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).
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