联箱匹配对U型布置并联管组换热器流量分配影响研究  

Study on Effect of Header Match on Flow Distribution in U-type Arrangement Parallel Manifold of Heat Exchanger

作　　者：曲新鹤 孙中宁 丁铭 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001

出　　处：《原子能科学技术》2015年第4期623-628,共6页Atomic Energy Science and Technology

摘　　要：借助ANSYS FLUENT软件,使用Realizable k-ε湍流模型对U型布置的动量恢复型并联管组模型进行数值计算,并从联箱内压力变化的角度分析推导得出最佳联箱截面比(OARH)的计算公式。结果表明,分配联箱和汇流联箱截面比对并联管组流量分配有很大影响,使用数值计算和分析方法得出的OARH均在0.6左右。本文提出的联箱尺寸匹配方法可增强并联管组换热器流量分配均匀性,并为换热器的联箱设计提供理论指导。T he numerical simulation to U‐type momentum regaining parallel manifold was completed with Realizable k‐εmodel by means of the ANSYS FLUENT software . An analytic method for the optimal cross section area ratio of the header （OARH） was obtained on the basis of the pressure change within the headers .The results show that the cross section area ratio of the dividing header to the combining header has a large effect on the flow distribution in the manifold ,and the OARH obtained by both numeri‐cal simulation and analytic method is about 0.6 . The method to match header can enhance the flow distribution uniformity in the parallel manifold of heat exchanger ,and offer a guide for the design of the manifold of heat exchanger .

关 键 词：最佳联箱截面比 并联管组 U型布置 动量恢复 流量分配 Realizable k-ε模型 

分 类 号：TK172[动力工程及工程热物理—热能工程]