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A treatment method and device for a compressor chord groove deflector casing

A casing processing and compressor technology, applied in the casing processing method and device, and in the field of casing processing flow control with chord groove guide vanes, can solve problems such as restricting compressor stall margin, and achieve flow blockage reduction , Increased energy, improved stall margin

Active Publication Date: 2018-08-10
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flow blockage in the blade tip area of ​​the compressor is an important cause of the rotating stall, which restricts the stall margin of the compressor

Method used

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  • A treatment method and device for a compressor chord groove deflector casing
  • A treatment method and device for a compressor chord groove deflector casing
  • A treatment method and device for a compressor chord groove deflector casing

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be noted that the following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

[0030] It should be noted that implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "backward", "left", "right", "top", "bottom", etc., are only for reference The orientation of the graph. Accordingly, the directional terms are used to illustrate and not to limit the invention.

[0031] The purpose, technical solutions and advantages of the present invention will be described in detail below with...

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Abstract

The invention discloses a gas compressor chordwise groove flow guiding sheet type casing treatment method and device. A plurality of blade top chordwise grooves are formed in the wall face of a gas compressor casing in the circumferential direction, and the groove depth direction is consistent with the radial direction of a gas compressor. Then, a plurality of flow guiding blades are arranged in the grooves in the blade top chordwise direction. A blade channel composed of every two adjacent flow guiding blades is a shrinkage channel. When the blades are located below the grooves every time, the low-energy leakage flow near the blade top pressure faces can be sucked into the grooves under the action of the pressure difference between the blade top pressure faces and suction faces, after airflow is accelerated in the shrinkage runners through the flow guiding blades in the grooves, the airflow enters the blade channels again in the direction close to mainstream from the position near the suction faces, and the leakage flow and blade surface boundary layers can be simulated as well. According to the chordwise groove flow guiding sheet type casing treatment method, flowing blockage in the blade top areas can be effectively relieved, and accordingly the function of enlarging the stable work range of the gas compressor is achieved.

Description

technical field [0001] The invention relates to a casing treatment method and device, in particular to a chordal groove deflector type casing treatment flow control method and device for improving the stable working range of an axial flow compressor, and belongs to the field of impeller machinery. Background technique [0002] Axial flow compressor is one of the core components of aero-engine. With the development of aero-engine towards high thrust-to-weight ratio, low fuel consumption and high stability, it is important to increase the load and efficiency of the compressor while enabling it to have a wide and stable working range. A goal that researchers continue to pursue. When the rotational speed of the compressor is constant and the flow through the compressor is reduced to a certain extent, unstable flow phenomena such as rotating stall will occur in the compressor, and in severe cases, the compressor blades will break and the engine will stall. The safety degree of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/52F04D29/54
CPCF04D29/522F04D29/542F04D29/544
Inventor 周小勇赵庆军张彬彬赵巍
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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