CN207717327U - Small-range high lift-drag ratio force balance applied to low density wind tunnel - Google Patents
Small-range high lift-drag ratio force balance applied to low density wind tunnel Download PDFInfo
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- CN207717327U CN207717327U CN201820072786.1U CN201820072786U CN207717327U CN 207717327 U CN207717327 U CN 207717327U CN 201820072786 U CN201820072786 U CN 201820072786U CN 207717327 U CN207717327 U CN 207717327U
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Abstract
The utility model discloses a kind of small-range high lift-drag ratio force balances applied to low density wind tunnel, including：Balance main body is disposed with model connecting pin, the first measurement in a closed series element, axial force measuration element, rolling moment measuring cell, the second measurement in a closed series element and strut thereon；In order to reduce the interference of relatively large normal force and pitching moment load to axial force component and rolling moment component, axial force measuration element and rolling moment measuring cell are arranged among balance measurement element, both ends are symmetrical arranged measurement in a closed series element, for measuring remaining four component in addition to axial force and rolling moment.The design load and appearance and size of the small-range high lift-drag ratio force balance fully meet lift body complex appearance model low density wind tunnel dynamometer check requirement, it is effectively improved the test capability of low density wind tunnel, while the utility model improves axial force measuration precision and anti-interference ability；Improve rolling moment sensitivity and measurement accuracy.
Description
Technical field
The utility model belongs to aerospace dynamometer check technical field, and in particular to a kind of multiple applied to low density wind tunnel
The small-range high lift-drag ratio force balance of miscellaneous lifting body contour model aerodynamics force measurement.
Background technology
Low density wind tunnel is the important tests equipment for studying thin aerodynamic characteristic, is flown to Simulated Spacecraft high-altitude, high speed
Row state, carry out spacecraft model has in Slide mode, the research of transition flow region aerodynamic characteristics tests and superaerodynamics
The experimental study of pass problem.
With the fast development of hypersonic complex appearance aircraft, aircraft flies in rarefied transitional flow area, Slide mode
The capable time increases considerably, and strong viscosity interference has a great impact to its aerodynamic characteristics (resistance coefficient, lift resistance ratio etc.), needs
Carry out aerodynamic test in low density wind tunnel and carrys out Accurate Prediction its aerodynamic characteristics.Such aircraft using lifting body shape come
It realizes and glides over long distances, aerodynamic loading pole mismatches, compared with previous low density wind tunnel typical load cell test model, on the one hand
It is required that the component accurately measured is more, previous low density wind tunnel test model is generally simple body of revolution, only need to accurately measure
Longitudinal three-component, and lifting body mode shape is complicated, and require six component load of accurate measurement；On the other hand due to lifting body outside
Shape model aerodynamic loading pole mismatches, and normal load and pitching moment load are relatively large, the phases such as axial load, rolling moment
To smaller.Previous force balance element design generally uses combined type balance component placement, axial force element to occupy setting for balance
Meter center, measurement beam direction is identical as normal load direction, then axial component output is interfered tight by big normal direction/pitching moment component
Weight, it is difficult to meet the high-acruracy survey requirement of lifting body contour model aerodynamic force.With being symmetricly set on before and after balance design center
Balance measurement element measure the load of remaining component in addition to axial force simultaneously, since the same section of balance measurement element will be surveyed
Multiple aerodynamic loads are measured, then smaller rolling moment component sensitivity is relatively low, by normal component serious interference, it is difficult to meet
The high-acruracy survey requirement of lifting body contour model aerodynamic force.
Low density wind tunnel aerodynamics force measurement has the characteristics that load is small, model is small, flow field temperature is high, interference signal is strong, and
The high lift-drag ratio characteristic of lifting body contour model can also cause serious each component loaded matching problem.In order to realize to lifting body
The fine measurement of contour model aerodynamic force, force balance must solve big normal load to axial component, rolling moment component
Interference, high temperature flow field are to difficulties such as the temperature effects of balance.
