FLUID MACHINERY PAPER FOR UPTU

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                                                         (Section-A)
1 A jet of water having a velocity of 20 m/s strikes a curved vane, which is moving with a velocity of 10 m/s.The jet  makes an angle of 20 with the direction of motion of vane a inlet and leaves at an angle of 130 to the direction of motion of vane an outlet. Calculate  (i) vane angles, so that the water enter and leaves the without shock.
 (ii) Work done per second per unit weight of water striking ?


2.Find an expression for the efficiency of a series of moving curved vanes when a jet of water strikes the vanes at one its tips. Prove that maximum efficiency is when u=V and the value of maximum efficiency is 50%.

 3.Find an expression for the force on the curved plate when the plate is moving in the      direction of jet also find out the  Work done by the jet on the plate per second.
                                                       (Section-B)
Attempt any two question                                                                   (10x2=20)
                                               
1.Explain the governing of turbines ? also explain the governing of pelton turbine with neat diagram ?
2. (i) Classify the different types of hydraulic turbines ?
     (ii) Define the various efficiencies of a turbine ?
3.The penstock supplies water from a reservoir to the Pelton wheel with a gross head of 500 m. One third of the gross head is lost In friction in the penstock. The rate of flow of water through the nozzle fitted at the end of penstock is 2.0 m /s .The angle of deflection Of the jet is 165 .Determine the power given by water to the runner and also hydraulic efficiency of the pelton wheel .
Take speed ratio=0.45 and C = 1.0

                                                 
                                                          (Section-C)

Attempt any two question                                                                   (10x2=20 )
1.A jet of water of diameter 7.5 cm strikes a curved plate at its centre with a velocity of 20 m/s. The curved plate is moving with a velocity of 8 m/s in the direction of the jet. The jet is deflected through an angle of 165 assuming the plate is smooth find (i) Force exerted on the plate in the direction of jet (ii) Power of the jet (iii) Efficiency of the jet
  
2. Derive an expression for the force and work done on a series of radial curved vanes with neat diagram

3.A jet of water having a velocity of 35 m/s impinges on a series of vanes moving with a      velocity of 20 m/s. The jet makes
  an angle of 30 to the direction of motion of vanes when entering and leaves at an angle of  120 Draw the velocity of triangle at inlet and outlet and find (a) the angles of vanes tips so that vanes enters and leaves without shock
 (b) the work done per unit weight of water entering the vanes
 (c) the efficiency



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