Effects of Power Pulsations on Natural Convection from Discrete Heat Sources

摘要

The natural convection heat transfer response of an array of heaters flushmounted on a vertical test surface in water to periodic input power has been investigated. Two types of periodic input power variations were examined: a triangular wave and an approximate square wave. The resulting heater temperatures over several cycles were measured for mean values of 0.5, 1.0, 2.0, and 3.0 watts and varying amplitudes. The frequency of the input power pattern was also varied, from 0.025 to 0.1 Hz. The measured heater temperatures were compared with the responses for steady input power equal to the mean of the periodic input.