Numerical and experimental study of three-dimensional water turbine of radial flow type

الملخص EN

This paper presents an experimental and three-dimensional numerical study of steady, turbulent, and incompressible flow characteristics inside the passage between two blades of radial turbine runner.

A finite volume method is adapted with collocated grid arrangement to solve the time / mass averaged Navier-Stokes equations.

A non-orthogonal curvilinear coordinate system is employed.

The (k-ε) two-equation model has been utilized for the satisfaction of the closure condition of the momentum equations.

The centripetal and Coriolis terms are presented in the momentum equations to introduce the effect of runner rotation.

The method has been validated by comparing the predicated numerical results with the experimental ones for the flow within the runner for the pump-turbine rig.

The results obtained from these comparisons show good agreement.

To ensure more of the validity established, the numerical predicted results are compared with other published numerical results of flow within turbo machine rotors inside the blade-to-blade stream channels.

The comparison shows good agreement.