CN110455491A - Interior flow resistance force measuring method and device based on bellows balance system - Google Patents
Interior flow resistance force measuring method and device based on bellows balance system Download PDFInfo
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- CN110455491A CN110455491A CN201910857433.1A CN201910857433A CN110455491A CN 110455491 A CN110455491 A CN 110455491A CN 201910857433 A CN201910857433 A CN 201910857433A CN 110455491 A CN110455491 A CN 110455491A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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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
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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
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
Interior flow resistance force measuring method and device based on bellows balance system belong to and flow drag measurement experimental technique field in aircraft, solve the problems, such as that tradition says mouth arrangement and survey pressure rake in inner flow tube and obtain that exit momentum has interference and precision is insufficient.Technical essential: this method measures internal resistance and then demarcating the thrust of inner flow passage in ground stand indirectly, comprising: obtains part suction parameter to be measured and obtains the entrance momentum on inner flow tube road；The exit momentum on inner flow tube road is directly obtained based on bellows balance system；The interior flow resistance power of part to be measured is that the momentum of entrance and outlet is poor.In addition, measuring device mainly includes bellows balance system, fairing, measuring section and linkage section, the parameter to be measured mentioned in the method, especially bellows balance system can be accurately obtained in the case where not interfering inner flow tube road to flow is able to solve the interference effect problem that pressure duct measures balance when synchronizing progress high-pressure air feed and aerodynamics force measurement in internal resistance measurement test.
Description
Technical field
The present invention relates to flow resistance force measuring method and devices in a kind of aircraft, and in particular to one kind is based on bellows balance
The interior flow resistance force measuring method and device of system belong to and flow drag measurement experimental technique field in aircraft.
Background technique
For the civil aircraft or transporter aircraft using fanjet, design early stage will be to air inlet system and exhaust system shape
It optimizes, in order to improve design efficiency and reduce design cost, the optimization and type selecting of air inlet system and exhaust system shape in engineering
Do not consider dynamic effect.The inlet mouth of inlets aircraft dynamometry model is lived with a stifled cone blocking usually, is made into
It is airproof.Obviously, the model of the aerodynamic coefficient and ventilation that measure in this way be it is discrepant, although special air intake test
Can accurate simulation air intake duct and air inlet stream, be capable of measuring the pressure recovery and total pressure distortion situation of air intake duct, but air inlet
The aerodynamic interference of aircraft component can not be measured, and ventilating model test then with real simulation intake port shape and can stream shape
State can be correctly obtained air inlet to the interference volume of each component of aircraft.Therefore tested by special ventilating model, can obtain and
Air inlet fluidised form similar wind tunnel model test data when full-scale flight.
In ventilating model, inner flow passage produces a certain amount of resistance, but in the resistance of aircraft composition, inside inner flow passage
The resistance that wall surface generates is not counted in full machine aerodynamic drag, should just deduct this portion when carrying out the analysis of full machine lifting resistance characteristic
Divide resistance.It is domestic at present that ventilating model internal resistance amendment is still mainly taken in model tail about the measurement method of inner flow passage resistance
The external mode for surveying pressure rake of strut installation measures that nozzle exit is total, static pressure, and then is converted into inner flow passage resistance.But this method is deposited
In following defect: rake aody has an impact to model bottom flowing, and then influences forebody drag；Model bottom complex flow influences to harrow
The measurement of body makes the precision of internal resistance be affected.Therefore, it is necessary to study a kind of new methods, to reduce internal resistance measurement to model
The influence of flows, while improving the precision of interior stream drag measurement.
Summary of the invention
It has been given below about brief overview of the invention, in order to provide about the basic of certain aspects of the invention
Understand.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine pass of the invention
Key or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form,
Taking this as a prelude to a more detailed description discussed later.
In consideration of it, the present invention in order to solve tradition inner flow tube say mouth arrangement survey pressure rake obtain exit momentum exist interference
And the problem of precision deficiency, and then a kind of interior flow resistance force measuring method based on bellows balance system is devised, it can
Effective internally stream carries out precise measurement.
