Gas-Dynamic Methods to Reduce Gas Flow Nonuniformity from the Annular Frames of Gas Turbine Engines

2017 International Conference on Aerospace Technology, Communications and Energy Systems

航空航天工程;无线电电子学;能源学

Kolmakova, D.^1 ; Popov, G.^1

Samara National Research University, Samara, Russia^1

关键词: Dynamic stress;    Flow channels;    Gas-dynamic method;    Nonuniformity;    Reducing gas;    Rotor blades;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/302/1/012025/pdf
DOI  :  10.1088/1757-899X/302/1/012025

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Gas flow nonuniformity is one of the main sources of rotor blade vibrations in the gas turbine engines. Usually, the flow circumferential nonuniformity occurs near the annular frames, located in the flow channel of the engine. This leads to the increased dynamic stresses in blades and consequently to the blade damage. The goal of the research was to find an acceptable method of reducing the level of gas flow nonuniformity. Two different methods were investigated during this research. Thus, this study gives the ideas about methods of improving the flow structure in gas turbine engine. Based on existing conditions (under development or existing engine) it allows the selection of the most suitable method for reducing gas flow nonuniformity.