Introduction

3.8.1 Introduction

This function group computes an isothermal flow through a long ducts as described in [VLStreeter1966] for which neither fanno nor rayleigh flow is applicable due to the assumptions of the two latter.

The following properties are computed:

p*p ,rr*,MM* — Table 6: Isothermal flow properties

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I	Property	Description

1	$M$	Mach number
2	$pp ,rr,MM*$	Non-stagnative ratios
3	$ρ/ρ*$	Density ratio
5	$V/V*$	Velocity ratio
6	$p01/p02$	Stagnation pressure ratio
6	$T01/T02$	Stagnation temperature ratio
7	$(4fL)/D$	Characteristic line