INCREASE OF AN IMPELLER MACHINE EFFICICENCY BY BLADE PROFILE OPTIMIZATION

F.A. Slobodkina, V.V. Malinin, A.V. Malinin

Gas flow in turbine cascade is investigated by numerical simulation method. The problem of Inviscid ideal gas flow in turbine cascade is solved. Profile flow separation regions are determined using boundary layer theory approach and flow separation criteria. Then profile geometry is modified in order to minimize separation zone and correspondingly diminish loses and eddy formation intensity. Optimized profile performance is compared with original one via numerical solution of corresponding Navier-Stokes equations for viscous flow. Comparison of numerical results with experimental data is presented.

Kew words: cascade, inviscid and viscous gas flow, boundary layer separation, eddy generation