When carrying out dynamometer check in low density wind tunnel, flow field total temperature is higher (600K-1700K), and test model is by flow field
Temperature after heating is higher, can by the connecting portion of model and balance by heat transfer to day flat elements, on the other hand due to balance
Support sting is exposed in high temperature flow field and is heated, and heat can also be transmitted to a day flat elements, the output to force balance by support sting
Very serious temperature interference is caused, the reliability of test data is directly influenced.Traditional solar heat protection measure is in balance and model
Between insulation bushing is set, day flat elements are wrapped up, so that balance measurement element is completely cut off as possible with environment temperature, makes to answer
Becoming piece to work in the metastable normal temperature range in temperature field, such method requires have larger model inner space, but
It contracts for low density wind tunnel lifting body contour model smaller than rear size, for the narrow space of balance installation, it is difficult to real
The installation of existing insulation bushing；For the support sting that is exposed in flow field generally at the trial in the several layers of heat-insulating cloths of its surface wrap,
To block heating of the high temperature gas flow to balance strut, but due to being interim winding by hand, surface is relatively rough, and bad fixation,
It is easy to be blown off by air-flow when experiment, need to often open test chamber door and rewind, influence test efficiency.
Utility model content
The purpose of this utility model is to provide a kind of small-range high lift-drag ratio force balances, solve typical load cell balance axis
The problem being difficult to realize to load, the disadvantage of rolling moment measurement accuracy deficiency and the anti-provision for thermal insulation of small-scale model meets
Complicated lifting body shape aerospace craft low density wind tunnel aerodynamic test measurement request.
One purpose of the utility model is to solve at least the above and/or defect, and provide and at least will be described later
The advantages of.
In order to realize these purposes and other advantages according to the present utility model, provide a kind of applied to low density wind tunnel
Small-range high lift-drag ratio force balance, including：Balance main body is disposed with model connecting pin, the first measurement in a closed series thereon
Element, axial force measuration element, rolling moment measuring cell, the second measurement in a closed series element and strut；
The model connecting pin has cone structure；One end of the model connecting pin is provided with stretching screw；The mould
Type is provided with positioning key on connecting pin；
The first measurement in a closed series element is single-column beam type measurement in a closed series element；The single-column beam type measurement in a closed series element
It is mounted on strain ga(u)ge on four faces；The first measurement in a closed series element is normal force, pitching moment, lateral force, yaw
Torque measurement in a closed series element；
The axial force measuration element is the vertical girder structure of " I " font, and the axial force measuration element includes：Cylinder
Matrix and the supporting beam being arranged in cylinder matrix and measurement beam；The cylinder matrix passes through axial force measuration member by one
The upper and lower perforative skewed slot at part center is divided into two parts；Two parts are linked to be an entirety by the measurement beam and supporting beam；It is described
Strain ga(u)ge is installed on the measurement beam of axial force measuration element；
The rolling moment measuring cell is three column girder structure of " small " font；The three column girder structure of " small " font
Intermediate beam longitudinal direction takes larger thickness, symmetrical two column beams to be arranged vertically, and longitudinal direction takes smaller thickness；Institute
It states and strain ga(u)ge is installed on two column beams；
The second measurement in a closed series element is single-column beam type composition element；Four of the single-column beam type measurement in a closed series element
Strain ga(u)ge is mounted on face；The second measurement in a closed series element is normal force, pitching moment, lateral force, yawing
Measurement in a closed series element；
The strut includes the straight cylinders such as strut set gradually section, strut conical end and strut connecting pin；The strut
Positioning spline is provided in conical end.
Preferably, the intermediate beam of the rolling moment measuring cell is from two beams are divided longitudinally into, and two beams are at a distance of 1mm.
Preferably, the supporting beam of the axial force measuration element and measurement beam direction use lateral arrangement and normal load
Vertically.
Preferably, the axial force measuration element by 2 measure beams and 8 support beam groups at；Every 2 of the supporting beam
Parallel connection together, and be symmetrically arranged at the longitudinally asymmetric face of balance both sides and axial member center it is front and back；It is described
It is by the vertical balance axis in center of axial force measuration element and symmetrical about balance longitudinal surface to measure beam.
Preferably, it is provided with insulation bushing on the model connecting pin；It is processed into cone in the outer surface of the insulation bushing
Face is matched with the cone structure of model connecting pin, and the inner surface of the insulation bushing is processed into cylinder and the interference of model connecting pin
Cooperation, the positioning key are interference fitted across insulation bushing and balance and are connected on balance.
