蒸发式冷凝器喷嘴流量均匀性数值研究  

Numerical study on nozzle flow uniformity for evaporative condenser

作　　者：陈良才[1] 焦彦红[1] 冯志力[1] 刘志春[1] 

机构地区：[1]华中科技大学

出　　处：《制冷与空调》2011年第5期67-71,共5页Refrigeration and Air-Conditioning

基　　金：国家重点基础研究发展规划资助项目(2007CB2006900)

摘　　要：喷嘴出口流量均匀性对蒸发式冷凝器的换热效果有直接影响。本文用FLUENT软件对40种不同工况下喷淋系统内的水流情况进行数值模拟,并比较和研究影响喷嘴出口流量均匀性的主要因素。结果表明,结构对称可使各喷淋管的喷嘴出口流量分布基本相同;小直径喷嘴的出口流量均匀性良好;喷嘴直径较大时,随总喷淋量的增大,喷嘴出口流量的差异也增大;加装压力平衡管后,喷嘴出口流量均匀性会提高。The nozzle flow uniformity exerts an influence directly on the heat transfer of the evaporative condenser.Numerical simulates the flow of spray tubes and nozzles in the system at 40 various cases with FLUENT.Analyzes and compares the fundamental factors affecting the nozzle flow uniformity.The results show that the nozzle flow distribution of each spray tube is approximately the same as others because of the symmetric structure,a spray system with the smaller diameter nozzles has a better uniformity than that with the bigger diameter nozzles,the nozzle flow difference gets larger as the total spray flow increasing at a bigger diameter nozzle,installing a pressure equilibrium tube is helpful to improve the nozzle flow uniformity.

关 键 词：蒸发式冷凝器 喷嘴 均匀性 压力平衡管 数值研究 

分 类 号：TB657[一般工业技术—制冷工程]