3.5.1 Introduction

This function group computes the thermodynamic properties of isentropic flow for a calorically perfect gas as described in [naca1135] with one-dimensional variable changes. Isentropic flow assumes the following continuity equation:

The momentum equation is:

The following properties are computed:

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Table 3: Isentropic flow properties

I	Property	Description
1		Mach number
2		Pressure ratio
3		Density ratio
4		Temperature ratio
5		Critical area ratio

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