Prelim_2_problem_1 - Prelim 2, Problem 1 Given: Hot...

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Prelim 2, Problem 1 Given: Hot combustion products flowing at 80 m/s enter a nozzle at 260 kPa and1050 K and leave at 10 kPa. Find: Exit velocity of the nozzle Assumptions: - model gas as air with constant specific heats - neglect change in potential energy T 1 = 1050K p 2 = 10kPa p 1 = 260kPa V 1 = 80m/s V 2 = ? m/s c p = 1.000kJ/kgK k = 1.4 R = 0.287kJ/kgK Analysis: First, apply energy conservation to control volkume, neglecting change in potential energy, () 22 12 2 1 21 2 2 21 2 1 0 2 2 2 CV CV p VV mh Q W V Vhh Vc T T V    =+−++       =+ =− + ±± ± ± 0 0 For isentropic process with constant specific heats,
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Prelim_2_problem_1 - Prelim 2, Problem 1 Given: Hot...

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