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Subsonic-speed jet type pneumatic probe calibration wind tunnel

A jet-type, subsonic technology, applied in aerodynamic tests, measuring devices, instruments, etc., can solve the problems of large area, high operating cost, large volume, etc., and achieve low operating cost, low cost, and land occupation The effect of area reduction

Pending Publication Date: 2018-10-26
大连凌海华威科技服务有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the defects of the prior art, the present invention provides a subsonic jet type pneumatic probe calibration wind tunnel, which can produce a stable high Mach flow (up to 0.9Ma) in a smaller hole size, Solve the problems of most subsonic calibration wind tunnels with large volume, large floor space, and high operating costs, and have higher flexibility and ease of use

Method used

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Embodiment 1

[0036] The subsonic jet type pneumatic probe calibration wind tunnel is characterized in that: it includes an inlet expansion section 1, a steady flow section 2, a contraction section 3 and an experimental section 4 connected in sequence; the inlet expansion section 1 gradually expands from the end to the steady flow section , the contraction section 3 gradually shrinks from the steady flow section 2 to the experimental section 4; the inlet diversion cone 5 is set on the inlet expansion section 1, and the steady flow section 2 includes an outer ring 6 arranged in sequence along the wind flow direction, The honeycomb 7 and a number of inner rings and broken vortex nets arranged at intervals; the total pressure probe mounting seat 8 is arranged on the contraction section 3 close to the flow stabilization section 2, and the static pressure hole is arranged on the contraction section 3 away from the flow stabilization section 2 9.

[0037] Further, the inlet expansion section 1 , ...

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Abstract

The invention belongs to the field of pneumatic probe calibration wind tunnels and particularly relates to a subsonic-speed jet type pneumatic probe calibration wind tunnel capable of increasing inflow velocity. The subsonic-speed jet type pneumatic probe calibration wind tunnel comprises an inlet expansion section, a flow stabilizing section, a contraction section and an experiment section whichare sequentially connected and is characterized in that the inlet expansion section gradually expands from the end to the flow stabilizing section, and the contraction section gradually contracts fromthe flow stabilizing section to the experiment section; the inlet expansion section is provided with an inlet sprue spreader, the flow stabilizing section comprises an outer annular sleeve, a cellular device, a plurality of inner annular sleeves and a vortex breaking net which are sequentially arranged, and the inner annular sleeves are arranged at intervals; the contraction section is provided with a total pressure probe mounting seat close to the flow stabilizing section, and the contraction section is provided with a static vent away from the flow stabilizing section. The subsonic-speed jet type pneumatic probe calibration wind tunnel has the advantages that the size and floor space of the wind tunnel are reduced, and the wind tunnel is easy in mounting and layout; after the contraction ratio of the wind tunnel and the size of each unit are reasonably designed, large inflow Mach number can be achieved under low motor power.

Description

technical field [0001] The invention belongs to the field of pneumatic probe calibration wind tunnels, in particular to a subsonic jet flow type pneumatic probe calibration wind tunnel capable of increasing incoming flow velocity. Background technique [0002] Wind tunnel: The wind tunnel laboratory is a pipe-shaped experimental device that artificially generates and controls airflow to meet the needs of a specific flow field and then simulates the flow of air around an aircraft or entity. Calibration wind tunnel is a kind of wind tunnel, which can generate uniform and stable airflow with certain pressure and velocity to meet the needs of pneumatic probe calibration. [0003] Wind tunnel experiment is an indispensable and important part in the field of aerodynamics and related mechanical research. Wind tunnel experiments in fluid mechanics are mainly divided into force measurement experiments, pressure measurement experiments and temperature measurement experiments. Pneuma...

Claims

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Application Information

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IPC IPC(8): G01M9/02
CPCG01M9/02
Inventor 陆华伟王宇郭爽杨益
Owner 大连凌海华威科技服务有限责任公司
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