Question

b)An inward flow reaction turbine works under a head of 100m. The inlet and outlet diameters of the runner are 1.2 m and 0.6 m, respectively. The width of the runner is 150 mm, which is constant throughout. The velocity of flow at the outlet is 6 m/s. The blade angle at the outlet is 15. The hydraulic efficiency is 0.9. Calculate the following: ) The speed of the Turbine ii) The inlet blade angle and iii) The power produced. (10) 6. a) Draw the inlet and outlet velocity diagram of a Francis turbine. Which one of a turbine or a centrifugal pump has better efficiency and why? b) A Francis turbine has a diameter of 1.4 m and rotates at 430 r.p.m. Water cnters the runner without shock with a flow velocity of 9.5 m/s and leaves the runner without whirl with an absolute velocity of 7 m/s. The difference between the sum of the static and potential heads at entrance to the runner and at the exit from the runner is 62m. The turbine develops 12.25 MW. The flow rate through the turbine is 12 m'ts for a net head of 115 m. Find the following: 1) The absolute velocity of water at entry to the runner and the angle of the inlet guide vanes li) The entry angle of the runner blades

please solve 5(b) and 6 (a and b) fluid machinery

Answer 1

us O5) b) Ni Civen date Su velocity flow. x) van angle nd aNane Name angle at outlet 9 = IS。 Cal culahon 882.3]-(D

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