ABSTRACT
This paper presents a newly developed numerical procedure to predict three-dimensional sand-erosion phenomena. It is well known that sand erosion is a typical multi-physics problem, i.e. turbulent flow field, particle motions and wall deformations, among others, interact. In the present code, in order to simulate this phenomenon, turbulent flow field, particle trajectories and amount of erosion on an eroded wall are calculated repeatedly. The gas-particle two-phase turbulent flow around a turbine blade is computed to clarify sand-erosion phenomena on the turbine blade. The numerical results indicate that sand erosion occurs severely around the leading edge and on the pressure surface, the rebounding particles cause the mechanical damage on the suction surface, and the aerodynamic performance deteriorates with proceeding sand erosion.