Abstract
ABSTRACTThe transient critical heat flux (CHF) of subcooled water flowing in a narrow channel was measured. A small tube with an inner diameter of 1.0 mm was heated by a direct current. The effects of the subcooling, pressure, flow velocity, and e-folding times of the heat generation rate on the transient CHF were investigated. The experimental result showed that an initial temperature overshoot appeared as the e-folding time of the heat generation rate decreased. The CHF increased with a shorter e-folding time of the heat generation rate. Finally, an empirical correlation for the transient CHF was obtained.
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