中文摘要：

利用计算流体力学（CFD）方法，通过求解RANS方程、RNG k-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．

英文摘要：

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.