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Unformatted text preview: a Rayleigh flow problem because the flow is not 1D. (i) Determine the rate of heat addition (in Watts). (ii) What is the rate of entropy production (in J/K/s) as the flow goes from state 1 to 2. 1 2 u 2 =200 m/s P 2 =1 atm =1 kg/s u 1 = 10 m/s P 1 =2 atm T 1 =300 K Problem 4. (20 pts) We want to model a scramjet engine as a 1D flow with heat addition. The incoming flow is supersonic and the heat added by combustion is treated as heat addition by conduction as shown. (i) How much heat per unit mass must be added to thermally choke the flow (i.e., drive the exit of the combustor, state 2, sonic)? Ignore the effect of the Pitot probe. (ii) The Pitotstatic probe reads the pressures: P pit =3.1 atm, P static =0.5 atm. How much heat was added between station 1 and the location of the Pitotstatic probe? M 1 =3 T 1 =1000 K q 1 * 2...
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 Spring '07
 DOLLING,D

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