedoms to control computing machines.
Fig. 2 (a) and Fig. 2 (b) are respectively outside drawing and the top view of the measuring junction of seven apertures in the human head pressure probe.Among the figure, 11 center pits, 12 periphery holes.
Fig. 3 is the partitioning strategies in seven holes of seven apertures in the human head pressure probe.
Fig. 4 is the outside drawing of the measuring junction of one dimension hot-wire anemometer probe.Among the figure, 13 heated filaments, 14 heated filament supports, 15 lead sleeves.
Fig. 5 is the definition of two rotational freedoms.Among the figure, 16 pendulum angle α °, β ° of 17 pitch angle degree, 1 seven apertures in the human head pressure probe, 2 one dimension hot-wire anemometers probe.
Fig. 6 is the structural representation that the mounting system of two rotary freedoms is arranged.Among the figure, 16 pendulum angle α °, No. 1,21 stepper motors, 24 thrust bearings, 22 supports, β ° of 17 pitch angle degree, 1 seven apertures in the human head pressure probe, 2 one dimension hot-wire anemometers probe, 19 worm gears, 18 location clips, 20 worm screws, 23 transmission shafts, No. 2,25 stepper motors, 4 Three Degree Of Freedom parallel moving mechanisms.
Fig. 7 is the formation of five relations between the spatial degrees of freedom.Among the figure, the translation of 1 seven apertures in the human head pressure probe, 2 one dimension hot-wire anemometers probe, β ° of 17 pitch angle degree, 16 pendulum angle α °, 27y-direction, the translation of the translation 26x-direction of 28z-direction, the mounting system that 4 Three Degree Of Freedom parallel moving mechanisms, 3 have two rotational freedoms.
Fig. 8 is the process flow diagram of use of measuring the instrument of the pressure of eddy flow field and speed.
Fig. 9 (a), Fig. 9 (b) are the measurement scheme figure in the flow field of three-dimensional wing wake flow.Among the figure, 30 tunnel airstream flow directions, 31 three-dimensional wings, 29 wind-tunnel, 1 seven apertures in the human head pressure probe, 2 one dimension hot-wire anemometers probe, 3 have aperture on the mounting system, 4 Three Degree Of Freedom parallel moving mechanisms, 6 force pipes, 8 leads, 32 wind-tunnel walls of two rotational freedoms, 5 seven pressure transducers, 7 normal temperature electric bridges, 33 signal amplifiers, 9 data acquisition management systems, 10 control computing machines, 34 control lines.
Embodiment
Below in conjunction with specific embodiment structure of the present invention and principle are described further.These examples of implementation are three-dimensional transient flow fields of measuring the three-dimensional wing wake flow with the instrument of the pressure of the measurement eddy flow field of the present invention's proposition and speed in subsonic wind tunnel.As everyone knows, the flow field of three-dimensional wing wake flow is to be principal character with the wing tip vortex structure.The wing tip vortex structure shows as mobile spiral-shaped and propagates down stream, is the flow field that highly rotates.Fig. 9 (a) and (b) are the measurement scheme figure in the flow field of three-dimensional wing wake flow, have represented seven apertures in the human head pressure probe (1) and one dimension hot line probe (2) respectively, with the annexation of miscellaneous part.Parts composition, layout and the annexation of the pressure of the measurement eddy flow field that this specific embodiment uses and the instrument of speed are same as shown in Figure 1, here no longer narration.
As shown in Fig. 9 (a) and (b), the measurement mechanism integral body that the present invention proposes is placed in the wind-tunnel (29), and the air current flow direction (30) that produces in the wind-tunnel is placed in the downstream of three-dimensional wing (31).The static pressure p of wind-tunnel
StaStagnation pressure p can be obtained from the baroport on the wall
TotDetermined by wind-tunnel entrance state.Wind-tunnel produces horizontal one dimension incoming flow, and flow velocity can be regulated from the subsonic speed to the supersonic speed, under the different wind speed, and the static pressure p of wind-tunnel
StaChange the stagnation pressure p of wind-tunnel
TotConstant.
It is identical with Fig. 2 (a), Fig. 2 (b) to be the shaft-like seven apertures in the human head pressure probe end profiles figure of slender cylinder.Circular cone is the taper of 30 degree, and the taper volume is the spheroid of 3.5mm less than diameter.The diameter 1.3mm of each pressure port.The elongate cylinder body diameter is 5mm.Material is that stainless steel is made.The partitioning strategies in seven holes of seven apertures in the human head pressure probe (1) as shown in Figure 3.
The afterbody of Fig. 9 (a) expression seven apertures in the human head pressure probe (1) is connected with force pipe (6), be seven flexible tubules herein, stretch out with seven pressure transducers (5) from the aperture (32) of wind-tunnel wall and to link to each other, connect signal amplifier (33) and data acquisition system (DAS) (9) again.
