喷嘴类型对制冷剂喷雾雾化特性及表面传热的影响研究  

Influence of Nozzle Type on Spray Characteristics and Surface Heat Transfer in Cryogen Spray Cooling

作　　者：王锐[1] 杨涛[1] 周致富[1] 陈斌[1] 王国祥[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2017年第12期2646-2650,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51336006);中央高校基本科研业务费专项基金项目

摘　　要：制冷剂瞬态喷雾冷却是辅助激光手术治疗皮肤病的重要手段,然而当前临床应用中存在冷却量不足、表面冷却不均匀等问题。喷嘴类型对制冷剂喷雾雾化均匀性及表面换热效率有显著影响,本文对比研究了直管喷嘴、膨胀腔喷嘴及环流气体辅助两相喷嘴进行R404A喷雾冷却时的雾化特性及表面传热特性。膨胀腔喷嘴及两相喷嘴具有更高的喷雾中心浓度,较直管喷嘴具有更高的冷却效率,并提高了冷却保护的均匀性及冷却范围控制的精确性,有望成为改善临床治疗效果的替代喷嘴。Cryogen laser dermatology spray cooling has been applied to protect epidermis from thermal damage in However, present clinical application suffers insufficient cooling capacity and non-uniform surface cooling. In present paper, the comparison research of nozzle type is conducted to investigate its influence on spray characteristics and surface heat transfer in cryogen spray cooling. The results show that the substitution of expansion-chambered nozzle or two-phase nozzle may improve therapy outcomes for their high cooling efficiency and precise cooling control.

关 键 词：喷嘴 制冷剂 雾化 传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TQ026.4[动力工程及工程热物理—热能工程]