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RESEARCH PAPERS

Numerical Calculations of Turbulent Swirling Flow

[+] Author and Article Information
I. Kubo

Komatsu Ltd., Nakase, Kawasaki, Kanadawa-ken, Japan

F. C. Gouldin

School of Mechanical and Aerospace Engineering, Cornell University, Ithica, N. Y.

J. Fluids Eng 97(3), 310-315 (Sep 01, 1975) (6 pages) doi:10.1115/1.3447308 History: Received June 03, 1975; Online October 12, 2010

Abstract

A numerical technique is developed for solving axisymmetric, incompressible, turbulent swirling flow problems. The Reynolds stresses are expressed in terms of a scalar turbulent viscosity, μt = ρCμ k2 /ε. The turbulent kinetic energy, k, and ε, the turbulent energy dissipation rate, are obtained by solving the corresponding transport equations; Cμ is an empirical constant. Flow calculation results are presented for the coaxial flow configuration shown in Fig. 1. Of particular interest is the presence of flow recirculation due to vortex breakdown. Effects of inner and outer swirl, axial velocity ratio and Reynolds number on the formation, size, and location of the recirculation zone are considered.

Copyright © 1975 by ASME
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