A turbine with an impeller diameter of 18 in. is tested under a head of 25 ft. while the flow rate is 18 cfs and the speed is 400 rpm. (a) Calculate the specific speed. (b) What type of turbine is this? (c) If a homologous unit with 38 in. runner is used under a head of 120 ft., what would the speed and discharge be? (d) If the original turbine produces 40 hp, what is its efficiency? (e) What is the power produced by the second unit? Assume the same efficiency for both units. Ans: N s=1.18, Q =175 cfs, H=1874 hp, η=0.78

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.