AREA MACH NUMBER RELATION
[ Gas dynamics – Yahya]
A∗ is the area of the throat ( m2 )
A is the area of the nozzle exit ( m2 )
M is the Mach number (No unit)
γ is the specific heat ratio (No unit)
The area-Mach number relation gives the ratio of the local area to throat area as a function of Mach number. The area-Mach number relation is valid for isentropic flows (i.e. no shocks allowed) and calorically perfect gases.