armcrc - Critical mach number given Cp

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3.4.2 armcrc - Critical mach number given $Cp$

DOUBLE PRECISION FUNCTION AR04AB(G,CP,IERR)
  DOUBLE PRECISION G, CP
  INTEGER IERR

Compute given the critical mach number given $Cp$ .

Performance
Iterative

Arguments

G - REAL: ENTRY: Specific heat constant $γ$ .
CP - REAL: ENTRY: Critical pressure coefficent $C p$ .
IERR - INTEGER: EXIT: (optional) Return status code.

Status codes

-1: Specific heat ratio $γ≤ 1$ .
-2: Given $Cp$ out of range.
-3: Iterative solver failed.

Return Value
Critical mach number $Mcrit$ or NAN on error.

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