The converging-diverging nozzle of exit-to-throat area ratio used in the text runs on…
PHYSICS · Multi-part · Fermi University Physics · Fluids & Continuum Physics · Waves, acoustics and compressible flow · Waves, acoustics and compressible flow
Signal Speeds in Fluids, Ch Steepening and the normal shock wave
Problem
The converging-diverging nozzle of exit-to-throat area ratio 2 used in the text runs on air (γ=1.4) with its back pressure raised to pb=0.80p0, where p0 is the reservoir pressure. A single normal shock stands in the diverging section, and the flow is isentropic on either side of it.
((a)) Find, by bisection on the shock position, the area ratio As/A∗ at which the shock stands and the Mach number M1 just ahead of it.
((b)) Find the stagnation-pressure ratio p02/p01 across the shock and the exit Mach number Me.
((c)) Is the mass flow rate larger, smaller or the same as at pb=0.70p0? Explain.