Predictions of the Structure of Turbulent, Moderately Underexpanded Jets

[+] Author and Article Information
P. S. Cumber, M. Fairweather

British Gas plc, Research and Technology, Gas Research Centre, Loughborough LE11 3QU, England

S. A. E. G. Falle

Department of Applied Mathematics, The University of Leeds, Leeds LS2 9JT, England

J. R. Giddings

Mantis Numerics Ltd., 46 The Calls, Leeds LS2 7EY, England

J. Fluids Eng 116(4), 707-713 (Dec 01, 1994) (7 pages) doi:10.1115/1.2911839 History: Received May 12, 1993; Revised February 23, 1994; Online May 23, 2008


A mathematical model capable of predicting the structure of turbulent, underexpanded jets is described. The model is based on solutions of the fluid flow equations obtained using a second-order accurate, finite-volume integration scheme coupled to an adaptive grid algorithm. Turbulence within these jets is modelled using a k-ε approach coupled to the compressible dissipation rate model of Sarkar et al. (1991a). Comparison of model predictions and experimental data, reported in the literature, on a number of moderately underexpanded jets demonstrate significant improvements over results derived using the standard k-ε approach, and the adequacy of the compressibility corrected turbulence model for predicting such jets.

Copyright © 1994 by The American Society of Mechanical Engineers
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