Variable-length tubular vortex reducer system of aero-engine compressor

Abstract

The invention discloses an aero-engine compressor variable-length tubular vortex reduction device system which comprises an upstream compressor disc, a downstream compressor disc, a drum and a vortex reduction device, the drum is arranged between the upstream compressor disc and the downstream compressor disc, and the drum, the upstream compressor disc and the downstream compressor disc form a disc cavity of a compressor; the vortex reduction device comprises a chuck and a plurality of vortex reduction pipes arranged on the side wall of the chuck in the circumferential direction, the chuck is arranged in the disc cavity, the two ends of the chuck are connected with the upstream gas compressor disc and the downstream gas compressor disc correspondingly, and the vortex reduction pipes are of pipe body structures which are hollow and adjustable in length; the vortex reduction pipe is designed to be of a structure with the pipe length capable of being changed, so that the vortex reduction pipe can adjust the inlet and outlet positions according to the real-time working condition of an engine, the separation vortex formed by airflow at the inlet of the vortex reduction pipe is reduced, cooling gas meeting the corresponding pressure is provided according to the requirement of a high-temperature component, and the cooling efficiency is improved. And the vortex reduction tube has good vortex reduction performance in the whole flight envelope.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to an aero-engine compressor variable-length tubular vortex reducer system. Background technique [0002] The cold air of the aero-engine internal air cooling system is drawn from the intermediate stage of the compressor. On the one hand, this part of the cold air is used to cool high-temperature components such as turbine blades, casings, discs, shafts and bearings, so that they can work under the allowable temperature state and ensure the pressure of the intake air in the relevant parts; on the other hand, the cold air will It is used for sealing to prevent the backflow of gas; at the same time, the cold air is also used to maintain the pressure of the unloading chamber, so as to meet the requirements of the axial force of the engine. However, a large amount of bleed air will reduce the overall efficiency of the engine and increase the fuel consumption, so the flow of cold a...

AI Technical Summary

Problems solved by technology

Since the working conditions of the engine will continue to change during the entire working process, the existing straight tube vortex reducer has an ideal drag reduction effect only in a certain working condition or a small range of working conditions due to its fixed structure , when deviating from the design working condition, because the gas in the chamber has a relatively large circumferential velocity relative to the vortex reducer, when entering the vortex reducer, flow separation will occur at the inlet of the vortex reducer, resulting in a large pressure loss

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