Given the conditions on a converging-diverging wind tunnel. At the reservoir pressure is measured to be 200,000 Pa and density is 1.4 kg/m^3. At the throat section Mach number is 1.0 and speed of sound is 390 m/s. At the exit/exhaust the Mach number is 2.5.

Consider steady, isentropic flow of air through a duct with varying area. At section 1, p1 = 60.0 kPa (abs), T1 = 27°C, Vị = 486 m/s. At a downstream section 2, p2 = 78.8 kPa (abs). Determine: a. Mach number, Maz b. sketch geometry of the duct

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A large reservoir at 20 °C and 800 kPa is used to fill a smallinsulated tank through a converging–diverging nozzle with1-cm2 throat area and 1.66-cm2 exit area. The small tankhas a volume of 1 m3 and is initially at 20 °C and 100 kPa. Estimate the elapsed time when (a) shock waves begin toappear inside the nozzle and (b) the mass flow begins todrop below its maximum value.