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Unformatted text preview: Problem #3: Repeat problem #1, but this time using assuming the compressor and turbine have isentropic efficiency of 90%. Problem#4: Repeat problem #2 using the irreversible Brayton cycle model from problem #3. Problem #5: Beginning with the irreversible Brayton cycle model from problem #3, add a regenerative heat exchanger to heat the air at the compressor exit by using the exhaust from the turbine. Be sure to redraw the engine schematic and Ts diagram, adding new state labels as necessary. For this problem determine: a) The temperature of the turbine exhaust (F), b) the rate of specific heat input to the air (BTU/lb m ), c) the backwork ratio, d) the thermal efficiency. [Note that Q in includes ONLY to the heat added during the combustion process]. Problem #6: Repeat the calculations for problem #2 using the regenerative Brayton cycle studied in problem #5....
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 Fall '07
 Schmidt

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