Interior flow resistance force measuring method based on bellows balance system, as acquisition inner flow tube road inlet and outlet momentum it
Difference, and the entrance momentum of pipeline is ideal constant entropy thrust of the part to be measured under targeted test state, exit momentum is as to be measured
Actual measurement thrust of the part under targeted test state, i.e., interior flow resistance power Δ xIt is interiorAre as follows:
ΔxIt is interior=mIt surveysV∞-[mIt surveysVe+(pe-p∞)Ae]=Fi-Fg……(1)
Wherein, mIt surveysFor inner flow passage measured discharge, V∞For inner flow passage entrance velocity, VeFor inner flow passage muzzle velocity, peFor interior stream
Road outlet pressure, p∞For export environment pressure, AeFor inner flow passage discharge area, FiFor inner flow passage ideal constant entropy thrust, FgFor interior stream
Survey thrust in road.
Firstly, the part to be measured is fed back by stagnation pressure, the total temperature probe on measuring section before entrance on ground stand
Targeted test state is adjusted, and the entrance stagnation pressure P under acquisition and recording current state0And total temperature Tt；
Then, using the method based on algebraic mean to entrance stagnation pressure P0And total temperature TtIt is handled, and utilizes ground stand
Upper original high precision flow obtains the measured discharge m under current test stateIt surveys, later according to typical ideal constant entropy thrust
Calculation formula obtains the entrance momentum of part to be measured:
Wherein, R is gas constant, and k is specific heat ratio, P∞For environmental pressure；
Balance output aerodynamic force F is obtained under the targeted test state using bellows balance system；
Balance output aerodynamic force F is subjected to the amendment under current pressure and flow, correction amount is in bellows balance system school
It has all obtained on time, has obtained the current actual measurement thrust F of part to be measuredg:
Fg=F+f (P0)+f(mIt surveys)……(3)
It can be obtained interior flow resistance power Δ x of the part to be measured under the targeted test state by formula (1), (2), (3)It is interior。
In addition, in consideration of it, when the present invention carries out high-pressure air feed and aerodynamics force measurement to solve to synchronize in internal resistance measurement test
The interference effect problem that pressure duct measures balance, and then devise a kind of interior flow resistance power survey based on bellows balance system
Device is measured, which provides Equipment Foundations for above-mentioned measurement method.
Interior flow resistance force measuring device based on bellows balance system, including bellows balance system, fairing, measurement
Section and linkage section；
The linkage section, one end connect bellows balance system measuring section, and one end connects part entrance to be measured, and linkage section is one
Determine to match the different types of part to be measured of different size in size range, guarantee air-flow fairing into the part to be measured；
The measuring section before being arranged in part entrance to be measured, waits straight tubes road for one section, arranges total pressure measurement rake and total temperature thereon
Measuring point is used for feedback control and precise measurement part suction parameter to be measured；
The fairing includes orifice plate and honeycomb, and fairing is located at before measuring section, whole for carrying out to incoming flow
Stream, guarantees the uniformity of Inlet-air Velocity Distribution and the reliability of measuring section test data；
The bellows balance system is a kind of embedded bellows system of balance, is located at before fairing, for working as
Under the conditions of the part to be measured reaches targeted test, the thrust of part to be measured described in precise measurement.
Further: the bellows balance system includes beam strain-gauge balance and bellows component；
The beam strain-gauge balance is mounted on inside bellows component, and beam strain-gauge balance includes being sequentially connected from front to back
Fixing end, strain beam and measurement end, the components of strain be simple component or multi -components, the fixing end and measurement end of beam strain-gauge balance
Using cone connection or flanged joint between bellows component.
Further: the bellows component includes fixing end air supply pipe, circumferential nozzle, elastic element, bellows housing
Cylinder, measurement end air supply pipe and fiaring cone；
The fixing end air supply pipe of the bellows component is circumferential weld circuit design, and front end connect with supply air line, inside and
The fixing end of beam strain-gauge balance connects, and axis is consistent with beam strain-gauge balance axis, air supply inlet axis；
The fixing end air supply pipe axial end design of the bellows component has circumferentially uniformly distributed circumferential jet pipe, circumferential nozzle
It is connected through a screw thread between fixing end air supply pipe, nozzle direction and fixing end air supply pipe axis vertical take-off, makees for offsetting momentum
With；
The elastic element of the bellows component uses wavy metal form of tubes, and one end is connected to fixing end air supply pipe,
The other end connects bellows outer sleeve, for seals high pressure gas and can guarantee fixing end and measurement end there are a certain range of more
Freedom degree mobility eliminates the interference between bellows outer sleeve and fixing end air supply pipe；The measurement of the bellows component
End air supply pipe one end is connect with bellows outer sleeve and elastic element, and the other end is connect with linkage section, outside fiaring cone and bellows
Sleeve connection, fiaring cone play rectified action to the high pressure draught sprayed by nozzle.
