Lecture_12 - processes Incorporate the losses in Eqn....

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AOE/ME 4234 1 AOE/ME 4234 Lecture 12 9-17-07
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AOE/ME 4234 2 Leduc 0.10 Completed 1947 Reached M 0.85
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AOE/ME 4234 3 XH-20 1947 timeframe Two ramjets mounted on rotor tips
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AOE/ME 4234 4 Bomarc M 2.5-2.8 @ 60000ft 2nd gen M 2.5 – 4 @ 100,000ft
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AOE/ME 4234 5 Project Pluto Nuclear ramjet 1957 – 1964 producing 513 megawatts and the equivalent of over 35,000 pounds force (156 kN) thrust
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AOE/ME 4234 6 SR-71 1964-1998 M 3.2+
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AOE/ME 4234 7
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AOE/ME 4234 8 Overview Ramjet performance analysis
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AOE/ME 4234 9 Ramjet Performance Analysis Want-
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AOE/ME 4234 10 Ramjet Performance Analysis Also, and can be found- Problem is to find Also Ramjet 1 2 3 4 6 e a a Ideal- no fluid losses, but include f
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AOE/ME 4234 11 Ramjet Performance Analysis T s p 0a p a a 2 4 6 T-s diagram
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AOE/ME 4234 12 Ramjet Performance Analysis Since Note that 1
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AOE/ME 4234 13 Ramjet Performance Analysis So and Returning to Finally For the burner If (5.27) 2 4 1 st Law
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AOE/ME 4234 14 Ramjet Performance Analysis We have
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AOE/ME 4234 15 Ramjet Performance Analysis We can add losses to the ramjet
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Unformatted text preview: processes Incorporate the losses in Eqn. (5.27) with difficulty p 04 T s p a 2 04 6 p 0a p 6 p 02 Constant Property Line p=constant, s=constant Process (Compression, Heat Addition or Expansion ) a AOE/ME 4234 16 Ramjet Performance Analysis where Ramjet with losses (5.34) Another way to do it- start from the nozzle and move forward AOE/ME 4234 17 Ramjet Performance Analysis 4 6 e 1 st Law Note c p should be appropriately chosen Note AOE/ME 4234 18 Ramjet Performance Analysis If the nozzle process is reversible or If , AOE/ME 4234 19 Ramjet Performance Analysis T s 4 04 6 a definition -(A) Note definition fits the previous equations AOE/ME 4234 20 Ramjet Performance Analysis Find nozzle pressure ratio- best expansion ok, with For and AOE/ME 4234 21 Ramjet Performance Analysis Must be found with equation (A) This complicates the setting of M 6 for the nozzle...
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This note was uploaded on 01/23/2012 for the course AOE 4234 taught by Professor Shinpaugh during the Fall '08 term at Virginia Tech.

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Lecture_12 - processes Incorporate the losses in Eqn....

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