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Axial seam processing casing

A technology for dealing with the casing and the axial direction, applied in the field of compressors, can solve the problems of reduced compressor stability margin, complicated internal flow of the compressor, intensified tip leakage flow, etc., so as to improve the flow condition of the tip and improve the stability. Sexual margin, the effect of delaying the stall

Active Publication Date: 2021-10-01
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, high-performance engines require the compressor to have a high pressure ratio and high load, which makes the internal flow of the compressor more complicated, the secondary flow intensifies, the boundary layer thickens, the blade tip leakage flow intensifies, and the separation area becomes larger. Reduced machine stability margin

Method used

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  • Axial seam processing casing
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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0027] see figure 2 , is a schematic structural view of an axial slot processing casing provided by an embodiment of the present invention. Such as Figure 2 to Figure 4 As shown, the axial slot type processing casing (hereinafter referred to as processing casing 2) is applied to a compressor, and the moving blades 3 of the compressor rotor are arranged in the processing casing 2, and the moving blades 3 of the The edge faces the inner wall of the processing casing 2;

[0028] On the inner wall of the processing casing 2 corresponding to the upstream to downstream area of ​​the edge of the moving blade 3, there are a plurality of slot structures 1 extending along the axial direction of the processing casing 2, and a pl...

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Abstract

The invention provides an axial slit processing casing, which belongs to the technical field of air compressors. The processing casing includes: the moving blades of the compressor rotor are arranged in the processing casing, and the edges of the moving blades face the inner wall of the processing casing; a plurality of edges are provided on the inner wall of the processing casing from the upstream to the downstream corresponding to the edge of the moving blades. The axially extending slit structure of the processing casing, and a plurality of slit structures are uniformly and misplaced distributed along the circumferential direction of the processing casing. The treatment casing provided by the present invention can use the pressure difference between upstream and downstream in the passage to suck the low-energy fluid blocked on the top of the moving blade into the suction slot through the axially misaligned slot structure, and at the same time, it can maximize the flow close to the downstream of the passage. The low-energy fluid is sucked into the slot, and this part of the fluid is ejected upstream of the moving blade, improving the flow condition entering the top of the moving blade, delaying the occurrence of compressor stall, widening the margin of the compressor, and negatively affecting the peak efficiency of the compressor smaller.

Description

technical field [0001] The invention relates to the technical field of air compressors, in particular to an axial slot processing casing. Background technique [0002] As one of the core components of the engine, the fan / compressor affects the performance of the engine. In recent years, high-performance engines require the compressor to have a high pressure ratio and high load, which makes the internal flow of the compressor more complicated, the secondary flow intensifies, the boundary layer thickens, the blade tip leakage flow intensifies, and the separation area becomes larger. Reduced machine stability margin. The methods of improving the stability margin in compressor design are divided into two categories: active control and passive control. Compared with active control, casing processing, as one of passive control technologies, is easy to implement and low in modification cost, and has been extensively studied. figure 1 a to 1d are the two typical passive control m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/40F04D29/42F04D29/52F04D29/68F04D27/00
CPCF04D27/00F04D29/403F04D29/4206F04D29/526F04D29/681F04D29/685
Inventor 杜娟张千丰李继超张宏武
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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