Mute wind tunnel sprayer nozzle with adjustable suction flow
A quiet, wind tunnel technology, applied in the direction of measuring devices, machine/structural component testing, instruments, etc., can solve the problem of non-adjustable suction flow, improve test ability and level, change turbulence, improve performance and flow field quality effect
Active Publication Date: 2018-11-06
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0007] The invention provides a silent wind tunnel nozzle with adjustable suction flow rate to solve the technical problem that the suction flow rate of the suction slot of the existing wind tunnel nozzle cannot be adjusted
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[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0030] refer to figure 2 , the preferred embodiment of the present invention provides a silent wind tunnel nozzle with adjustable suction flow rate, comprising: a contraction section 10 and an expansion section 20 arranged in sequence along the incoming flow direction, and the inlet end of the expansion section 20 is arranged along the axial direction It extends into the outflow end of the constriction section 10, and the communication transition between the expansion section 20 and the constriction section 10 is arranged along the radial direction of the quiet wind tunnel nozzle and used in the turbulent boundary layer for the development of the wall surface of the constriction section 10. The suction slit 30 of the turbulent flow that sucks outwa...
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The invention discloses a mute wind tunnel sprayer nozzle with the adjustable suction flow. A suction slot that is used for outward suction of a turbulent flow in a turbulent flow boundary layer developed along the wall surface of a contraction segment is arranged at a connection transition part between an expansion segment and the contraction segment radially along the wind tunnel sprayer nozzle.An outwardly protruding adjusting flange and a suction adjusting ring element are arranged at the outer circle of an inlet end of the expansion segment. The end surface of a first end of the suctionadjusting ring element is connected with the end surface of an outlet end of the contraction segment in a sealing manner, so that suction gas from the suction slot is extracted outwardly through the suction adjusting ring element. A second end of the suction adjusting ring element cooperates with the adjusting flange; and the suction gas flow by the suction slot is controlled by adjusting the suction adjusting ring element or enabling the expansion segment to make relative translation movement along the axial direction. According to the invention, the performance and flow field quality of themute wind tunnel sprayer nozzle are improved by adjusting the suction flow of the suction slot; and the turbulent degree of the flow field of the mute sprayer nozzle is changed by changing the suctionflow of the suction slot.
Description
technical field [0001] The invention relates to the field of wind tunnel nozzles, in particular to a silent wind tunnel nozzle with adjustable suction flow. Background technique [0002] Wind tunnels are widely used in model experiments of missiles, high-speed aircraft, artificial satellites, space shuttles, and aerospace aircraft. They are very important aerodynamic ground simulation test equipment in the aerospace field. Ordinary supersonic and hypersonic wind tunnel flow fields have relatively high aerodynamic noise and turbulence, which are 1 to 2 orders of magnitude larger than the "quiet" flow field in the upper atmosphere. Therefore, the model was tested in a conventional wind tunnel, and some test results The accuracy of the aircraft seriously deviates from the real situation, which affects the design indicators of aircraft and so on. [0003] Since there are significant differences between the laminar boundary layer and the turbulent boundary layer in terms of heat...
Claims
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Login to View More IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 易仕和陆小革何霖冈敦殿
Owner NAT UNIV OF DEFENSE TECH