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4.45 A Laval nozzle of area ratio 1.4 operating in an underexpanded condition exhibits a wave pattern as shown in Figure 4.603. Do problem 4.45 from the textbook. Note that the 5º label on the figure is bogus. I have no idea what it means. The answer

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9+ is given that area ratio = 1.4 Stagnation fressure (P) = 490kpa Back Pressure (P) = 25kpa P=1.4 mach no. (M) = ? ф - ? weNow, mach number (M) = 2.588 tne. = 2.59 ore for do weknow P = tant (M) (2.59) 68.880 ans. = tant

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