Stagnation Pressure - Compressible Flow

Compressible Flow

Stagnation pressure is the static pressure a fluid retains when brought to rest isentropically from Mach number M.

or, assuming an isentropic process, the stagnation pressure can be calculated from the ratio of stagnation temperature to static temperature:

where:

is the stagnation pressure

is the static pressure

is the stagnation temperature

is the static temperature

ratio of specific heats

The above derivation holds only for the case when the fluid is assumed to be calorically perfect. For such fluids, specific heats and are assumed to be constant and invariant with temperature (a thermally perfect fluid).