Preferably, heat-insulating cloth is fixedly installed by the cured technology of heat zone on the strut.
The utility model includes at least following advantageous effect：The small-range high lift-drag ratio force balance of the utility model is set
Meter load and appearance and size fully meet lift body complex appearance model low density wind tunnel dynamometer check requirement, belong to Special hoist
Flat, which is effectively improved the test capability of low density wind tunnel, while the utility model improves axial force measuration precision
And anti-interference ability；Improve rolling moment sensitivity and measurement accuracy.
Part is illustrated to embody by the further advantage, target and feature of the utility model by following, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Description of the drawings：
Fig. 1 is the overall structure of the small-range high lift-drag ratio force balance described in the utility model applied to low density wind tunnel
Schematic diagram；
Fig. 2 is the structural schematic diagram of axial force measuration element described in the utility model；
Fig. 3 is the schematic diagram of A-A sections in Fig. 2；
Fig. 4 is the structural schematic diagram of measurement in a closed series element described in the utility model, rolling power measuring cell；
Fig. 5 is the schematic diagram of B-B sections in Fig. 4；
Fig. 6 is the schematic diagram of C-C sections in Fig. 4；
Fig. 7 is the insulation bushing structural schematic diagram of model connecting pin；
Fig. 8 is the heat insulation structural schematic diagram of strut.
Specific implementation mode：
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art with reference to explanation
Book word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Lifting body complex appearance determines that the high lift-drag ratio feature of its aerodynamic characteristics, aerodynamic loading pole mismatch, method
Relatively large to power and pitching moment load, axial load, rolling moment etc. are relatively small.Traditional balance component placement is generally adopted
With combined type balance component placement, with the balance measurement element being symmetricly set on before and after balance design center while measuring and remove axial direction
The load of remaining five component outside power.Since the design range of each component of high lift-drag ratio force balance mismatches very much, if according to
Traditional balance component placement designs high lift-drag ratio force balance, in the multiple aerodynamic loads of same section gauge, then to compared with
Element rigidity is bigger than normal for small rolling moment, and sensitivity is relatively low, it is difficult to obtain ideal rolling moment signal output.In order to carry
High rolling moment element measurement sensitivity, in high lift-drag ratio force balance component placement, rolling moment component structure can be as axis
It is arranged to independent element like that power element, series arrangement, such rolling is carried out with axial force element and measurement in a closed series element
The measurement of torque be it is independent, it is only more sensitive to the rolling moment to be surveyed, and to the load of other components then relative insensitivity, because
This be easy to get required sensitivity and it is smaller interfere with each other, to improve its measurement accuracy.It is relatively large in order to reduce
The interference to axial force component and rolling moment component of normal force and pitching moment load, by axial force measuration element and rolling
Torgue measurement element is arranged among balance measurement element, and both ends are symmetrical arranged measurement in a closed series element, and axial force is removed for measuring
With four components of remaining except rolling moment.
Fig. 1~6 show a kind of small-range high lift-drag ratio force balance applied to low density wind tunnel of the utility model,
Including：Balance main body is disposed with model connecting pin 4, the first measurement in a closed series element 5, axial force measuration element 6, rolling thereon
Torque measuring cell 7, the second measurement in a closed series element 50 and strut；
The model connecting pin 4 has cone structure；One end of the model connecting pin 4 is provided with stretching screw 1；It is described
Positioning key 2 is provided on model connecting pin 4；
The first measurement in a closed series element 5 is single-column beam type measurement in a closed series element；The single-column beam type measurement in a closed series element
Four faces on be respectively connected with strain ga(u)ge；The first measurement in a closed series element 5 be normal force, pitching moment, lateral force, partially
Navigate torque measurement in a closed series element；
As shown in figures 2-3, the axial force measuration element 6 is the vertical girder structure of " I " font, the axial force measuration
Element 6 includes：Cylinder matrix 63 and the supporting beam 61 being arranged in cylinder matrix 63 and measurement beam 62；The cylinder base
Body 63 passes through the upper and lower perforative skewed slot 64 at 6 center of axial force measuration element to divide for two parts by one；(the "upper" carried herein
Refer to positioning key as shown in Figure 12 it is "upper" upwards) two parts are linked to be an entirety by the measurement beam 62 and supporting beam 61；Institute
It states and connects strain ga(u)ge on the measurement beam 62 of axial force measuration element 6；
The rolling moment measuring cell 7 is three column girder structure of " small " font；The three column girder structure of " small " font
71 longitudinal direction of intermediate beam take larger thickness, symmetrical two column beams 72 to be arranged vertically, longitudinal direction takes smaller
Thickness；Strain ga(u)ge is connected on 72 beam of described two columns；In order to reduce interference of normal direction (pitching moment) load to it, improve
Its longitudinal rigidity, intermediate beam longitudinal direction (normal orientation) take larger thickness, symmetrical two column beams to be arranged vertically, and indulge
Smaller thickness is taken to direction, foil gauge is installed on symmetrical two column beams, under the action of rolling moment load, production
The composite deformation of raw bending and torsion measures rolling moment using flexural deformation.
