The design of the spear plays a key role in the Pelton wheel. In general, the spear is useful for increasing the velocity outlet of the nozzle. The maximum amount of the output velocity of the nozzle is mainly controlled by the spear. In this paper, the flow analysis in the Pelton wheel nozzle has been performed by varying the surface design of the spear with different dumps in different shapes and placed at different distances and with different sizes. The simulation in the paper is performed to obtain the optimal shaper and the optimal position for the complexity of the problem. We used the Taguchi design optimization method to obtain the optimal shaper to create the nozzle's higher velocity output. The flow simulation is performed in the ANSYS fluent software and the simulation is performed in fluent with the k-ε; the flow simulation is performed in the two-dimensional analysis. Taguchi optimization is performed in the Minitab software. The most optimal condition for the spear to obtain the maximum velocity is at the following aspect the model is inside a triangle and the overall length of the bump is 1mm and the number of bumps is 4 and the distance between the bumps is 1.75 mm
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