ASE 362K - Lecture Handout - Over Under Expanded Nozzles

ASE 362K - Lecture Handout - Over Under Expanded Nozzles -...

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Over- and Under-expanded Nozzles Over-expanded Perfectly-expanded Under-expanded P exit < P back P exit = P back P exit > P back Liftoff At altitude (e.g., 60,000 ft) High altitude
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Overexpanded C-D Nozzles Shuttle main engine test firing LH2/LOX Mach disk
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Under-expanded converging nozzles at various pressure ratios (Yüceil and Ötügen, 2000) reference 1 < P e /P b < 1.5 = 2.5 = 7.5 = 15.5 = 20.3 slightly underexpanded
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ASE 362K - Lecture Handout - Over Under Expanded Nozzles -...

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