The second measurement in a closed series element 50 is single-column beam type composition element；The four of the single-column beam type measurement in a closed series element
It is respectively connected with strain ga(u)ge on a face；The second measurement in a closed series element is normal force, pitching moment, lateral force, yaw forces
Square measurement in a closed series element；
The strut includes the straight cylinders such as strut set gradually section 9, strut conical end 10 and strut connecting pin 12；It is described
Positioning spline 11 is provided in strut conical end 10.
In the present invention, it is the installation positioning accuracy for improving between force balance and strut, erection stress is avoided to pass
It is delivered on day flat elements, and prevents the measurement error that mechanical connection loosens and generates, balance measurement element is integrated with strut to be set
Meter processing, is process by whole block material.
In the above-mentioned technical solutions, balance measurement element (including the first measurement in a closed series element 5, axial force measuration element 6,
Rolling moment measuring cell 7, the second measurement in a closed series element 50) intersection point of lateral symmetry axis and longitudinally asymmetric axis is in balance design
The heart.First measurement in a closed series element 5 and the second measurement in a closed series element 50 are single-column beam type composition element, about balance design center
It is arranged symmetrically.The advantages of this composition element structure type is simple in structure, and rigidity is big, handling ease, high sensitivity.First group
It closes and is mounted on strain ga(u)ge on four faces of measuring cell and the second measurement in a closed series element, favour is formed by strain ga(u)ge
The strain value for measuring beam is converted into electric signal output by this electric bridge, then acts on aircraft using formula acquisition according to balance
Aerodynamic loading on model completes the measurement of remaining four component in addition to axial force and rolling moment.
In the above-mentioned technical solutions, such as Fig. 4~6, the intermediate beam 71 of the rolling moment measuring cell 7 is from longitudinal direction (normal direction
Direction) it is divided into two beams, two beams are at a distance of 1mm.In this way, rigidity of the intermediate beam with respect to rolling moment component is reduced,
The sensitivity that rolling moment measures beam is improved, the thickness of its longitudinal direction is kept, reduces the thickness of its Z-direction, in this way, rolling power
The existing preferable longitudinal load-bearing ability of square element, and have relatively high rolling moment measurement sensitivity.
In the above-mentioned technical solutions, the supporting beam 61 of the axial force measuration element 6 and 62 direction of measurement beam are using laterally
Arrangement is vertical with normal load.In order to further decrease interference of the big normal load to it, 62 direction of supporting beam 61 and measurement beam
It is vertical with normal load using lateral arrangement, to improve the ability of its anti-normal load interference.
In the above-mentioned technical solutions, the axial force measuration element by 2 measure beams and 8 support beam groups at；The branch
It supports beam every 2 parallel connections together, and is symmetrically arranged at both sides and the axial member center in the longitudinally asymmetric face of balance
It is front and back；It is described that measure beam by the vertical balance axis in center of axial force measuration element and symmetrical about balance longitudinal surface.Support
On the one hand beam plays a supportive role, improve the rigidity of balance, on the other hand serve to disappear and disturb, and reduces normal load to axial force measuration
The interference of element, while intermal force is played again, the aerodynamic load that will act on model is transmitted to measuring cell.Supporting beam is every
2 parallel connections together, and be symmetrically arranged at the longitudinally asymmetric face of balance both sides and axial member center it is front and back；It surveys
It is by the vertical balance axis in center of axial force element and symmetrical about balance longitudinal surface to measure beam, surveys on beam for every and is mounted on electricity
Strain gauge is hindered, form resistance bridge by strain ga(u)ge is converted into electric signal output by the strain value for measuring beam, then root
It obtains acting on the axial load on dummy vehicle using formula according to balance, completes the measurement of axial load.
