文档介绍：哈尔滨工业大学学报
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY
哈尔滨工业大学学报
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY
Vol. 42 No. 3
Mar. 2010
第42卷第3期
20 1 0年3月
半干法压力旋流式喷嘴雾化性能数值模拟
陈国庆，高继慧，高建民，秦裕琨
(哈尔滨工业大学燃烧工程研究所，哈尔滨150001 ,chengqhit@ 163. com)
摘要：对压力旋流式脱硫雾化喷嘴雾化特性进行了数值模拟研究，分析了各因素对雾化液滴粒径的影响, 得到了喷嘴下游流场内液滴粒径和速度空间分布•计算结果表明：雾化液滴粒径与雾化压力和喷嘴直径成正 比，与雾化介质黏度和表面张力成反比；液滴速度沿轴向方向急剧衰减，在距喷嘴200 mm处几乎不发生变 化，而在径向方向上呈中心低，边缘高的分布；在破碎和聚合的作用下，液滴粒径沿轴向方向呈先减小、后增 加的趋势，大颗粒主要集中在雾炬外围•试验结果与计算值基本吻合.
关键词：压力雾化；雾化特性;半干法；数值模拟
中图分类号：TK224. 1 文献标志码：A 文章编号：0367 - 6234(2010)03 - 0437 - 05
Numerical simulation on atomizing performance of pressure
swirl nozzle for semi-drying FGD
CHEN Guo-qing, GAO Ji-hui, GAO Jian-min, QIN Yu-kun
(Combustion Engineering Research Institute9 Harbin Institute of Technology, Harbin 15001,China,chengqhit@ 163. com)
Abstract: The numerical simulation on spray characteristic of pressure swirl nozzle was carried out, and the main factors effecting the atomizing performance of the nozzle were studied. The distributions of velocity and diameter of droplets were obtained at different special sections. Simulation results were compared with the ex・ perimental results. The simulation results indicate that the droplet size is proportional to pressure and nozzle diameter, and inversely proportional to viscosity and surface tension of liquid. Along the spray axis, droplet velocity decreases acutely, and keeps steady at the downstream of 200 mm. Along the radial direction t The axial velocity of droplet in the center is lower than that on the edge, where the droplet size is maximum. Due to droplet collision and breakup, the droplet size decreases first, and then slowly increases. The simulation Te・ suits are in good agreement with experimental results.
Key words： pressure atomization;spray characteristics； semi-drying FGD； numerical simulation
哈尔滨工业大学学报
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY
哈尔滨工业大学学报
JOURNAL OF HARBIN INSTITUTE OF TECHNOLOGY
哈尔滨工业大学学报
JOURNAL OF HARBI