Calculation of unsteady rotor-stator interaction in turbine stage harmonic balance

Mathematical Methods. Modeling. Experimental studies

This paper represents 3D flow in turbine cascade in which the harmonic balance method is applied for modeling stator – rotor interaction and pressure fluctuations near trailing edges. The harmonic balance method which is included in Star CCM+ code can simulate the whole unsteady flow at considerably reduced CPU costs. Computational results are compared with experimental results which show importance of unsteady effects.