MAE112HW5 - Due MAE 112 Homework Assignment#5 1 Do...

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Due: February 20, 2009 MAE 112 Homework Assignment #5 1. Do problem #8 on page 211 of Hill and Peterson text. 2. Do problem #9 on pages 211-12 of Hill and Peterson text. 3. Consider a turbine stage that has a polytropic efficiency of 0.97 for the stator (nozzle) and for the rotor flow. None of the total static enthalpy drop through the stage occurs in the rotor portion. The initial and final velocities for the stage are axial and have no swirl (tangential component). Assume that only the tangential component of velocity changes through the stator (nozzle) portion. The flow has = 1.3 and c p = 0.30 Btu/1bm R; the incoming flow has a static temperature of 2000 R, a static pressure of 20 atmospheres, and a velocity of 200 ft/sec. The flow exiting the stage has a temperature of 1500 R. What is the final pressure? What is the power extracted per unit mass flow? What is the average rotational velocity of the rotor blade? 4. Consider a turbine stage that has a polytropic efficiency of 0.97 for the stator (nozzle) and for the rotor flow.
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