摘要
管内插入物是强化管内换热的有效方法,内插可旋转结构在强化换热的同时还具有良好的除垢抑垢效果。实验研究了内插螺旋弹簧转子的管内换热以及转子的转动特性。结果表明,与光管相比,换热增强30%,但流动阻力增加5倍左右,转子的参数需要进一步优化以减小阻力。转子的转速与来流速度呈线性递增关系,与入口处转子相比,下游转子的转速逐渐降低,单螺旋转子转速降低的幅度大于双螺旋转子。双螺旋结构连续稳定运行半年以上,该转子强化换热及除垢抑垢性能稳定。
Internal inserts can effectively enhance heat transfer, and the rotating inserts also have good anti-scaling and scale removing performance. The heat transfer, flow resistance and rotating characteristics of the inserted spring rotors in circular tube were experimentally investigated. The results indicate that the heat transfer is 30% enhanced and the friction resistance is 5 times increased compared with those in plain tube. The structural parameters of the rotors should be further optimized to reduce the friction resistance. The rotating speed of the rotors has a linear relationship with the stream velocity. The rotating speeds of the downstream rotors are smaller than the upstream ones＇ while the single helix rotors＇ are much smaller than the double helix ones＇. The double helix rotors have been revolved for more than half a year without any problems, it is expected to have good anti-scaling and scale removing performance.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第12期2105-2108,共4页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展规划(No.2007CB206901)
关键词
弹簧转子
强化换热
阻力特性
转子转速
实验研究
spring rotor
heat transfer enhancement
friction factor
rotor speed
experimental study
