A computational evaluation of impeller blade moment during the impeller-diffuser interaction is performed. The moment calculated is based on the axial moment generated by fluid forces acting on a control volume surrounding an impeller blade passage. Included in the computations are unsteady flow field contributions to the unsteady impeller moment. Results are compared to numerical predictions of the impeller blade moment based on pressure and shear stress terms integrated over the blade surface. A comparison is also made to the Euler turbomachinery equation often used for calculating blade moment and energy transfer in simplified design procedures.
Volume Subject Area:
Advances in Numerical Modeling of Aerodynamics and Hydrodynamics in Turbomachinery
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