An over-pre-swirling vane-shaped receiving hole for equal-radius pre-swirling air supply system

Abstract

The invention relates to an over-pre-rotation vane type receiving hole for an equal-radius pre-rotation air supply system. A plurality of over-pre-rotation vane type acceptance holes are evenly distributed on the surface of a cover plate in the pre-rotation air supply system. The entrance to the outlet of each pre-rotating vane-shaped receiving hole is a curved surface that deflects and bends in the circumferential direction, and the convex curved surface on one side of the curved surface forms the vane pressure surface, and the concave curved surface on the other side forms the vane suction. surface; the curved surfaces of the two side surfaces are shrinking, so that the area of ​​the cross-section of each of the pre-rotating vane-type receiving holes gradually decreases. The airflow loss of the present invention is small, so that the airflow can directly enter the receiving hole after being deflected and accelerated by the pre-rotation nozzle, eliminating the sudden expansion and contraction profile loss, improving the temperature drop effect of the equal-radius pre-rotation air supply system, and The rotation ratio of the nozzle outlet is increased, the temperature drop of the system is improved, and the life of the turbine rotor blade is increased. It is suitable for an equal-radius pre-swirl air supply system with a radius position ratio of the pre-swirl nozzle and the blade air supply hole of 1.

Description

technical field [0001] The invention relates to the application field of an aero-engine pre-swirl air supply system, in particular to an over-pre-swirl vane-type receiving hole for an equal-radius pre-swirl air supply system. Background technique [0002] As an extremely important part of the aero-engine air system, the pre-swirl air supply system is a system that meets the air supply pressure and air flow requirements for the high-speed rotating turbine rotor blades. At the same time, the pre-swirl air supply system can reduce the relative total temperature of the air supply as much as possible. A properly designed pre-swirl air supply system can reduce the relative total temperature of the cold air by about 100K, which can greatly increase the operating safety of the aero-engine and extend the The working life of the engine. [0003] The equal-radius pre-swirl air supply system refers to the pre-swirl air supply system in which the radius position ratio of the pre-swirl n...

AI Technical Summary

Problems solved by technology

The airfoil receiving hole structure of the invention makes the circumferential velocity of the airflow continuously increase along the hole, and reduces the flow loss of the airflow in the hole, but it is not suitable for the equal-radius pre-swirling air supply system in engineering applications, nor can it reduce the airflow Sudden expansion and contraction losses in the cover cavity

Publication No. CN110552788A discloses a cover plate with a radial runway oblique hole type receiving hole for a pre-swirl air supply system. The design of the receiving hole in the cover plate can reduce the opening ratio of the cover plate. Improve the structural strength of the cover plate, but cannot guide the airflow direction to deflect in the hole, and cannot reduce the flow loss of the airflow in the receiving hole and the cover plate cavity

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