The Mach number of an airflow is \(M_{1}=1.4\), air pressure \(p=1.012 \times 10^{5} \mathrm{~Pa}\), and air temperature is \(273 \mathrm{~K}\). This airflow, then, passes through an oblique shockwave on a deflected surface, and the Mach number of the airflow decreases to \(M_{2}=1\).

(a) Find the deflection angle. Is the oblique shockwave attached to, or detached from the deflected surface?

(b) Find the shock angle;

(c) Calculate the air pressure, temperature, density, and air speed after the shockwave.

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M M FIGURE 10.9 Supersonic airflow over a twice-deflected surface. IL M3