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在具有温度梯度的凝结表面上进行了水-酒精混合蒸气的Marangoni凝结的实验。研究了3种流速(V=2、4和6 m/s)对凝结表面上不同位置热流密度的影响。研究发现:流速对纯水蒸气和混合蒸气凝结时的表面温差和热流密度的影响是不同的。对纯水蒸气而言,流速增大后,表面温差和热流密度是增加的,并加剧了热流密度的分布不均(热流密度的相对差值在压力为31.2 kPa,流速2 m/s时为0.538,流速4 m/s时为0.6,流速6 m/s时为0.625)。对于混合蒸气,表面温差随流速的增加而减小,而热流密度增大很少(压力31.2 kPa,流速2 m/s时为0.186,4 m/s时为0.182,6m/s时为0.098)。
Experiments with Marangoni condensation of water-alcohol mixed vapors were performed on the condensed surface with temperature gradient. The effects of three flow rates (V = 2, 4, and 6 m / s) on the heat flux at different locations on the coagulation surface were investigated. It is found that the effect of flow rate on the surface temperature difference and heat flux density of pure water vapor and mixed vapor is different. For pure water vapor, the surface temperature difference and heat flux increase with increasing flow rate, which aggravates the uneven distribution of heat flux (the relative difference of heat flux at a pressure of 31.2 kPa and at a flow rate of 2 m / s 0.538, 0.6 at a flow rate of 4 m / s, and 0.625 at a flow rate of 6 m / s). For the mixed vapor, the surface temperature difference decreases with increasing flow rate, while the heat flux density increases little (pressure is 31.2 kPa, flow rate is 0.186 at 2 m / s, 0.182 at 4 m / s, and 0.098 at 6 m / s) .