| 主权项 |
1. A computer-based method of simulating rotor-stator unsteady turbulent flow interaction in turbomachinery, the method including:
providing a relatively coarse CFD mesh that discretizes into cells a domain which encompasses plural neighbouring blade passages of a first circumferential row of aerofoil blades, plural neighbouring blade passages of an adjacent, second circumferential row of aerofoil blades downstream of the first row, and the inter-row space between the first and second rows; providing relatively fine CFD meshes that discretize into finer cells a selected region of the blade passages of the first row encompassed by the domain, and a selected region of the blade passages of the second row encompassed by the domain, the cells of the fine meshes being embedded within the cells of the coarse mesh; and performing CFD ensemble-averaged flow field simulation over the coarse mesh and performing CFD large eddy simulations over the fine meshes, the ensemble-averaged and large eddy simulations being coupled to each other, and the large eddy simulations of the regions of the selected blade passages being used to derive unsteady turbulence stress terms in the ensemble-averaged simulation for corresponding regions of the blade passages of the first and second rows without fine meshes. |
