Compressible Flow Subroutine Library
Programming Reference Manual
Version 1.0 DD-00008-010E

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:

Table 6: Isothermal flow properties



I Property Description



1 M Mach number
2 p*p ,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