The blade tip angles of a reaction turbine are 32° and 25 for fixed and moving blades respectively. The mean ring diameter of a pai of blades is 1.5 m and the blade height is 0.15 m The steam which passes through the pair at rate of 20 kg/s is dry saturated at 24 bar. Find, (a) Axial velocity (b) Blade speed (c) Power developed at that speed.

There are two turbine stages with a reheater in between, as shown below and the following conditions are provided. Assume the mass flow rate of air = 1 Kg/s. Turbine stage 1 Stream 1 2 3 4 Reheat combustor P (kPa) T (K) 1200 350 350 100 1200 1200 3 Turbine stage 2 h (kJ/kg) W cycle • Determine the total work developed, which is the sum of the work developed by the first stage and the work developed in the second stage. • Determine the heat added in the reheater. • If the reheat is turned off, streams 2 and 3 no longer exist and we go directly from 1 to a new state at stream 4. What is h4 and what is the work generated in the turbine in this case?

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