# ps4 - Massachusetts Institute of Technology DEPARTMENT OF...

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Massachusetts Institute of Technology DEPARTMENT OF MECHANICAL ENGINEERING Center for Ocean Engineering 2.611 SHIP POWER and PROPULSION Problem Set #4 Basic Thermodynamic Cycles, Due: November 2, 2006 1. First Law refresher- a) Write the generic first law thermodynamic equation for a single inlet and single exit flow. b) What does this equation not take into account? c) Discuss the adiabatic process, the polytropic process and what it means for a process to be reversible. 2. Air at 10º C and 80kPa enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.5 m 2 . The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. (Assume the diffuser is the system, flow is steady and air is an ideal gas (R=.287 (kPA*m 3 )/(kg*K), enthalpy @ 283 Kelvin ~ 283 kJ/kg ) Determine: a) The mass flow rate of the air b) The temperature of the air leaving the diffuser. 3. Consider the tank system below.

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## This note was uploaded on 02/24/2012 for the course MECHANICAL 2.611 taught by Professor Davidburke during the Fall '06 term at MIT.

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ps4 - Massachusetts Institute of Technology DEPARTMENT OF...

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