Numerical Analysis of Multi Jet Pelton Turbine Model | Original Article

ABSTRACT:

Every turbine is designed for specific site condition (head, discharge and speed). For high heads and low discharge values, Pelton turbines are mostly used. Variation in head and discharge causes variation in performance of turbines. Earlier only experimental techniques were used to optimize the design of turbo-machine and check their performance at designed and off design conditions. With the advances in numerical techniques and computational power, Computational Fluid Dynamics (CFD) has proved to be boon in designing and predicting the performance of turbo-machine at all possible operating regimes. With the help of CFD, not only global parameters can be found out but local parameters which are not possible experimentally can be found out. In present work, flow analysis of a six jet Pelton turbine model has been done using multi phase flow. Numerical results are compared with available model test results at the best efficiency point. The effect of mesh size, turbulence model and time step is also studied.