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clc
// Example 5.5.py
// Consider a convergent divergent duct with an exit to throat area ratio of 1.6.
// Calculate the exit to reservoir pressure ratio required to achieve sonic flow
// at the throat, but subsonic flow everywhere else.
// Variable declaration
Ae_by_At = 1.6 // ratio of exit to throat area
// Calculations
// since M = 1 at the throat Mt = Astar
// Ae/At = Ae/Astar = 1.6
// from table A1 for Ae/Astar = 1.6
po_by_pe = 1.1117 // po/pe
pe_by_po = 1/po_by_pe // pe/po
// Results
printf("\n Exit to reservoir required pressure ratio is %.1f", pe_by_po)
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