PCHE叶轮整流效果数值模拟研究  

Numerical Simulation Study of Impeller Rectification Effect in PCHE

作　　者：王鑫[1] 杨斌[2] 李炳熙[1] 王维[1] WANG Xin;YANG Bin;LI Bing-xi;WANG Wei(School of Energy Science and Technology,Harbin Institute of Technology,Harbin 150001,China;Beijing Institute of Precision Electromechanical Control Equipment,Beijing 10071,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]北京精密机电控制设备研究所,北京100071

出　　处：《节能技术》2024年第2期122-127,共6页Energy Conservation Technology

基　　金：国家自然科学基金青年科学基金项目(52106082);中国博士后科学基金特别资助(2022T150160);中国广核集团-哈尔滨工业大学先进核能与新能源研究院(CGN-HIT202308);黑龙江省自然科学基金联合引导项目(LH2022E064)。

摘　　要：PCHE入口处有着成千上万的微型通道,流体进入通道时存在流量分配不均匀的问题,导致PCHE整体换热性能差,本文提出了一种叶轮型整流器来提高流量的均匀性分配。通过数值模拟的方法,以流体流量不均匀系数α和压降P_(l)作为性能指标进行了参数化对比,分析了整流器结构参数(中心圆环D、叶片的数量N和叶片螺距P)对入口封头内流场的影响。研究结果表明,叶轮对中心集中流量的破坏、诱导产生的多个涡流对流场均匀发展起到关键性作用,中心圆环直径越小,螺距越小时,叶轮的整流效果更好,四叶片叶轮由于其几何对称性,引导流体更均匀的分布在流道。There are thousands of micro-channels at the entrance of PCHE,and there is a problem of uneven flow distribution when the fluid enters the channel,resulting in poor overall heat exchange performance of PCHE.By numerical simulation,the influence of the rectifier structural parameters(central ring D,number of blades N and blade pitch P)on the flow field in the inlet head was analyzed by parameterizing and comparing the fluid flow inhomogeneity coefficient α and pressure drop P_(l) as performance indicators.The results show that the impeller plays a key role in the destruction of the central concentrated flow rate and the uniform development of the induced multiple eddy currents on the flow field,the smaller the diameter of the central ring and the smaller the pitch,the better the rectification effect of the impeller,and the more uniform distribution of the guided fluid in the flow channel due to the geometric symmetry of the four-blade impeller.

关 键 词：印刷电路板换热器 流量均匀性 叶轮整流器 

分 类 号：TK018[动力工程及工程热物理]