Answer to Question #136037 in Mechanical Engineering for Vetri Vel

Question #136037
velocity compounded impulse wheel has two rows of moving blades with a mean diameter of 711.2 mm. The speed of rotation is 3000rpm, the nozzle angle is and the estimated steam velocity at the nozzle outlet is 554.73m/s. The mass flow rate of the steam passing through the blades is 5.07 kg/s.

Assuming that the energy loss in each row of blades (moving and fixed) is 24% of the kinetic energy of the steam entering the blades and referred to as the relative velocity, and that the outlet angles of the blades are:

(1) first row of moving blades ,

(2) intermediate guide blade ,

(3) second row of moving blades is , draw the diagram of relative velocities and derive the following.

• Blade inlet angles

• Power developed in each row of blades

• Efficiency of the wheel as a whole
Expert's answer
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