Reduction of gas flow nonuniformity in gas turbine engines by means of gas-dynamic methods

10th International Conference on Compressors and their Systems

Matveev, V.^1 ; Baturin, O.^1 ; 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/232/1/012073/pdf
DOI  :  10.1088/1757-899X/232/1/012073

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 as a consequence to the blade damage. The goal of the research was to find an acceptable method of reducing the level of gas flow nonuniformity as the source of dynamic stresses in the rotor blades. 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. On the basis of existing conditions (under development or existing engine) it allows the selection of the most suitable method for reducing gas flow nonuniformity.