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A bleed air arrangement for reducing the dissipation vortex in front of the grate plate

A grate tooth and dissipation technology, which is applied in the field of aero-engines, can solve the problems of low cost and achieve the effects of reducing wind resistance temperature rise, improving cooling effect, and improving cooling quality

Active Publication Date: 2022-06-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no low-cost design that can effectively suppress the formation of dissipative vortices in front of the high-radius grate plate.

Method used

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  • A bleed air arrangement for reducing the dissipation vortex in front of the grate plate
  • A bleed air arrangement for reducing the dissipation vortex in front of the grate plate
  • A bleed air arrangement for reducing the dissipation vortex in front of the grate plate

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only for illustration and are not intended to limit the present invention.

[0021] The invention provides a kind of bleed air layout that weakens the dissipation vortex in front of the grate tooth plate, such as image 3 As shown, on the surface of the stator drum 2 opposite to the grate plate 1, the distance from the first tooth in the grate plate 1 located upstream of the air flow (such as image 3 As shown in A) within the range of 8 mm to 10 mm, a ring of bosses are provided along the circumference of the stator drum surface 2, and a plurality of pre-rotating nozzles are arranged on the bosses as the air inlet 3; since the stator is a thin-walled For thin-walled parts, it is impossible to directly excavate an orifice struc...

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Abstract

The invention discloses a bleed air layout for weakening the dissipation vortex in front of the grate tooth plate. On the upstream position of the grate tooth plate on the surface of the stator drum, a plurality of pre-rotating nozzles are arranged along the circumference as the bleed air inlets. In this way, the bleed air After the airflow introduced by the inlet is mixed with the airflow of the radial inward flow, it can not only improve the cooling quality, but then continue to flow downstream, improving the cooling effect on the grate plate and downstream components, and can also reduce the heat dissipation in front of the grate plate. The impact of the vortex structure weakens or even destroys the dissipative vortex, so as to realize the active control of the flow structure in the cone wall cavity of the rear shaft diameter of the compressor, making it difficult to form a dissipative vortex structure in front of the grate plate, thereby reducing the wind resistance in front of the grate plate Temperature rise, improving cooling quality.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to an air-bleed layout for weakening the dissipation vortex in front of the grate toothed disc. Background technique [0002] With the continuous improvement of aero-engine performance, the temperature before the turbine is getting higher and higher, which puts forward higher requirements for material technology and aero-engine air system cooling technology. At present, the application of aero-engine material technology has reached the extreme state. High-temperature material technology alone cannot meet all design requirements, and the remaining cooling requirements must be realized by the aero-engine air system. Normally, increasing the bleed air flow rate of the air system will directly improve the cooling effect of the air system, but the increase in the flow rate of the air system will lead to the attenuation of the overall performance of the engine. The entropy productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/18
CPCF02C7/18
Inventor 邱天丁水汀邓长春王承昊赵煜袁奇雨刘传凯刘晓静
Owner BEIHANG UNIV
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