In the above-mentioned technical solutions, it is provided with insulation bushing on the model connecting pin；The outer surface of the insulation bushing
It is processed into the conical surface to match with the cone structure of model connecting pin, the inner surface of the insulation bushing is processed into cylinder and with model connects
End interference fit is connect, the positioning key is interference fitted across insulation bushing and balance and is connected on balance.
In the above-mentioned technical solutions, heat-insulating cloth is fixedly installed by the cured technology of heat zone on the strut.
Since experimental flow field total temperature is higher, on the one hand high temperature gas flow gives heat transfer to balance member by test model when experiment
On the other hand part is heated since force balance strut is exposed in high temperature flow field, heat can also be transmitted to balance member by strut
Part, if not taking appropriate measures, balance measurement component temperature can increase, to make the strain gauge being installed on it generate thermal output
And certain error is brought to measuring, measurement result is influenced, here it is the temperature effects of force balance.Reduce or even eliminate survey
On the one hand the temperature effect of power balance will prevent heat transfer of the test model to force balance, on the other hand block high temperature gas flow
Heating to strut.Test model is by heat transfer by model connecting pin to force balance, then can be in model and model
An insulation bushing 3 is designed between connecting pin, but due to being limited by the model space, complexity can not possibly be taken between balance and model
Provision for thermal insulation can design a simple insulation bushing and be connected in balance in order to reach heat insulation, and again simple and practicable
On, insulation bushing outer surface is processed into the conical surface and is matched with the cone structure of model connecting pin, and inner surface is processed into cylinder and mould
Type connecting pin 4 is interference fitted, and the positioning key 2 of balance and model is interference fitted across insulation bushing and balance and is connected in balance
On.It is not only easily installed in this way, but also plays heat-insulated effect, to prevent test model from giving heat transfer to day flat elements, see Fig. 7.
It is previous to use by hand outside the balance strut in exposure high temperature flow field temporarily in order to block heating of the high temperature gas flow to balance strut
The several layers of heat-insulating cloths of surface wrap are often blown off due to winding is not firm by test air-flow.In order to solve this drawback, when balance is processed
The balance strut (straight cylinders section 9 and the conical section 10 such as including strut) that will be just exposed in high temperature flow field uses High temperature epoxy resins
Heat-insulating cloth is fixed on support sting as bonding agent using the cured technology of heat zone by glue, make its with force balance strut at
Be integrated, avoid because winding heat-insulating cloth by hand is not firm blown off by test air-flow the drawbacks of, simultaneously because using height
Temperature lamination curing technology, surface also relative smooth, and thickness is uniform, sees Fig. 8.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (6)
1. a kind of small-range high lift-drag ratio force balance applied to low density wind tunnel, which is characterized in that including：Balance main body,
It is disposed with model connecting pin, the first measurement in a closed series element, axial force measuration element, rolling moment measuring cell, thereon
Two measurement in a closed series elements and strut；
The model connecting pin has cone structure；One end of the model connecting pin is provided with stretching screw；The model connects
It connects and is provided with positioning key on end；
The first measurement in a closed series element is the first single-column beam type measurement in a closed series element；The first single-column beam type measurement in a closed series member
It is mounted on strain ga(u)ge on four faces of part；The first measurement in a closed series element be normal force, pitching moment, lateral force,
Yawing measurement in a closed series element；
The axial force measuration element is the vertical girder structure of " I " font, and the axial force measuration element includes：Cylinder matrix
With the supporting beam and measurement beam being arranged in cylinder matrix；The cylinder matrix is passed through by one in axial force measuration element
The upper and lower perforative skewed slot of the heart is divided into two parts；Two parts are linked to be an entirety by the measurement beam and supporting beam；The axial direction
Strain ga(u)ge is installed on the measurement beam of power measuring cell；
The rolling moment measuring cell is three column girder structure of " small " font；The centre of the three column girder structure of " small " font
Beam longitudinal direction takes larger thickness, symmetrical two column beams to be arranged vertically, and longitudinal direction takes smaller thickness；Described two
Strain ga(u)ge is installed on a column beam；
The second measurement in a closed series element is the second single-column beam type measurement in a closed series element；The second single-column beam type measurement in a closed series member
It is mounted on strain ga(u)ge on four faces of part；The second measurement in a closed series element be normal force, pitching moment, lateral force,
Yawing measurement in a closed series element；
The strut includes the straight cylinders such as strut set gradually section, strut conical end and strut connecting pin；The strut circular cone
Positioning spline is provided on end.
