喷嘴组的雾化特性及液滴直径分布影响因素研究  

Influencing Factors of Atomization Characteristics and Droplet Diameter Distribution of Nozzle Groups

作　　者：吴正人[1] 吴启东 肖华[2] 杨小娜[2] 李艳彤[2] WU Zhengren;WU Qidong;XIAO Hua;YANG Xiaona;LI Yantong(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei,China;Baoding Cigarette Factory of Hebei Baisha Tobacco Co.,Ltd.,Baoding 071000,Hebei,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [2]河北白沙烟草有限责任公司保定卷烟厂,河北保定071000

出　　处：《济南大学学报（自然科学版）》2022年第6期741-747,共7页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(12172129);河北中烟工业有限责任公司重点项目(HBZY2021A005)。

摘　　要：以喷嘴组的雾化过程为研究对象,通过构建基于离散相模型离散态方法的数值模型,开展不同工况下的喷嘴组雾化过程的数值模拟,研究不同喷嘴压力、倾角与喷嘴间距对喷嘴雾化的空气动力特性的影响规律。结果表明:喷嘴压力越大,不同喷嘴组的计算域内液滴直径越小,液滴停留时间和液滴数量呈减少趋势;随着倾角的增大,喷嘴干涉区域的液滴数量比未干涉区域的多,内侧液滴在计算域中停留时间比外侧的更长,当倾角为15°时液滴直径分布最均匀;随着喷嘴间距的增加,液滴直径分布向中间峰值方向聚集,数量分数增大,喷嘴间干涉作用减弱,喷嘴锥面交接处液滴数量较多。Taking atomization processes of nozzle groups as research objects and constructing a numerical model based on discrete phase model discrete state method, numerical simulation of nozzle group atomization under different working conditions was explored. Effect of different nozzle pressure, tilt angle, and nozzle distance on aerodynamic characteristics of nozzle atomization was researched. The results show that the greater the nozzle pressure is, the smaller the droplet diameter in calculation domains of different nozzle groups is, and the residence time and the droplet number decrease. With the increase of the tilt angle, the droplet number in the interference area of nozzle is larger than that in the non-interference area, and the droplets on the inside of spray stay longer in the calculation domain than those on the outside of spray. The droplet diameter distribution is the most uniform when the tilt angle is 15 °. When the nozzle distance increases, the distribution of droplet diameter converges towards the middle peak direction. The number proportion tends to increase, the interference between nozzles weakens, and the droplet number is larger at the conical junction of nozzles.

关 键 词：雾化 喷嘴压力 倾角 喷嘴间距 空气动力特性 

分 类 号：O351[理学—流体力学]