Anti-smashing device with low turbulent flow and applied to ventilation model internal resistance measurement
A technology of anti-smashing and internal resistance, which is applied in the field of internal resistance measurement protection device and low-turbulence anti-smashing device of sub-span super wind tunnel ventilation model, which can solve the problem of flattening the bottom of the ventilation model, so as to ensure the repeatability of installation and the structure Good strength, the effect of reducing air flow interference
Active Publication Date: 2019-04-05
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
[0004] The technical problem of the present invention is: to overcome the deficiencies of the prior art, a low-turbulence anti-smashing device applied to the measurement of the internal resistance of the ventilation model is proposed, which solves the problem of protecting the pressure measuring device in the ventilation force measurement wind tunnel test because the ventilation model Shaking caused the problem of being flattened by the bottom of the ventilated model
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[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0033] Such as figure 1 As shown, a low-turbulence anti-smashing device applied to the measurement of the internal resistance of the ventilation model, the anti-smashing ring device 5 includes the main body 1 and the antennae 2 of the anti-smashing ring. During air force testing, such as Figure 7 and Figure 8 As shown, the ventilation model 4 is connected to the support rod 8 through the balance 9, the air flow enters the ventilation model 4 from the inlet, flows out from the bottom, and then the outlet pressure is collected by the pressure measuring tube 6 at the bottom of the ventilation model 4, and the internal pressure of the ventilation model 4 is calculated. resistance. The anti-smashing device 5 and the support rod 8 of th...
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Abstract
The invention discloses an anti-smashing device with low turbulent flow and applied to ventilation model internal resistance measurement. The anti-smashing device comprises an anti-smashing ring mainbody and tentacles; the anti-smashing ring main body is a hollow cylinder, multiple tentacles are uniformly distributed on an axial direction of an outer wall of the hollow cylinder; the anti-smashingring main body and the tentacles are integrated; the anti-smashing ring main body is fixed on an outer fulcrum bar; the section of each tentacle along a thickness direction is composed of a wedge shape and a rectangle, a small end of the wedge shape is towards a flow incoming direction of the gas, the value range of the wedge angle is less than or equal to 30 DEG, the height of each tentacle is 1.5-1.7 times of the outer diameter of an outer piezometric tube. The anti-smashing device disclosed by the invention is simple in structure, convenient to dismount, and can guarantee that a gap of thepiezometric tube between the model bottom and the fulcrum bar cannot be smashed when the ventilating model swings; the anti-smashing ring is small in thickness and thin in tentacle, the influence onthe model bottom outlet pressure measurement is small, and wind tunnel test quality is improved.
Description
technical field [0001] The invention relates to a low-turbulence anti-smashing device applied to the measurement of the internal resistance of the ventilation model, which is used to protect the pressure measuring device from being smashed flat by the bottom of the ventilation model due to the shaking of the model when it is used for the measurement of the internal resistance of the ventilation model force test in a wind tunnel, especially The invention relates to a protective device for measuring the internal resistance of a ventilation model of a sub-span super wind tunnel, and belongs to the technical field of sub-span super wind tunnel experiments and the field of test aerodynamics. Background technique [0002] The ventilation model dynamometer test is a routine test in the wind tunnel test, which can simulate the shape of the air intake and correctly obtain the amount of interference it has on aircraft components. The internal flow resistance of the ventilation model i...
Claims
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Login to View More IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 唐亚丽何敬玉
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS