摘要
为研究翅片间距对H型翅片管传热和阻力特性的影响,通过搭建热态风洞实验台,进行了翅片高度分别为70 mm、95 mm单双H型翅片管16种实验段,设计了12.7 mm、16 mm、20 mm、24 mm 4个翅间距。针对每一种翅片管型,进行了6 m/s、8 m/s、10 m/s、12 m/s、15 m/s、18 m/s不同空气流速下H型翅片管传热和阻力特性的对比实验性能测试。同时通过数值模拟,对比分析H型翅片管的阻力特性及传热性质。实际生产中对H翅片结构尺寸进行了优化,在河南某1000 MW低温省煤器设计中采用70 mm×70 mm翅片管节约钢材约159 t/单台炉。
In order to study the influence of fin spacing on heat transfer and resistance characteristics of H-finned tubes,16 kinds of experimental sections of single and double H-finned tubes with fin heights of 70 mm and 95 mm respectively were carried out by setting up a hot wind tunnel experiment table.Four types of fin spacing,whose length are 12.7 mm,16 mm,20 mm and 24 mm respectively,were designed.For each fin tube type,the heat transfer and resistance characteristics of H-finned tubes under different air flow rates of 6 m/s,8 m/s,10 m/s,12 m/s,15 m/s and 18 m/s were tested.Meanwhile,the resistance and heat transfer characteristics of H-finned tubes were compared and analyzed through numerical simulation.The structural dimensions of H-finned tubes were optimized in actual production.70 mm×70 mm finned tubes were used in the design of a 1000 MW low-temperature economizer in Henan province to save about 159 tons of steel per furnace.
作者
丁岩峰
DING Yanfeng(State Grid Electric Power Research Institute,Beijing 100070,China)
出处
《电力科学与工程》
2020年第11期74-78,共5页
Electric Power Science and Engineering
关键词
H型翅片管
阻力
传热
实验
特性
H type finned tube
resistance
heat transfer
experiment
characteristics
