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Optimization method for slit-type casing treatment parametrization design

An optimization method and casing processing technology, which is applied in the field of aero-engines, can solve problems such as the decrease in efficiency of compressor design points, and achieve the effects of saving human resource costs, improving design efficiency, and shortening the design cycle

Inactive Publication Date: 2017-10-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0003] There are many structural forms of casing processing. Taking seam casing processing as an example, it has many geometric design parameters. When designing casing processing, the influence of each geometric parameter on flow control is mutually restricted, especially casing processing The key geometric parameters have a crucial influence on the stability expansion effect and additional loss, and it is difficult to find the optimal design that improves the stability margin and efficiency of the compressor through a large number of multi-scheme calculations
According to past experience, slotted casing treatment can effectively improve the stability margin of the compressor, but at the cost of a decrease in the efficiency of the compressor design point

Method used

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  • Optimization method for slit-type casing treatment parametrization design
  • Optimization method for slit-type casing treatment parametrization design
  • Optimization method for slit-type casing treatment parametrization design

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Experimental program
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Embodiment Construction

[0019] Such as figure 1 As shown, this embodiment adopts the axial folding line oblique seam casing of a typical axial flow compressor, and specifically includes the following steps:

[0020] Step 1. Select the geometric parameter variable to be optimized for casing processing and its corresponding spatial range to conduct experimental design and construct a surrogate model.

[0021] Such as figure 2 As shown, the geometric parameter variables are: leading edge axial position a, trailing edge axial position c, casing processing depth d, casing processing inclination angle α, casing processing knuckle position (b-a) / (c-a) and The casing handles the opening ratio W / (W+G).

[0022] The geometric parameter variables need to be given with reference to the specific structure and flow field, and the corresponding spatial range is:

[0023] 1) Axial position a of the leading edge: depends on the axial coverage of the slot and the axial position of the slot. According to engineerin...

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Abstract

The invention discloses an optimization method for slit-type casing treatment parametrization design. A geometric parameter variable which needs to be optimized by casing treatment and a corresponding change space range are selected to carry out experiment design and construct an agent model; and according to a selected optimization target, a multi-target genetic algorithm is adopted by aiming at the agent model to carry out multi-target optimization solving, whether an obtained optimization result meets requirements or not is judged through numerical simulation, and a numerical calculation result which does not meet requirements is added into a sample library to be subjected to iterative solution to finally obtain a specific geometric parameter which meets the requirements. The method is reasonable in design, the design efficiency of casing treatment is improved, a design period is shortened, cost is lowered, and the method is suitable for secondary development.

Description

technical field [0001] The invention relates to a technology in the field of aero-engines, in particular to an optimization method for parametric design of slotted casing processing. Background technique [0002] When an aero-engine is flying in a wide range of operating conditions, the compressor component, one of its core components, often suffers from insufficient stability margin. If the stability margin is too small, the compressor will easily enter an unstable working state, and then the performance of the compressor will be seriously reduced, and even the engine will be damaged. In the current situation where the load and efficiency requirements of aviation compressors are getting higher and higher, it is more and more important to seek a flow control method that improves the stability margin of the compressor and delays the airflow stall. As a commonly used passive control technology, casing processing has the advantages of simple structure, low manufacturing cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 王立卢少鹏滕金芳朱铭敏羌晓青
Owner SHANGHAI JIAO TONG UNIV
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