Further: the elastic element of the bellows component is designed as coaxial and bilateral symmetry, further decreases
Interference between bellows outer sleeve and fixing end air supply pipe.
Further: extension of the bellows outer sleeve of the bellows component as beam strain-gauge balance measuring section, on
Face design has circumferential uniform venthole, and ventilation pore size distribution is consistent with the circumferential nozzle on fixing end air supply pipe.
The bellows balance system ultimately forms successively through fixing end air supply pipe, circumferential nozzle, elastic element, ripple
Pipe outer sleeve, measurement end air supply pipe, fiaring cone is realized to be supplied from balance fixing end to balance measurement end, and passes through elastic element
The interference for eliminating supply air line rectifies air-flow by fiaring cone.
The fixing end of beam strain-gauge balance, fixing end air supply pipe, elastic element fixing end be stationarily connected to together,
Constitute bellows balance system fixing end component.
The measurement end of beam strain-gauge balance, bellows outer sleeve, elastic element measurement end, fiaring cone are stationarily connected to one
It rises, constitutes bellows balance system measurement end component.
Present invention effect achieved are as follows:
1) before measuring device is both placed in inner flow tube road entrance, and fairing is devised, it is small to flowing interference；
2) exit momentum in inner flow tube road is obtained relative to traditional discrete point of pressure, present invention uses bellowss
Balance system directly obtains exit momentum, is not influenced by complex internal flowing, measurement result reliability and precision are higher；
3) bellows balance system eliminates entrance flowing momentum using circumferential nozzle in design, embedded same using balance
Axis layout reduces influence of the bellows to balance system；
4) fiaring cone of bellows component plays rectified action to the high pressure draught sprayed by nozzle；
5) elastic element of bellows balance system reduces the interference that supply air line measures balance using double elastic elements,
High-pressure air feed and high-acruracy survey part aerodynamic force to be measured are realized while being carried out, ensure that the standard of inner flow tube road outlet momentum survey
True property；
6) elastic element uses metal bellows diaphragm, is enough in the case where meeting the requirement such as rigidity, pressure-bearing and service life
Soft, that is, it ensure that balance measurement end component has certain six degree of freedom scope of activities relative to balance fixing end component,
Simultaneously metal bellows diaphragm it is preferable in non-deformability under by pressure and load condition, thus bring additional interference amount compared with
It is small；
7) acquisition of pressure, temperature, balance power is that trystate sentences the flat of a period of time in steady section in measurement method
, the precision and reliability of acquisition data are improved.
Detailed description of the invention
Fig. 1 is flow resistance power precise measurement overall plan schematic diagram in present invention part to be measured；
Fig. 2 is bellows balance system schematic diagram.
Specific label in figure are as follows: 1. parts to be measured, 2. linkage sections, 3. measuring sections, 4. fairings, 5. bellows balance systems
System, 6. high pressure draught air inlets, 7. beam strain-gauge balances, 8. fixing end air supply pipes, 9. circumferential nozzles, 10. elastic elements, 11.
Bellows outer sleeve, 12. measurement end air supply pipes, 13. fiaring cones.
Specific embodiment
Exemplary embodiment of the invention is described hereinafter in connection with attached drawing.For clarity and conciseness,
All features of actual implementation mode are not described in the description.It should be understood, however, that developing any this actual implementation
Much decisions specific to embodiment must be made during example, to realize the objectives of developer, for example, symbol
Restrictive condition those of related to system and business is closed, and these restrictive conditions may have with the difference of embodiment
Changed.In addition, it will also be appreciated that although development is likely to be extremely complex and time-consuming, to having benefited from the present invention
For those skilled in the art of disclosure, this development is only routine task.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
The meaning of heretofore described " inside and outside " refers to relative to equipment itself, the side inside sensing equipment
To in, on the contrary is outer, rather than the specific restriction to the device of the invention mechanism.
