Nonlinear stability analysis of density-wave oscillations in nonuniformly heated channels

Conference · Thu Jan 01 04:00:00 EST 1987 · Trans. Am. Nucl. Soc.; (United States)

OSTI ID:5432985

Rizwan-uddin,; Dorning, J J

In order to be relevant to two-phase-flow density-wave oscillations in real engineering systems such as most types of heat exchangers and boiling water reactors, stability analyses must be carried out for nonuniformly heated channels. Further, in order to fully understand the nature of the instability, when one occurs, and the corresponding bifurcation phenomena, a nonlinear as well as linear stability analysis must be performed. Previously, the authors have reported the results of a linear stability analysis for nonuniformly heated channels, and linear and nonlinear analyses for uniformly heated channels, all done using the drift flux model for the two-phase flow. This model is rather realistic for most transients of interest, though a two-fluid model with accurate dynamic constitutive relations may be necessary for fast transients. Here the results are reported of a nonlinear Lindstedt-Pioncare analysis of density-wave instabilities in nonuniformly heated channels with the two-phase flow represented by the drift flux model.

• Research Organization: Univ. of Virginia, Charlottesville
• OSTI ID: 5432985
• Report Number(s): CONF-870601-
• Conference Information: Journal Name: Trans. Am. Nucl. Soc.; (United States) Journal Volume: 54
• Country of Publication: United States
• Language: English

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