Melting Powder Particles in a Low-Pressure Plasma Jet

[+] Author and Article Information
D. Y. C. Wei, D. Apelian

Materials Engineering, Drexel University, Philadelphia, PA 19104

B. Farouk

Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104

J. Heat Transfer 109(4), 971-976 (Nov 01, 1987) (6 pages) doi:10.1115/1.3248212 History: Received September 02, 1986; Online October 20, 2009


A numerical model has been developed to predict the temperature history of metal particles injected in a low-pressure (supersonic) d-c plasma jet. The temperature and velocity fields of the plasma jet are predicted by solving the parabolized compressible Navier–Stokes equations using a spatial marching scheme. Particle trajectories and heat transfer characteristics are calculated using the predicted plasma jet temperature and velocity fields. Correction factors have been introduced to take into account the noncontinuum effects encountered in the low-pressure environment. The plasma jet profiles as well as the particle/plasma interactions under different jet pressure ratios (from underexpanded to overexpanded cases) have been investigated.

Copyright © 1987 by ASME
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