When the meaning of heretofore described " left and right " refers to reader's face attached drawing, the left side of reader is a left side,
The right of reader is the right side, rather than the specific restriction to the device of the invention mechanism.
The meaning of heretofore described " connection " can be between component be directly connected to be also possible to pass through between component
Other components are indirectly connected with.
Here, and also it should be noted is that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings
Illustrate only with closely related apparatus structure and/or processing step according to the solution of the present invention, and be omitted and the present invention
The little other details of relationship.The preferred embodiment of the present invention is elaborated below according to attached drawing.
Embodiment 1: in conjunction with Fig. 1-Fig. 2, to the interior flow resistance force measuring device based on bellows balance system of the present embodiment,
It is specifically described are as follows:
Including bellows balance system 5, fairing 4, measuring section 3 and linkage section 2；
1 intake section of part to be measured of ventilating model is connect with linkage section 2, the fixing end air supply pipe 8 of bellows balance system 5
It exports and connects with ground stand supply air line, the measurement end air supply pipe 12 of bellows balance system 5 is connect with linkage section 2；Rectification
Section apparatus 4 and measuring section 3 are arranged on linkage section 2, and fairing 4 is arranged in front of measuring section 3, and the cloth of measuring section 3 rests against
The entrance of nearly part 1 to be measured.
More specifically: fairing 4 includes an orifice plate and a honeycomb.
More specifically: a total pressure measurement rake and a total temperature measurement point are arranged on measuring section 3.
More specifically: bellows balance system 5 is the core component of this measuring device, and beam strain-gauge balance 7, which is mounted on, is
System is internal, and 7 fixing end of beam strain-gauge balance is connect with fixing end air supply pipe 8, and measurement end is connect with bellows outer sleeve 11, elasticity
Element 10 is mounted on exterior, and 10 fixing end of elastic element is connect with fixing end air supply pipe 8, measurement end and bellows outer sleeve
11 connections.Beam strain-gauge balance 7, fixing end air supply pipe 8, elastic element 10,11 axis of bellows outer sleeve keep coaxial.Solid
Air supply pipe 8 tip designs in fixed end have circumferentially distributed circumferential nozzle 9, and circumferential 9 axis of nozzle is located at pair of left and right elastic element 10
Intersect in title face and with 8 axis of fixing end air supply pipe.Measurement end air supply pipe 12 is connect with bellows outer sleeve 11, i.e., answers with rod-type
Flat 7 measurement ends that restore a reactionary rule are connected with 10 measurement end of elastic element.Last fiaring cone 13 is connect with bellows outer sleeve 11, to from ring
The air-flow sprayed to nozzle 9 into measurement end air supply pipe 12 is rectified.More specifically: elastic element 10 is by entire bellows day
Flat system 5 is divided to for two parts, and a part is connected with 7 measurement end of beam strain-gauge balance (whole is defined as balance for them
Measurement end component), another part is connected with 7 fixing end of beam strain-gauge balance (is integrally defined as balance fixing end group for them
Part), Lai Shixian bellows minimizes the influence that balance measures.
More specifically: elastic element 10 uses metal bellows diaphragm, is meeting the requirement such as rigidity, pressure-bearing and service life
Under be it is soft enough, that is, ensure that balance measurement end component has certain six degree of freedom living relative to balance fixing end component
Dynamic range, while metal bellows diaphragm is preferable in non-deformability under by pressure and load condition, thus bring is additional dry
The amount of disturbing is smaller.
