HW21s - Spring 2006 Thermodynamics Homework#21 Solution 1...

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1 ME 201 Thermodynamics Homework #21 Solution 1. Consider a jet aircraft flying at 300 m/s at an altitude of 3,000 m (use Table A-16 in the text to determine the pressure and temperature). The jet operates with a simple, ideal turbojet engine. The burner of the engine operates at 1300 kPa and 1800 K. Determine a. specific thrust produced b. propulsive efficiency Solution: We begin with a block diagram of the system. Now we set up our table. Node T(K) P(kPa) h(kJ/kg) φ (kJ/kg K) v (m/s) 1 268.5 70.12 268.62 1.5907 300 2 313.4 120.4 313.4 1.7458 0 3 611.3 1300 618.93 2.4287 0 4 1800 1300 2003.3 3.6684 0 5 1548.6 683.4 1697.77 3.4838 0 6 885.1 70.12 916.23 2.829812 1250 Italicized values form air tables Bold values are calculated We begin by entering our operating information. Since state 1 and state 4 are fixed from the operating information we can go to the air tables and find h 1 = 268.62 kJ/kg and φ 1 = 1.5907 kJ/(kg K) h 4 = 2003.3 kJ/kg and φ 4 =3.6684 kJ/(kg K) We now traverse the cycle. Diffuser
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This note was uploaded on 07/25/2008 for the course ME 201 taught by Professor Somerton during the Spring '06 term at Michigan State University.

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HW21s - Spring 2006 Thermodynamics Homework#21 Solution 1...

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