旋流板对烟囱流场及除湿特性影响的数值研究  

Effects of Swirl Vane on Flow Field and Dehumidification Characteristics of a Chimney

作　　者：戴丽萍[1] 周强[1] 姚世刚 张惠[1] 王晓东[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《动力工程学报》2016年第10期842-848,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51176046);中央高校基本科研业务费专项资金资助项目(2015MS37)

摘　　要：利用计算流体力学(CFD)方法,通过求解RANS方程、RNGk-ε湍流模型和DPM离散相模型,对某电站锅炉烟囱加装旋流板前、后的流场特性及水滴运动特性进行了模拟和分析,在此基础上进一步比较了旋流板不同叶片仰角、安装高度、安装级数等参数对烟囱内部流场以及除湿效率的影响.结果表明:综合考虑压力损失和除湿效果2方面因素,叶片仰角为45°、安装高度为30m的单级旋流板为最优选择.Simulation and analysis were conducted on the flow field and droplet trajectory in a boiler chim- ney with and without swirl vane using CFD software combined with RANS equations, RNG/e-ε turbulence model and discrete phase model, based on which, the effects of following factors on the flow field and de- humidification efficiency of the chimney were analyzed, such as the vane elevation, installation height and stage number, etc. Results show that by comprehensively considering the pressure loss and dehumidifica tion effect, the optimal swirl vane would be of the single-stage kind, with a vane elevation of 45° and an in stallation height of 30 m.

关 键 词：湿法烟气脱硫 烟囱 旋流板 除湿 数值模拟 

分 类 号：TK284.5[动力工程及工程热物理—动力机械及工程]