Fig. 9 (b) expression one dimension hot line probe profile is identical with Fig. 4.Heated filament (13) material is nickel-chrome (Nickel chromium), and diameter is 5 μ m.Heated filament support (14) stretches out elongated cylinder 3mm.Lead (8) stretches out from the aperture (32) of wind-tunnel wall and is connected to normal temperature electric bridge (7), signal amplifier (33) and data acquisition system (DAS) (9).
Data acquisition system (DAS) (9) connects control computing machine (10), and mounting system (3) and the Three Degree Of Freedom parallel moving mechanism (4) of two rotational freedoms are arranged by control line (34) adjustment.
The process flow diagram of the use of this instrument that provides according to Fig. 8, the first step is the demarcation of seven apertures in the human head pressure probe.In wind-tunnel, adjust the parallel moving mechanism and the mounting system that two rotational freedoms are arranged of three degree of freedom, location seven apertures in the human head pressure probe is at the wind-tunnel center, and make the seven apertures in the human head pressure probe cylindrical outer shape axis direction with come flow path direction consistent, namely pendulum angle α ° and pitch angle degree equal zero for β °.The flowing angle of demarcating is spaced apart 5 ° from-50 ° to 50 °, altogether the angle of about 400 needs demarcation.The angle of representing with different (α °, β °) for each, need demarcation, seven force value need obtaining from seven pressure transducers that connect the seven apertures in the human head pressure probe obtain 14 pressure coefficients through calculating.They are radial pressure coefficient Cpr
iWith tangential pressure coefficient Cpt
iBe expressed as respectively
The subscript i of variable represents the label in hole in the formula, also is the area code of the partitioning strategies represented among Fig. 3, i=1, and 2 ... 6.If i=1, then j1=6; If j2=2 is i=6, then j1=5; J2=1, when i equals other, j1=i+1 then; J2=i-1.
At the situation of low-angle flow direction (flow angle is less than 30 °), fluid is attached on the probe fully, and radial pressure coefficient and the tangential pressure coefficient of center pit (hole 7) can be tried to achieve with following formula,
Wherein
From this process as can be seen, the stagnation pressure P of not relevant with speed of incoming flow wind-tunnel in asking for the formula of pressure coefficient
TotWith static pressure P
StaValue.Thereby the demarcation of flowing angle and speed of incoming flow are irrelevant, need not consider other speed operating modes.If demarcate 20 seconds consuming time of angle at each, 400 angle calibrations of gamut need 2.2 hours altogether.After demarcating end, form the nominal data tabulation, wherein each is demarcated angle (α °, β °) and all forms one-to-one relationship with 14 pressure coefficients.
Second step of measuring is the demarcation of carrying out one dimension hot line probe in wind-tunnel.This process is to carry out speed to demarcate, and scaling method is known.Timing signal is the probe of thin rod shape along coming flow path direction to place.This process is quick, simple.Demarcate according to 20 speed operating modes, each operating mode needs 20 seconds, needs about 7 minutes altogether.Calibration process is namely measured the first step and second step, is no more than 3 hours altogether.
The 3rd step of measuring is the flow direction that obtains measurement point with the seven apertures in the human head pressure probe.The seven apertures in the human head pressure probe is remained on the position of timing signal, namely α °=0, β °=0.Adjust the parallel moving mechanism (4) of three degree of freedom, can make the measuring junction of seven apertures in the human head pressure probe reach spatially each measurement point.Obtain the force value of seven pressure ports at each measurement point.Calculate the pressure coefficient of measurement point according to formula (1)-(4), utilize the pressure coefficient that records and the pressure coefficient data list of demarcation to carry out the angle interpolation, obtain the flow direction of measurement point, be i.e. (α °, β °) of the measurement point that obtains with interpolation.Locus, flowing angle and the pressure coefficient of measurement point are recorded as file with data analysis and processing unit in the control computing machine among Fig. 1.
