Design method applied to low-loss gas compressor intermediate case

Abstract

The invention relates to a design method applied to a low-loss gas compressor intermediate case, in particular to a modeling design method for the gas compressor intermediate case based on a Lee curve in a popularization form and by using a midline stacking sectional area distribution rule. By selecting proper order and continuity, the method is applied to optimization design, the second-order continuous end wall molded line capable of accurately representing the optimal intermediate case is obtained, and the constructed end wall molded line is continuous, smooth and excellent in quality; due to the fact that the Lee curve has characteristics of a specific form and substituting only known constraint directly, the invention can directly and conveniently carry out intermediate case end wall molded line design, and additional calculation iteration does not need to be carried out. The invention has the characteristics of simple design, rapid construction, high accuracy and suitability for optimization design; the invention is suitable for modeling design of the intermediate case of the gas compressor with the vertical inlet and outlet, has good expansibility in the modeling aspect of the intermediate case, and has remarkable practical value.

Description

technical field [0001] The invention relates to the field of compressors, in particular to an optimal design method applied to an intermediate casing of a low-loss compressor. Background technique [0002] The intermediary casing of the compressor is a static part connecting the high-pressure compressor and the low-pressure compressor of the twin-rotor aeroengine. It is mainly composed of two parts: the casing / hub end wall and the support plate. In the intermediary casing of the compressor with a large drop-to-length ratio in modern aero-engines, the airflow needs to be deflected within a short distance to guide the airflow of the upstream low-pressure compressor to the downstream high-pressure with low loss and a more uniform flow field in the compressor. This requires a careful optimization design of the intermediary casing of the compressor, and choosing an appropriate intermediary casing modeling method is the first step in optimizing the design. [0003] There are ma...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings that the existing compressor intermediary casing modeling technology cannot guarantee the accuracy of optimization and the design method is not easy to expand, the present invention proposes a low-loss Design Method of Intermediate Case of Compressor

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