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本文实验研究了镜面抛光铜表面和两组不同高度镍纳米锥表面的喷雾冷却换热特性。接触角的实验与分析发现,纳米锥表面的接触角远小于抛光铜表面,且纳米锥高度越高,接触角越小。三组表面在喷雾冷却单相换热区换热性能相近,抛光铜表面换热性能略优。纳米锥表面在喷雾冷却两相换热区展现出更强的换热性能,且纳米锥高度越高,接触角越小,换热性能越好,CHF越高。
In this paper, we studied the spray cooling heat transfer characteristics of the mirror-polished copper surface and two sets of nickel nano-cone surfaces with different heights. The experiment and analysis of contact angle showed that the contact angle of the nanocone surface is much smaller than that of the polished copper surface, and the higher the nanocone height is, the smaller the contact angle is. Three groups of surfaces in the spray cooling single-phase heat transfer zone heat transfer performance similar to slightly better surface copper heat transfer performance. The surface of nanocone shows more heat transfer performance in the spray cooling two-phase heat exchange zone. The higher the height of the nanocone, the smaller the contact angle, the better the heat exchange performance, the higher the CHF.