Distance adjusting device for double-cone configuration diffuser and spray pipe of hypersonic wind tunnel

Abstract

The invention discloses a distance adjusting device for a double-cone configuration diffuser and a spray pipe of a hypersonic wind tunnel. The distance adjusting device comprises a sliding cone section, a fixed cone section, a sealing ring, a supporting mechanism and a sliding rail. The fixed cone section is arranged on the sliding cone section in a sleeving mode, and the fixed cone section and the sliding cone section are sealed through the sealing ring; and the sliding cone section is placed on the supporting mechanism, the gravity center position of the sliding cone section coincides with the center line of the supporting mechanism, the supporting mechanism is installed on the sliding rail, the sliding rail is welded to the lower wall face of the test section, and the supporting mechanism moves forwards and backwards on the sliding rail to drive the sliding cone section to move forwards and backwards in the fixed cone section to adjust the distance between the sliding cone section and the spray pipe. The distance adjusting device is simple in structure and low in manufacturing cost; the use process is convenient, efficient and safe, the adjustment time can be greatly shortened,and the test preparation efficiency is improved; the configuration of the diffuser contraction section is convenient to adjust, the adjusting range of the distance between the diffuser and the spray pipe is large, and wind tunnel test requirements can be flexibly met.

Description

technical field [0001] The invention belongs to the technical field of hypersonic wind tunnel equipment, and in particular relates to a distance adjustment device for a hypersonic wind tunnel double-cone configuration diffuser and a nozzle. Background technique [0002] The main function of the hypersonic free-jet wind tunnel diffuser is to decelerate and pressurize the hypersonic flow at the outlet of the nozzle to increase the static pressure at the diffuser outlet, and isolate the influence of the downstream back pressure of the diffuser on the wind tunnel flow field. Maintain the normal operation of the wind tunnel. Hypersonic free-jet wind tunnel diffusers are usually designed as a combination of "contraction section-equal straight section-expansion section". [0003] During the operation of a hypersonic free-jet wind tunnel, usually a diffuser needs to be adapted to nozzles of different Mach numbers, models of different scales and ranges of attitude changes, and also ...

AI Technical Summary

Problems solved by technology

[0006] 1) To adjust the configuration and △d of the constricted section of the diffuser, it is necessary to disassemble and install multiple parts of the diffuser, which is time-consuming and labor-intensive;

[0007] 2) The adjustment of △d is a discrete point, and the continuous adjustment of △d cannot be realized;

[0008] 3) In order to adjust the configuration and △d of the diffuser constriction section, multiple replaceable diffuser constriction sections need to be configured, and the cost is relatively high;

[0009] 4) During the adjustment process, the related parts of the diffuser need to be hoisted by crane, and due to the limitation of the compression distance of the bellows in the hypersonic free-jet wind tunnel, there may be bumps between parts during the disassembly and installation of the related parts of the diffuser. The risk of component damage and certain safety hazards

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