Embodiment 2: in conjunction with Fig. 1-Fig. 2, to the interior flow resistance force measuring method based on bellows balance system of the present embodiment,
It is specifically described are as follows:
When test, high pressure gas supply is provided by ground stand, Real-time Feedback tune is harrowed by the total pressure measurement that measuring section 3 is arranged
Targeted test state is saved, after flow field is stablized, the entrance for collecting part 1 to be measured by total pressure measurement rake and total temperature measurement point is total
Press P0And total temperature Tt.Meanwhile in synchronization, part 1 to be measured is collected in current test shape by the high precision flow of rack
Measured discharge m under stateIt surveys。
Under the conditions of sentencing steady, the reality that order control bellows balance system 5 acquires part 1 to be measured under current test state is sent
When aerodynamic force, and correct to obtain the real-time thrust F of part 1 to be measured by the calibration data of bellows balance system 5g。
To the entrance stagnation pressure P of part 1 to be measured obtained0, total temperature Tt, measured discharge mIt surveys, real-time thrust FgIt is handled, is led to
Following formula is crossed to be calculated:
The acquisition of above-mentioned pressure, temperature, balance power is that trystate sentences being averaged for a period of time in steady section, and raising is adopted
Collect the precision and reliability of data.
The above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although referring to above-mentioned each implementation
Invention is explained in detail for example, those skilled in the art should understand that: it still can be to aforementioned each reality
It applies technical solution documented by example to modify, or equivalent substitution of some or all of the technical features；And this
It modifies or replaces, the range for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. the interior flow resistance force measuring method based on bellows balance system, which is characterized in that in ground stand calibration inner flow passage
Thrust measures internal resistance, internal resistance Δ x indirectly in turnIt is interiorIt is substantially the difference of inner flow passage entrance momentum and exit momentum, i.e., are as follows:
ΔxIt is interior=mIt surveysV∞-[mIt surveysVe+(pe-p∞)Ae]=Fi-Fg……(1)
Wherein, mIt surveysFor inner flow passage measured discharge, V∞For inner flow passage entrance velocity, VeFor inner flow passage muzzle velocity, peGo out for inner flow passage
Mouth pressure, p∞For export environment pressure, AeFor inner flow passage discharge area, FiFor inner flow passage ideal constant entropy thrust, FgFor inner flow passage reality
Survey thrust.
2. the interior flow resistance force measuring method based on bellows balance system according to claim 1, which is characterized in that in described
Runner ideal constant entropy thrust is obtained by accurately obtaining the suction parameter of inner flow passage:
Wherein, R is gas constant, and k is specific heat ratio, TtTo survey entrance total temperature, P0To survey entrance stagnation pressure, P∞For environmental pressure.
3. the interior flow resistance force measuring method based on bellows balance system according to claim 2, which is characterized in that in described
Runner measured discharge is obtained by the high precision flow of ground stand, specifically, is provided high pressure gas supply by ground stand, is led to
The total pressure measurement rake Real-time Feedback for crossing measuring section arrangement is adjusted to targeted test state, after flow field is stablized, is harrowed by total pressure measurement
And total temperature measurement point collects the entrance stagnation pressure P of part to be measured0And total temperature Tt；In synchronization, pass through the high-precision flow of rack
Meter collects measured discharge m of the part to be measured under current test stateIt surveys。
4. the interior flow resistance force measuring method based on bellows balance system according to claim 3, which is characterized in that in described
Runner actual measurement thrust is directly accurately obtained by bellows balance system, and specifically, bellows balance system acquires current test
The real-time aerodynamic force of part to be measured under state, and correct to obtain the inner flow passage of part to be measured by the calibration data of bellows balance system
Survey thrust Fg。
5. the interior flow resistance force measuring device based on bellows balance system, which is used for as measurement described in claim 1-4
Method provides infrastructure device characterized by comprising bellows balance system, fairing, measuring section and linkage section；
The linkage section, one end connect bellows balance system measuring section, and one end connects part entrance to be measured, and linkage section is in a scale
The different types of part to be measured of different size is matched in very little range, guarantee air-flow fairing into the part to be measured；
The measuring section before being arranged in part entrance to be measured, waits straight tubes road for one section, arranges that total pressure measurement rake and total temperature are surveyed thereon
Point is used for feedback control and precise measurement part suction parameter to be measured；
The fairing includes orifice plate and honeycomb, and fairing is located at before measuring section, for rectifying to incoming flow, is protected
Demonstrate,prove the uniformity of Inlet-air Velocity Distribution and the reliability of measuring section test data；
The bellows balance system is a kind of embedded bellows system of balance, is located at before fairing, for when described
Under the conditions of part to be measured reaches targeted test, the thrust of part to be measured described in precise measurement.
