螺旋翅片管翅片间气固两相流颗粒速度特性的实验研究  

Experimental Study on Particle Velocity Characteristics of Gas-Solid Two-Phase Flow Between Fins of Spiral Fin Tube

作　　者：郑鹏[1] 孙奉仲[1] 韩志航 ZHENG Peng;SUN Feng-zhong;HAN Zhi-hang(Shandong University;China General Nuclear Power Group Co.Ltd.)

机构地区：[1]山东大学,山东济南250061 [2]中国广核集团有限公司

出　　处：《电站系统工程》2021年第4期17-21,共5页Power System Engineering

摘　　要：考虑到电厂锅炉尾部烟道烟温低,飞灰颗粒硬度大,螺旋翅片管以其良好的换热效果和耐磨特性,被广泛应用于上述烟气环境中。在实际运行过程中,螺旋翅片管的磨损明显受到固相颗粒速度分布特性的影响。通过搭建基于PDA测量技术的气固两相流测试实验台,对螺旋翅片管翅片间气固两相颗粒速度特性进行了实验研究。结果表明,当来流速度相同时,在相同翅片高度的条件下,翅片间入口处固相颗粒的速度随着翅片间距的减小而减小;而在相同的翅片间距条件下,靠近基管处固相颗粒的速度随着翅片高度的增加而减小。Considering the low gas temperature and high hardness of fly ash particles in the tail flue of power plant boiler,spiral fin tube is widely used in the flue gas environment due to its good heat transfer performance and wear-resisting property. In actual operation, the wear of spiral finned tube is evidently affected by the velocity distribution characteristics of solid particles. The gas-solid two-phase flow test platform based on PDA measurement technology was built to explore the gas-solid two-phase particle velocity characteristics between the fins of the spiral fin tube. When the incoming flow velocity is unchanged, for the spiral finned tube with the same fin height, the velocity of the solid particles at the entrance between the fins decreases with the decrease of the fin spacing;while under the same fin spacing condition,the velocity of the solid particles near the base tube decreases with the increase of the fin height.

关 键 词：螺旋翅片管 气固两相流 速度特性 翅片参数 磨损 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]