Grade characteristic matching method for multi-stage axial flow gas compressor

Abstract

The invention belongs to the field of compressor performance simulation, and relates to a stage characteristic matching method of a multi-stage axial flow compressor, which comprises the following steps: selecting one-dimensional calculation parameters of stage characteristics; obtaining a stage characteristic one-dimensional calculation parameter value in the inlet direction and the middle diameter position of each stage of rotor blade of the multistage axial flow compressor; defining the stage characteristic one-dimensional calculation parameter value of the first stage of the multi-stage axial flow compressor as an inlet condition, and defining the stage characteristic one-dimensional calculation parameter values of other stages except the first stage as inlet boundary conditions; single-stage characteristic values of other stages except the first stage are calculated, and the single-stage characteristic value of the first stage and the joint calculation stage characteristic value of the multi-stage axial flow compressor are calculated; drawing a stage characteristic analysis curve of each stage of the multi-stage axial flow compressor by using the joint calculation stage characteristic value and the single-stage characteristic value; and inter-stage parameter matching of the multi-stage axial flow compressor is judged. According to the stage characteristic matching method designed by the invention, stage characteristic matching in the design scheme of the multi-stage axial flow compressor can be quickly analyzed, and the method plays an important role in judging the matching performance of the inter-stage parameters of the compressor.

Description

technical field [0001] The invention belongs to the field of compressor performance simulation, and relates to stage matching design and analysis technology of a multistage axial flow compressor, in particular to a stage characteristic matching method of a multistage axial flow compressor. Background technique [0002] The axial flow compressor is a part of the gas turbine engine that uses high-speed rotating blades to pressurize the air sucked in from the surrounding atmosphere and then supply it to the combustion chamber. In order to generate high-pressure air, multi-stage impellers are often installed in the axial direction of the main shaft to form a multi-stage shaft flow compressor. And with the requirements of a new generation of advanced fighter jets with high unit thrust in high power state and low fuel consumption in partial power state, relevant research institutions in advanced aviation countries have carried out the development of engines with Core Driven FanSta...

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Problems solved by technology

[0005] In order to solve the problems of complex, difficult, and low-efficiency analysis and design of inter-stage performance matching of multi-stage axial flow compressors, the present invention discloses a simple, fast, efficient and accurate stage characteristic matching method of multi-stage axial flow compressors , which uses a one-dimensional characteristic calculation program, which can quickly analyze the matching of intermediate characteristics of multi-stage axial flow compressors, and plays an important role in judging the matching of parameters between compressor stages

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