An ideal gas enters supersonically and flows

Chapter 11, Problem 11.41

(choose chapter or problem)

An ideal gas enters supersonically and flows isentropically through the choked converging–diverging duct described in Problem 11.40. Graph the variation of Ma, \(T/T_0\), and \(p/p_0\) from the entrance to the exit sections of the duct for helium (use \(0.051 \leq \mathrm{Ma} \leq 5.193\)). Show the possible fluid states at x = -0.6 ft, 0 ft, and +0.6 ft using temperature–entropy coordinates. Sketch on your pressure variation graph the nonisentropic paths that would occur with over- and underexpanded duct exit flows (see Video V11.7) and explain when they will occur. When will isentropic supersonic duct exit flow occur?

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