Dynamic Stress on Rotor Blades from Row Interactions in an Axial Flow Compressor
XIA Sui-Qin1, LÜ Wen-Lin2, LIU Zhi-Wei2
1.Department of Electromechanical Engineering, Zhejiang University of Technology,Hangzhou 310014, China;
2.Department of Aeroengine and Thermopower Engineering,Northwestern Polytechnical University, Xi' an 710072, China
Abstract We investigated the impact of interaction of downstream rotor blade row with upstream guided vane row, i.e., interactions of wake and potential flow field, in a single stage axial flow compressor, on vibrations of rotor blades due to the unsteady flow induced by the interaction. With the help of FEM, numerical simulations have been carried out with some correlated factors, such as the geometry of vane profile, the number of guided vanes and so on, in affecting dynamic stress distributions in the rotor blades. An approximate method was given out to compute unsteady flow forces, acting on the rotor blades for compressor designers. Finally, dynamic stress distribution diagrams were illustrated for an example case. The comparison between the computed results and the measurement qualitatively came closer. Some useful conclusions have been obtained.
XIA Sui-Qin, Lü Wen-Lin, LIU Zhi-Wei. Dynamic Stress on Rotor Blades from Row Interactions in an Axial Flow Compressor. Chinese Journal of Engineering Design, 2001, 8(3): 152-156.