6. the interior flow resistance force measuring device based on bellows balance system according to claim 5, which is characterized in that the wave
Line pipe balance system includes beam strain-gauge balance and bellows component；The beam strain-gauge balance is mounted in bellows component
Portion, beam strain-gauge balance include sequentially connected fixing end, strain beam and measurement end from front to back, the components of strain be simple component or
Multi -components, using cone connection or flanged joint between the fixing end and measurement end and bellows component of beam strain-gauge balance.
7. the interior flow resistance force measuring device based on bellows balance system according to claim 6, which is characterized in that the wave
Line tube assembly includes fixing end air supply pipe, circumferential nozzle, elastic element, bellows outer sleeve, measurement end air supply pipe and fiaring cone；
The front end of the fixing end air supply pipe of the bellows component is connect with supply air line, the fixation of inside and beam strain-gauge balance
End connection；
The fixing end air supply pipe axial end design of the bellows component has circumferentially uniformly distributed circumferential jet pipe, circumferential nozzle direction
With fixing end air supply pipe axis vertical take-off, for offsetting Impulse；
Elastic element one end of the bellows component is connected to fixing end air supply pipe, and the other end connects bellows outer sleeve；Institute
The measurement end air supply pipe one end for stating bellows component is connect with bellows outer sleeve and elastic element, and the other end and linkage section connect
It connects, fiaring cone is connect with bellows outer sleeve, and fiaring cone plays rectified action to the high pressure draught sprayed by nozzle.
8. the interior flow resistance force measuring device based on bellows balance system according to claim 7, which is characterized in that the wave
The fixing end air supply pipe of line tube assembly is circumferential weld circuit design, axis and beam strain-gauge balance axis, air supply inlet axis one
It causes；The elastic element of bellows component uses wavy metal form of tubes.
9. the interior flow resistance force measuring device based on bellows balance system according to claim 8, which is characterized in that the wave
The elastic element of line tube assembly is designed as coaxial and bilateral symmetry, further reduces bellows outer sleeve and fixing end supplies
Interference between tracheae.
10. the interior flow resistance force measuring device based on bellows balance system according to claim 9, which is characterized in that described
Extension of the bellows outer sleeve of bellows component as beam strain-gauge balance measuring section, above design have circumferential uniform ventilation
Hole, ventilation pore size distribution are consistent with the circumferential nozzle on fixing end air supply pipe.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113479343A (en) * | 2021-07-05 | 2021-10-08 | 中国航空工业集团公司沈阳空气动力研究所 | Integrated test method for air inlet channel and force measurement |
| CN115436009A (en) * | 2022-11-08 | 2022-12-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Nozzle thrust measurement test system with integrated rear body and nozzle |
| CN116399548A (en) * | 2023-06-08 | 2023-07-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Air inlet channel inner surface aerodynamic characteristic measurement test device and installation and test method thereof |
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| CN115436009A (en) * | 2022-11-08 | 2022-12-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Nozzle thrust measurement test system with integrated rear body and nozzle |
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| CN116399547A (en) * | 2023-06-08 | 2023-07-07 | 中国空气动力研究与发展中心高速空气动力研究所 | Aircraft ventilation force measurement wind tunnel test device, installation method and test method thereof |
| CN116399547B (en) * | 2023-06-08 | 2023-08-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Aircraft ventilation force measurement wind tunnel test device, installation method and test method thereof |
| CN116399548B (en) * | 2023-06-08 | 2023-08-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Air inlet channel inner surface aerodynamic characteristic measurement test device and installation and test method thereof |
| CN117073973A (en) * | 2023-10-17 | 2023-11-17 | 中国航空工业集团公司沈阳空气动力研究所 | Multifunctional double-culvert jet pipe wind tunnel test model |
| CN117073973B (en) * | 2023-10-17 | 2023-12-12 | 中国航空工业集团公司沈阳空气动力研究所 | Multifunctional double-culvert jet pipe wind tunnel test model |
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