2. being applied to the small-range high lift-drag ratio force balance of low density wind tunnel as described in claim 1, which is characterized in that institute
The intermediate beam of rolling moment measuring cell is stated from two beams are divided longitudinally into, two beams are at a distance of 1mm.
3. being applied to the small-range high lift-drag ratio force balance of low density wind tunnel as described in claim 1, which is characterized in that institute
Stating the supporting beam of axial force measuration element and measuring beam direction uses lateral arrangement vertical with normal load.
4. being applied to the small-range high lift-drag ratio force balance of low density wind tunnel as described in claim 1, which is characterized in that institute
State axial force measuration element by 2 measure beams and 8 support beam groups at；Every 2 parallel connections of supporting beam together, and divide
Be not symmetricly set on the longitudinally asymmetric face of balance both sides and axial member center it is front and back；The measurement beam passes through axial force measuration
The vertical balance axis in center of element is simultaneously symmetrical about balance longitudinal surface.
5. being applied to the small-range high lift-drag ratio force balance of low density wind tunnel as described in claim 1, which is characterized in that institute
It states and is provided with insulation bushing on model connecting pin；It is processed into the conical surface of the conical surface and model connecting pin in the outer surface of the insulation bushing
Structure matches, and the inner surface of the insulation bushing is processed into cylinder and is interference fitted with model connecting pin, and the positioning key passes through
Insulation bushing is interference fitted with balance and is connected on balance.
6. being applied to the small-range high lift-drag ratio force balance of low density wind tunnel as described in claim 1, which is characterized in that institute
It states and heat-insulating cloth is fixedly installed by the cured technology of heat zone on strut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820072786.1U CN207717327U (en) | 2018-01-16 | 2018-01-16 | Small-range high lift-drag ratio force balance applied to low density wind tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820072786.1U CN207717327U (en) | 2018-01-16 | 2018-01-16 | Small-range high lift-drag ratio force balance applied to low density wind tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181083A (en) * | 2018-01-16 | 2018-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Small-range high lift-drag ratio force balance applied to low density wind tunnel |
| CN112539907A (en) * | 2020-12-07 | 2021-03-23 | 中国航天空气动力技术研究院 | Double-board skiing wind tunnel test supporting and measuring device |
| CN114323546A (en) * | 2022-03-07 | 2022-04-12 | 中国空气动力研究与发展中心高速空气动力研究所 | High-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials |
| CN114964706A (en) * | 2022-04-18 | 2022-08-30 | 中国船舶科学研究中心 | Device and method for measuring high-speed outflow drag reduction effect |
-
2018
- 2018-01-16 CN CN201820072786.1U patent/CN207717327U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181083A (en) * | 2018-01-16 | 2018-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Small-range high lift-drag ratio force balance applied to low density wind tunnel |
| CN112539907A (en) * | 2020-12-07 | 2021-03-23 | 中国航天空气动力技术研究院 | Double-board skiing wind tunnel test supporting and measuring device |
| CN114323546A (en) * | 2022-03-07 | 2022-04-12 | 中国空气动力研究与发展中心高速空气动力研究所 | High-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials |
| CN114964706A (en) * | 2022-04-18 | 2022-08-30 | 中国船舶科学研究中心 | Device and method for measuring high-speed outflow drag reduction effect |
| CN114964706B (en) * | 2022-04-18 | 2023-05-12 | 中国船舶科学研究中心 | High-speed outflow drag reduction effect measuring device and measuring method |
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