2008 Compressible Flow Final Exam  
December 16th 2008 15:00 — 18:00 ANSWER ALL 6 PROBLEMS; ALL PROBLEMS HAVE EQUAL VALUE; NO NOTES OR BOOKS; TAKE $\gamma=1.4$ IN ALL CASES; USE GAS TABLES THAT WERE DISTRIBUTED. 









What will be the damage to your window and office building caused by the explosion? Note that the spherical blast (shock wave) strength will decay roughly as the inverse cube of the distance, i.e. $$ \frac{\Delta P}{P_x} \propto \frac{1}{R^3} $$ and that the window and building will “feel” the reflected shock pressure.
$\Delta P / P_x \approx 0.01$ causes minor structural damage $\Delta P / P_x \approx 0.1$ causes major structural damage $\Delta P / P_x \approx 1$ is total destruction (rubble) 




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