Optimized design method for modelling of end wall of high load fan/compressor

Abstract

The invention relates to an optimized design method for modelling of an end wall of a high load fan/compressor. The method comprises eleven steps. As the stage pneumatic load is improved, internal flow of the fan/compressor is more severe, massive secondary flow is easily generated in an area close to the end wall, and a risk of flow stall exists. The modelling of the end wall has important influence on control over the secondary flow in an end area of the high load compressor, and becomes an important research direction. Firstly, an end wall modelling parameter defining method is researched; secondarily, based on an adaptive genetic algorithm and an artificial neural network response surface model, which are developed by the research group, an orthogonal experimental design, end wall parameter definition and a flow field value simulating technology are combined to realize automatic global optimization of the end wall of the compressor; thirdly, the effectiveness of the optimizing method is verified through different test functions; finally, a blade grid of the compressor is subjected to nonaxisymmetrical optimization based on the method. A result shows that the blade grid after modelling has good pneumatic performance.

Description

Technical field [0001] The invention relates to a high-load fan / compressor end wall modeling optimization design method, which relates to aerodynamics and optimization design of an aviation gas turbine engine compressor end wall, and belongs to the field of optimization design of an aviation gas turbine engine compressor end wall. Background technique [0002] Since the birth of modern gas turbine engines in the 1930s, the performance of aero engines has been greatly improved. After going through the four stages of development, the thrust-to-weight ratio of the main engines in active service in various developed countries has increased from the initial 2 to the current 7-9 (F110, F100, AL31Ф, etc.), with a few reaching 9-11 (such as F119, M88- Ⅲ, AL41Ф). At the same time, fuel consumption and noise have been reduced, and reliability has been greatly improved. Nowadays, as a knowledge-intensive, dual-use high-tech product, the development level of aero-engines represents to a la...

AI Technical Summary

Problems solved by technology

The present invention proposes a new method for end wall optimization. This method not only has a good global optimization ability, but also overcomes the time-consuming problem of numerical simulation of the compressor flow field to a certain extent, and is conducive to speeding up the optimization speed.

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