High fidelity numerical simulations on the unsteady flow field of low-pressure turbine cascades with and without upstream disturbance at moderate Reynolds number

Abstract This paper numerically investigates the aerodynamic performance of T106A low-pressure turbine based with different inflow conditions at moderate Reynolds number by using high computing on order unstructured methods. Two respectively uniform and disturbed are considered, while for latter a small circular cylinder is placed upstream cascade to generate wake turbulence as long-standing disturbance. A Fourier-spectral/ hp element method employed solve flow dynamics in complex geometries. Flow transition characteristics quantified terms distribution wall surface pressure friction coefficient, profile loss evolution boundary layer structures well. The numerical results show that current simulations accurately predict cascades capture effects wake-generated disturbance cascade, which shown effectively modify compared case.