Dusty Gas Flow in a Converging-Diverging Nozzle

[+] Author and Article Information
O. Igra, I. Elperin, G. Ben-Dor

The Pearelstone Center for Aeronautical Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel

J. Fluids Eng 121(4), 908-913 (Dec 01, 1999) (6 pages) doi:10.1115/1.2823554 History: Received May 22, 1998; Revised September 10, 1999; Online December 04, 2007


The flow in a converging-diverging nozzle is studied numerically. The flowing medium is a suspension composed of gas seeded with small, spherical, solid particles. The solution covers the entire flow history, from its initiation and until a steady state flow is reached. The covered flow domain includes both the flow field inside the nozzle and part of the free jet flow outside of the nozzle exit plane. The solution is repeated for different solid particle diameters, ranging from 0.5 μm to 50 μm, and different dust loading ratios. It is shown that the presence of solid particles in the flow has a significant effect on the developed flow field, inside and outside the nozzle. In particular, by a proper choice of particles diameter lateral pressure waves and the secondary shock wave can be significantly attenuated. The solid particles size has also a marked effect on the position and size of the Mach disk appearing in the free jet flow. It is also shown that in a suspension case a steady state flow is reached faster than in a similar pure gas flow.

Copyright © 1999 by The American Society of Mechanical Engineers
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