水在波纹板间结冰过程的数值模拟  

Numerical simulation of the water frozen between corrugated plates

作　　者：吴华新[1] 孙刚[1] 张文雍[2] 王飞[3] 田宝仁 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150001 [3]太原理工大学环境科学与工程学院,山西太原230024 [4]四平吉泰换热器厂技术部,吉林四平136001

出　　处：《哈尔滨工程大学学报》2008年第10期1046-1049,共4页Journal of Harbin Engineering University

摘　　要：在空调新风机组中采用空气-水板式换热器代替翅片管式换热器,可防止我国三北地区由于采暖初期与末期热媒的温度偏低,翅片管式换热器加热0℃以下的空气时易结冰,影响正常工作的现象发生.空气-水波纹板式换热器利用波纹板片之间形成三维复杂流道,流体以较小的流速在其间流动就可形成湍流,湍流的形成带来剧烈的能量掺混可有效防止冰层在波纹表面的形成.利用FLUENT软件Solidification/Melting模型分别模拟了静态水与动态水在波纹板间的三维结冰过程,揭示了波纹板式换热器的波纹板片流道结构形式可有效防止流水结冰现象的发生,为相关产品的开发与优化提供依据.Air-water plate heat exchangers （PHE） are used to take the place of tube-fin type heat exchangers in the air handling units of HVAC heating systems, wich is effective method to prevent the tube-fin type heater from being iced up, when the heat carrier＇s temperature is low at the initial or the last period of the heating stage in the north of China. Corrugated plates are employed to carry the mix of air-water in the PHE and are made by stamping or embossing a wavy surface on sheet metal, forming complex 3-D flow passages. In these narrow and tortuous passages, water is highly interrupted and experiences turbulent flow even with a low velocity of flow. This swirling turbulent flow can prevent ice from forming. The behavior of water while becoming frozen, both in the motionless state and also when flowing, was simulated and analyzed using the Solidification/Melting Model of the CFD software Fluent. The results show that the corrugated passages of the PHE are icing-resistant structures when water is flowing. This will be useful for manufacturing and optimizing air-water plate heaters.

关 键 词：波纹板 一次表面 结冰过程 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程]