花柄管管内单相传热与流动特性的实验与数值研究  

Experimental and Numerical Study on Single-Phase Heat Transfer and Flow Characteristics in Flower Tubes

作　　者：张兰 候朝兵 刘尚卿 张江辉[1] Zhang Lan;Hou Chaobing;Liu Shangqing;Zhang Jianghui(Eletromechanical engineering college,Qingdao University of Science and Technology,Qingdao,266061)

机构地区：[1]青岛科技大学机电工程学院

出　　处：《制冷与空调（四川）》2019年第5期565-569,共5页Refrigeration and Air Conditioning

摘　　要：对光滑水平管道进行实验和数值模拟,通过对比换热系数验证数值模拟的可靠性。再对花柄管进行CFD数值模拟,结果表明;花柄管波浪状表面对制冷剂起到一定的扰流作用,并产生涡流加强换热;平均换热系数沿进口段至出口段方向减小且分布逐渐均匀。实验台热损失在3%内,对实验结果影响较小,确保实验数据的可靠性。In order to verify the reliability of the numerical simulation,the experimental and numerical simulations of the smooth horizontal tube were carried out by comparing the Heat transfer coefficient.Then the CFD numerical simulation of the flower tube is carried out.The results show that the wavy surface of the flower tube plays a certain turbulence effect on the refrigerant and generates eddy current to enhance heat transfer.The average heat transfer coefficient decreases along the wall from inlet to the outlet.And the distribution is gradually uniform.The experimental heat loss is within 3%,which has little effect on the experimental results and ensures the reliability of the experimental data.

关 键 词：花柄管 单相 数值模拟 传热 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]