Stability analysis of density-wave oscillations in heated channels

Dynamic analyses of two-phase flow in uniformly and nonuniformly heated channels have been carried out using the drift-flux model for two-phase flow. The utilization of a constant characteristic velocity v0 in the definitions of the phase change number N/sub pch/, the dimensionless inlet velocity anti v, and the Froude number Fr has made convenient the study of the effect of different inlet velocities on the stability of the heated channel. The results of the linear analysis for the uniform heat flux (UHF) case demonstrate the importance of the void distribution parameter. Values of the void distribution parameter C0 > 1 clearly lead to better agreement with experiment than do values of C0 = 1, especially for large subcooling number N/sub sub/ (> 2). The effect of the drift velocity V/sub gj/ on stability is found to be negligible