首页|Impact of geometrical surface modification on spray cooling heat transfer performance with liquid nitrogen: An experimental investigation
Impact of geometrical surface modification on spray cooling heat transfer performance with liquid nitrogen: An experimental investigation
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NSTL
Elsevier
In this study， an experimental study on the spray cooling using liquid nitrogen (LN2) as the coolant was studied。 Accordingly， an open-cycle experimental setup for cryogenic spray cooling was built。 Investigation of spray cooling heat transfer performance on both plain and straight-grooved surfaces was carried out。 The spray morphology was captured using the visual technique in the cryogenic system and the spray angles under different injection pressures were obtained。 Additionally， a parametric study of heat transfer characteristics on the straight-grooved surfaces was carried out。 The results have shown that the spray angle， at first， increases as with the inlet pressure， which is followed by a decrease。 The straight-grooved surface significantly improved the spray cooling heat transfer compared to its plain counterpart by the maximum improvement rate of 64。2%。 However， temperature uniformity was poorer。 As the groove depth increases， the heat flux experiences increases at first， followed by a decrease。 Finally， it was observed that the increase in groove width reduces the heat flux。
NSTL
Elsevier
