Material not picked up this week may be recycled! ME 200 L37: Aircraft Propulsion Reading Assignment 9.11 Office ME Gatewood Wing Room 2172 Material not picked up this week may be recycled! ThermoMentor © Program Spring 2014 MWF AM J. P. Gore Gatewood Wing 3166, Office Hours: MWF TAs: Robert Kapaku Dong Han

2 Outline Brayton Cycle –Aircraft propulsion (9.11) –Quiz 6

3 Inlet State Component aDiffuser 1Compressor 2Combustor 3Turbine 4Nozzle Aircraft Propulsion (9.11) : Quiz 6.

4 Outline Inlet State Comp. h, Btu/lbm V, ft/s p, lbf/in 2 T, o RPr aDiffuser Compressor119.48Small Combustor216.26Small Turbine546.54Small Nozzle449.71Small “Surroundings”

5 Solution p 2 =p 1 +(V 1 *V 1 )/(2*32.2*778)=21.7 lbf/in 2 ; p r2 /p r1 =(21.7/11.8)0.576=1.059 ; p 3 =(p r3 /p r2 )p 2 =(8.411/1.059)21.7=173.6=p 4. p r3 /p r4 =p 3 /p 4 ; p 4 =p 3 (p r4 /p r3 )=173.6(114/233.5) = 84.6; p 4 /p 5 =p r4 /p r5 ; p r5 =p r4 (p 5 /p 4 )=114(11.8/p 4 ); h _4 -h _5 = = ; V 5 =SQRT (2(190.55)32.2(778)) = (ft/s) (0.6819) (mi/h/ft/s) V 5 = 2107 mi/h

6 p-v:Aircraft Gas Turbine