Abstract
Throughflow effects on the flow in a natural circulation loop are investigated analytically. The loop consists of two vertical insulated branches with a point heat source at the bottom and a point heat sink at the top. Hot liquid is extracted continuously at the hottest spot (just downstream of the heat source) and replaced by cold liquid injection just downstream of the heat sink. A one-dimensional spatial model is employed to calculate flow rates and temperature distributions for various loop parameters and through-flow rates. Steady state, transient behavior, and stability characteristics are studied. It is found that the throughflow stabilizes the motion in the loop.
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