Simulation  on characteristics of louveredfin type heat exchanger in airflow maldistribution
HAI Ying1，CHEN Jingyu1， LI Wengui2

（1. School of Electrical and Mechanical Engineering， University of Jiaxing，Jiaxing  314001, China;
2. Zhejiang Jiaxing Cooler Co.Ltd., Jiaxing 314001, China）
Abstract: Aiming at the flow and thermal performance of louveredfin heat transfer, experimental study on the heat transfer with two different configurations (single and threescreen mode) were carried out on a wind tunnel test rig. The parameters of heat transfer and flow with nonuniform inlet flow conditions were measured experimentally, these served to determine the heat transfer correlation for the fin type using the distributed parameter model and the Wilson plot method. Numerical simulation was established, to predict the thermal performance of heat exchangers in nonuniform flow conditions. The results show that a drop of up to 8.2% is found in the overall heat transfer coefficient for nonuniform flow profile. Some calculated results are verified by the experimental datas, which show they are reasonable.The numerical code can be used as a design tool to develop more efficient heat exchangers.
Key words: heat exchanger；airflow maldistribution；experiment；numerical simulation