Investigations on aerodynamic and mechanical performance of a transonic blade based on a fluid-structure interaction method

In order to study the influence of the fluid-structure interaction for the aerodynamic and mechanical performance of a transonic compressor blade, a time domain two-way fluid-structure interaction numerical method with ANSYS-CFX/Multiphysics was applied to examine the aerodynamic performance of the transonic blade under aerodynamic and centrifugal forces. The mechanical performance was analyzed by comparing the results between one-way and two-way fluid-structure interaction methods. The results show that the maximum displacement of the blade appears at the tip near leading edge, and that the blade deformation has significant effects on the aerodynamic performance in comparison with the cold blade, which makes passage shock wave position forward and choke mass flow rate increase. Comparing the results between one-way and two-way FSI numerical computations in mechanical performance, the amplitude of the overall blade deformation increases by 1.1% and the maximum Von-Mises stress increases by 0.8%. The overall results indicate that the industrial practice should adopt a two-way fluid-structure interaction method to guide the aerodynamic design and check the strength, and to improve the safety and reliability of the compressor.