An Instability Analysis of Ventilated Channels

[+] Author and Article Information
R. Taleyarkhan, M. Podowski, R. T. Lahey

Rensselaer Polytechnic Institute, Department of Nuclear Engineering, Troy, N.Y. 12181

J. Heat Transfer 107(1), 175-181 (Feb 01, 1985) (7 pages) doi:10.1115/1.3247375 History: Received August 04, 1983; Online October 20, 2009


A mathematical model has been developed for the linear stability analyses of a system of ventilated parallel boiling channels. The model accomodates phasic slip, nonuniform power distribution, local losses, heater wall dynamics, channel-to-channel (radial) power skews, discrete or continuous ventilation between the channels, turbulent mixing between the channels, various donor-cell options for the lateral transport of energy and momentum, and a transverse momentum equation. A special matrix reduction algorithm was developed to efficiently solve the system of linearized, Laplace-transformed, nodal equations. A parametric study revealed that phasic slip, axial power distribution, heater wall dynamics, local losses, lateral ventilation, and radial power skew can have a significant effect on the stability characteristics of the system [5] . Comparisons were made with the available experimental data, and good agreement was achieved.

Copyright © 1985 by ASME
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