Axial flow compressor blowing-type circumferential groove casing treatment method

An axial flow compressor and casing processing technology, which is applied in the directions of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve problems such as poor compressor stability margin, increase flow capacity, improve blockage conditions, and improve efficiency. Effect

Inactive Publication Date: 2015-12-23
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the poor stability margin of the compressor in the existing axial flow compressor casing treatment method, the present invention provides a treatment method for the axial flow compressor air blowing type circumferential groove casing

Method used

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  • Axial flow compressor blowing-type circumferential groove casing treatment method
  • Axial flow compressor blowing-type circumferential groove casing treatment method
  • Axial flow compressor blowing-type circumferential groove casing treatment method

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Experimental program
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Embodiment Construction

[0015] refer to figure 1 . The specific steps of the treatment method for the blowing type circumferential groove casing of the axial flow compressor of the present invention are as follows:

[0016] 1. The present invention is applied to the isolated rotor of the axial flow compressor laboratory, and its main design parameters are shown in Table 1.

[0017] Table 1 Main design parameters of isolated rotor

[0018] number of blades

30

Design speed (rpm)

15200

Design isentropic adiabatic efficiency

0.905

Design flow(kg / s)

5.6

Design total pressure ratio

1.245

blade aspect ratio

1.94

Wheel ratio

0.61

Top Radial Clearance(mm)

0.35

tip consistency

0.96

[0019] 2. The test piece used in the present invention is based on a circumferential groove processing casing, and the treatment width of the test piece covers the entire axial width of the rotor blade tip. See Table 2 for...

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Abstract

The invention discloses an axial flow compressor blowing-type circumferential groove casing treatment method to solve the technical problem that the stability margin of a compressor treated by the conventional axial flow compressor casing treatment method is poor. The method is characterized in that based on a circumferential groove type treatment casing, tangentially blown air is added to circumferential grooves of the treatment casing, and through experimental measures, the best blowing groove design scheme which obviously improves the stability margin and the efficiency of the compressor is sought. An experimental result shows that with the adoption of the axial flow compressor blowing-type circumferential groove casing treatment method, the flow capacity of an blade top area of an axial flow compressor is improved, the separation of a boundary layer is retarded, the loss of the boundary layer is reduced, a blocking situation of a blade top end wall area is improved, the stable working range of the axial flow compressor is enlarged effectively, and the efficiency of the axial flow compressor is improved to some extent.

Description

technical field [0001] The invention relates to a treatment method for an axial-flow compressor casing, in particular to a treatment method for an axial-flow compressor air blowing type circumferential groove casing. Background technique [0002] Circumferential slotting has been confirmed by a large number of experimental research institutions at home and abroad as an effective type of casing expansion treatment. The advantage of this type of treatment is that it can obtain a certain stability margin improvement without substantially reducing the original efficiency of the compressor. As a main casing processing research type, it is applied in the front and back stages of single and multi-stage axial flow compressors. This type of treatment has also been adopted in the domestic active models to make up for the insufficient margin of the compressor, and certain benefits have been obtained. But its disadvantage is that the margin improvement is small, or the efficiency cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/54
Inventor 吴艳辉安光耀张皓光陈智洋丁永鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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