Air entraining pipe

Abstract

The invention belongs to the technical field of compressor last-stage cascade channel air entraining pipe design, and particularly relates to an air entraining pipe. The front edge of the section of the air entraining end of the air entraining pipe is semi-oval, and the air entraining pipe can be arranged between two adjacent stator blades of a compressor last-stage cascade channel and is connected with a pressure test instrument so as to monitor whether a compressor surges or not in real time. The air entraining end of the air entraining pipe is arranged between the two adjacent stator bladesof the compressor last-stage cascade channel, so that the streaming degree of air flow at the front edge can be reduced, the front edge peak Mach number is reduced, a local super-sound area is reduced, the occupied circulation area of the cascade channel is reduced, and the circulation capacity of the cascade channel is ensured.

Description

technical field [0001] The application belongs to the technical field of designing an air-inducing pipe for a cascade passage of a compressor, and in particular relates to an air-inducing pipe. Background technique [0002] In order to ensure that the engine is in a stable working state, it is necessary to monitor in real time whether the compressor is surged. For this reason, more pressure test instruments are installed to monitor the pressure of the last-stage blade cascade channel of the compressor through the bleed pipe. If the last-stage stator of the compressor is monitored If the cascade pressure exceeds the threshold value, it is considered that the compressor is in surge. This technical solution requires that the air-induction end of the air-induction pipe be arranged between two adjacent stator blades in the cascade passage of the compressor. Currently, the cross-section of the air-induction pipe end The leading and trailing edges are mostly designed as circular ar...

AI Technical Summary

Problems solved by technology

[0003] 1) Occupying a large flow area of ​​the cascade passage, seriously reducing the effective flow area of ​​the cascade passage, resulting in a reduction in the flow capacity of the cascade passage;

[0004] 2) The trailing edge produces a strong wake area, forming a large-scale low-pressure area, with uneven flow velocity distribution and large total pressure loss, such as Figure 2-4 shown

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