An inward-flow reaction turbine develops 750 kW at 750 rpm under a net head of 100 m. The guide…

An inward-flow reaction turbine develops 750 kW at 750 rpm under a net head of 100 m. The guide vanes are at angle of 15 with the tangent at the inlet. The breadth of the blade at inlet is 0.1 times the inlet diameter. The blade thickness blocks 5% of the inlet area. The hydraulic efficiency of the turbine is 88% and the overall efficiency is 84%. Determine the (a) wheel diameter at inlet, and (b) blade angle at inlet.

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