Shock waves are treated as discontinuities here, but theyactually have a very small fi nite thickness. After giving itsome thought, sketch your idea of the distribution of gasvelocity, pressure, temperature, and entropy through theinside of a shock wave.

For a hotshot wind tunnel with T=50o0k and P=100 MPa. Calculate and plot Mach number as a function of ratio A/At for the choked nozzle of the tunnel for 1) air in thermochemical equilibrium and 2) air with chemical composition and all internal energies except for translational.

A piston confined in a tube is suddenly accelerated to a velocity at (m/s) which causes a 구2 shock wave if the temperature of the air is 2C). Solution:

Example 3 Helium expands in a nozzle at from 1.2 MPa, 600 K and negligible velocity to 0.1 MPa. Khelium = 1.6 and Cp Calculate the throat and exit areas for a mass flow rate of 0.1 kg/s, assuming the nozzle (a) is isentropic and Why must this nozzle be converging-diverging nozzle?