arfisa - Isentropic relations given A/A*

void arfisa(double g, double a, bool is_sub, double result[5], int *ierr);

Compute the isentropic relations given the critical area ratio $A/A *$ .

Performance
Iterative

Arguments

G - REAL: ENTRY: Specific heat constant $γ$ .
A - REAL: ENTRY: Critical area ratio $A/A* ≥1$ .
IS_SUB - BOOLEAN: ENTRY: Whether the mach number correspdonding to $A/A *$ is assumed to be sub- or super- sonic.
RESULT - ARRAY OF REAL: EXIT: Array with result properties as described in 3.
IERR - INTEGER: EXIT: (optional) Return status code.

Status codes