摘要
文章基于电力机车走行风相变散热器的结构模型,建立了其等效热阻网络,分析其传热特性,推导了风速影响下散热量的修正系数关系式;通过风洞试验,研究了散热器在不同风速、不同水流量下散热量和热阻的变化特性,以及散热器在不同风速下的热启动性能及阻力特性。结果表明:散热器散热量随风速及水流量的增大而不断增大,而散热器热阻则刚好相反;散热器静态启动时间和散热启动时间均小于4 min;单个散热器产生阻力仅为机车牵引力的0.17‰,对整车阻力影响很小。
Based on the structural model of the phase change radiator using running airflow of the electric locomotive,the equivalent thermal resistance network of the radiator is established,its heat transfer characteristics are analyzed,and the relation equation of correction coefficient of heat dissipation under the influence of wind speed is derived.Through wind tunnel tests,the variation characteristics of heat dissipation and thermal resistance of radiators under different wind speeds and water flow rates are studied,as well as the hot-start performance and drag performance of radiators under different wind speeds.The results show that:the radiator heat dissipation increases continuously with the increase of wind speed and water flow,while the radiator thermal resistance is just the opposite;radiator static start-up time and heat dissipation start-up time is less than 4 min;a single radiator produces resistance only 0.17‰of the locomotive traction force,the impact of the whole car resistance is very small.
作者
王位
杨天智
刘强
朱茂华
江乐新
陈志毅
张良丰
WANG Wei;YANG Tianzhi;LIU Qiang;ZHU Maohua;JIANG Lexin;CHEN Zhiyi;ZHANG Liangfeng(The State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive,Zhuzhou 412001,China;CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001,China;Hunan Rail Transit Vehicle Thermal and Fluid System Engineering Technology Research Center,Zhuzhou 412001,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)
出处
《电力机车与城轨车辆》
2024年第2期7-13,共7页
Electric Locomotives & Mass Transit Vehicles
基金
中国国家铁路集团有限公司科技研究项目(N2021J054)。
关键词
走行风
相变散热器
风洞试验
传热性能
阻力性能
running airflow
phase change radiator
wind tunnel test
heat transfer performance
drag performance
