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Novel arc slot casing treatment

A technology for processing casings and arcs, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., and can solve problems such as efficiency effects

Inactive Publication Date: 2010-12-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The circular arc chute processing casing developed in recent years (such as image 3 Shown) a good balance between the fan / compressor stable working margin and efficiency, but still has some impact on efficiency

Method used

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Embodiment Construction

[0049] The specific implementation of the present invention is to carry out casing treatment on the fan / compressor blade tip casing. for Figure 4 or Figure 7 The processing box air chamber in the box can be selected to process or not to process depending on the specific situation. Below just take a transonic compressor as an example to illustrate the implementation process of the novel circular arc chute handling casing of the present invention.

[0050] For a high-performance transphonic fan with a single-stage pressure ratio of 2.2 (structure and aerodynamic parameters are shown in Table 1), the parameters of the new arc chute processing casing are determined as follows.

[0051] Table 1 Relevant structure and aerodynamic parameters of a single-stage transonic fan

[0052] parameter name

parameter value

Number of rotor blades Z

14

Design speed n

21500RPM

Blade tip tangential speed U Tip

495.32m / s

Blade tip radial...

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PUM

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Abstract

The invention relates to a fan / compressor casing treatment device. In the internal structural design of an arc slot casing treatment, the radial projecting line of a meridian plane is a non-orthogonal smooth curve, so that flow loss inside the casing treatment is reduced, and the efficiency of the fan / compressor is improved.

Description

technical field [0001] The invention relates to a fan / compressor case processing device, which greatly improves the stable working margin of the fan / compressor without losing the efficiency of the fan / compressor. Background technique [0002] In the design and development process of aeroengine compressors, the unstable flow of the compressor, such as stall and surge, greatly limits the further improvement of the performance of the compressor. In order to make the compressor have a large stable operating margin and ensure the safe operation of the engine, the designer often sacrifices the performance of the compressor and places the operating point of the compressor far away from its best efficiency point. Therefore, widening the stable working range of the compressor has become the goal pursued by aero-engine designers. [0003] In order to improve the stable operating range of the compressor, fan / compressor designers have proposed various forms of casing processing. Figur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/40
CPCF04D29/685
Inventor 陆亚钧袁巍脱伟
Owner BEIHANG UNIV
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