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Reading verification:

1.

Given that the ratio of the starting total pressure to the ambient pressure at the exit is known for a converging diverging duct, and there is a shock in the duct, how do you find the location of the shock?

Assume a shock location, compute exit pressure, iterate.

2.

What happens with the critical area of a stream when it passes through a shock?

(a)

increases

(b)

decreases

(c)

stays the same

(d)

does not change much

(e)

is the same for expansion shocks, but different for compression shocks.

3.

Where can we find the actual values for the change in critical area across a shock, if any?

From the p₀₂/p₀₁ column in A2