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Optimization design method for high-low pressure compressor transition flow passage

A technology of transition flow channel and optimized design, applied in calculation, special data processing applications, instruments, etc., can solve the problem of large flow loss in the transition flow channel of the compressor

Inactive Publication Date: 2015-08-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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Problems solved by technology

[0005] In order to overcome the shortcomings of the large flow loss of the compressor transition channel designed by the existing compressor transition channel design method, the present invention provides an optimal design method for the high and low pressure compressor transition channel

Method used

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  • Optimization design method for high-low pressure compressor transition flow passage
  • Optimization design method for high-low pressure compressor transition flow passage
  • Optimization design method for high-low pressure compressor transition flow passage

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Embodiment Construction

[0033] refer to Figure 1-2 . The specific steps of the method for optimizing the design of the high and low pressure compressor transition channel of the present invention are as follows:

[0034] According to the given initial constraint conditions of one-dimensional design, the casing and hub profile of the compressor transition channel are respectively constructed by two 4th-order Bezier curves with 5 control points, and the parametric equation of each curve for

[0035] x ( t ) = Σ i = 0 4 C 4 i t i ...

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Abstract

The present invention discloses an optimization design method for a high-low pressure compressor transition flow passage, which is used to solve the technical problem of great flow loss in a compressor transition flow passage designed with the current compressor flow passage design method. A technical solution according to the present invention comprises: determining a geometric shape of a compressor transition flow passage by using a current design method, and then constructing an end wall profile equation, which satisfies an initial design result, by using the Bessel curve, and further superimposing a well-constructed support plate based on the constructed equation. Then geometric parameters of a cartridge receiver and a hub are randomly generated, and a new profile is generated. Then flow field performance parameters are solved by using a through-flow. Finally, the total pressure loss coefficient at the exit of a support plate is taken as an optimized target function, and the static pressure recovery coefficient gradient along the hub is smaller than the pressure recovery coefficient gradient before optimization, which is taken as a constraint condition; the niche genetic algorithm optimization is conducted until an evolution to a given algebra. Since the Bessel curve is used to construct the profile equation of the compressor transition flow passage, the flow loss of the designed compressor transition flow passage is reduced.

Description

technical field [0001] The invention relates to a method for designing a transitional channel of a compressor, in particular to an optimal design method for a transitional channel of a high-low pressure compressor. Background technique [0002] The compressor transition channel is an important part of the aero-engine compression system. The air compressed by the low-pressure compressor enters the high-pressure compressor through the compressor transition channel, and then is further compressed. Therefore, the quality of its design directly affects the performance of its downstream high-pressure compressor, and also affects the performance of its upstream low-pressure compressor. With the development of aero-engine design technology, the thrust-to-weight ratio and efficiency have been improved, the boosting capacity of aero-engine compressors has been continuously improved, and the axial offset between the low-pressure compressor and the high-pressure compressor has become la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 吴虎侯朝山杨金广刘昭威
Owner NORTHWESTERN POLYTECHNICAL UNIV
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