Measuring for the 4th step is with one dimension hot line probe measurement instantaneous velocity.Change seven apertures in the human head pressure probe (1), change a hot-wire anemometer probe (2), by control computing machine (10), at each measurement point, according to recorded about the locus of measurement point, the file of flowing angle, adjusting has the mounting system (3) of two degree of freedom and the parallel moving mechanism (4) of three degree of freedom, reorientate one dimension hot line probe (2), until its flow direction along this measurement point, i.e. known (α °, β °).Like this, the three-dimensional flow measurement in flow field is processed into local one dimension flow measurement.The local transient state flowing velocity V that obtains is easy to try to achieve the instantaneous velocity three-dimensional component
u＝Vcosα°cosβ°；v＝Vsinα°；w＝-Vcosα°sinβ°。(6)
By such measuring process, specifically be that each measurement point of stream field has carried out twice measurement, obtain the flow field flow direction with the seven apertures in the human head pressure probe for the first time, obtain the flow field instantaneous velocity with one dimension hot line probe for the second time.Above-mentioned measurement mechanism and flow process are fit to eddy flow field, i.e. the measurement in the flow field of big flowing angle has replaced the three-dimensional hot-wire anemometer that common needs use under this situation.According to the device that the present invention proposes, total Measuring Time does not rise appreciably, and will lack respectively much because the measurement time spent of seven apertures in the human head pressure probe and one dimension hot line is compared three-dimensional hot line.If these examples of implementation use three-dimensional hot-wire anemometer, nominal time and speed operating mode calibration range according to identical angle calibration scope, each angle, namely demarcate angle by 400, each is demarcated angle and needs 20 seconds, 20 speed operating modes are calculated, and only the nominal time just needs: 20 seconds x20x400=44 hour.And use of the present invention makes measuring process simple, quick, and as mentioning the front, the nominal time is no more than 3 hours, saved for 90% time, greatly shorten and simplified hot line nominal time and process, reduced the long-time overheated of surveying instrument and the error brought, make measurement result more reliable.The cost of manufacture of seven apertures in the human head pressure probe is about 10% of one dimension hot line probe, and the cost of manufacture of one dimension hot line probe is about 1% of three-dimensional hot line probe.Thereby the method for the common employed three-dimensional hot-wire anemometer of three-dimensional instantaneous measurement that replaces with a seven apertures in the human head pressure probe and one dimension hot-wire anemometer has reduced manufacturing cost more than 95%.
Claims (3)
1. measure the pressure of eddy flow field and the instrument of speed for one kind, it is characterized in that, comprise a seven apertures in the human head pressure probe (1), an one dimension hot-wire anemometer probe (2), mounting system (3), a Three Degree Of Freedom parallel moving mechanism (4), seven pressure transducers (5), force pipe (6), normal temperature electric bridge (7), lead (8), data acquisition management system (9) and the control computing machine (10) that two rotational freedoms are arranged, the annexation of above-mentioned parts:
Seven apertures in the human head pressure probe (1) and hot-wire anemometer probe (2) are positioned on the mounting system (3) of two rotational freedoms;
There is the mounting system (3) of two rotational freedoms to be fixed on the Three Degree Of Freedom parallel moving mechanism (4);
Seven apertures in the human head pressure probe (1) is connected to seven pressure transducers (5) by force pipe (6), is connected to data acquisition system (DAS) (9), control computing machine (10);
One dimension hot-wire anemometer probe (2) is connected to normal temperature electric bridge (7) by lead (8), is connected to data acquisition system (DAS) (9), control computing machine (10).
2. a kind of pressure of eddy flow field and instrument of speed measured according to claim 1 is characterized in that the profile of described seven apertures in the human head pressure probe (1) is the shape of elongated cylinder, is truncated cone shape in its measuring junction end.
3. a kind of pressure of eddy flow field and instrument of speed measured according to claim 1 is characterized in that, described one dimension hot-wire anemometer probe (2) profile is the shape that is slender cylinder.
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| CN106840271B (en) * | 2017-03-31 | 2020-07-03 | 北京航空航天大学 | Combined dynamic probe with temperature correction function for measuring total pressure and speed of fluid |
| CN106840270A (en) * | 2017-03-31 | 2017-06-13 | 北京航空航天大学 | A kind of hot wire probe with temperature adjustmemt |
| CN106840270B (en) * | 2017-03-31 | 2020-09-25 | 北京航空航天大学 | Hot wire probe with temperature correction function |
| CN106840271A (en) * | 2017-03-31 | 2017-06-13 | 北京航空航天大学 | A kind of measurement fluid stagnation pressure, the combination dynamic probe of speed with temperature adjustmemt |
| WO2018205507A1 (en) * | 2017-05-12 | 2018-11-15 | 中国科学院工程热物理研究所 | Dynamic five-hole probe |
| CN107101798A (en) * | 2017-05-12 | 2017-08-29 | 中国科学院工程热物理研究所 | A kind of dynamic five-hole probe |
| US11422057B2 (en) | 2017-05-12 | 2022-08-23 | Institute Of Engineering Thermophysics, Chinese Academy Of Sciences | Dynamic five-hole probe |
| CN111537187A (en) * | 2020-04-29 | 2020-08-14 | 中国汽车工程研究院股份有限公司 | Force and flow field multi-technology linkage measurement control method and system |
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| CN113390604A (en) * | 2021-07-16 | 2021-09-14 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | One-dimensional hot wire probe suitable for high-speed flow field measurement |
| CN113390604B (en) * | 2021-07-16 | 2023-03-03 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | One-dimensional hot wire probe suitable for high-speed flow field measurement |
| CN117825753A (en) * | 2024-03-04 | 2024-04-05 | 中国航空工业集团公司沈阳空气动力研究所 | Monofilament hot wire calibration device and method in extremely low speed range |
| CN117825753B (en) * | 2024-03-04 | 2024-05-28 | 中国航空工业集团公司沈阳空气动力研究所 | Monofilament hot wire calibration device and method in extremely low speed range |
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