矿井排风热回收上喷淋液滴运动模型及其优化  

Motion model and optimization calculation of droplet in up-jet spraying heat exchanger attached to mine fan diffuser

作　　者：崔海蛟[1] 王海桥[1,2] 陈世强[1,2] 赵杰 贾腾[1] 章晓伟[1] 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201 [2]湖南省矿山通风与除尘装备工程技术研究中心,湖南湘潭411201

出　　处：《黑龙江科技学院学报》2014年第1期24-29,共6页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家自然科学基金和上海宝钢集团公司联合项目(51074073);湖南省自然科学基金项目(13JJ6057);煤矿安全开采技术湖南省重点实验室(湖南科技大学)开放基金项目(201105);湖南科技大学研究生优秀学位论文培育项目(SNY005)

摘　　要：为了减小矿井排风热回收装置的水损失量,设计了上喷式矿井排风热回收装置。通过液滴受力及运动分析,计算了不同迎面风速u_a下液滴不被吹飞的临界直径,以及不同迎面风速、液滴粒径d与液滴初速度u_d下,液滴最大上升高度。当u_d<2u_a时,液滴最大上升高度主要由液滴初速度决定,迎面风速次之,液滴粒径影响很小;当u_d>3u_a时,液滴最大上升高度由液滴粒径、液滴初速度、迎面风速共同决定。This paper is an effort to reduce the amount of water loss occurring in a spray heat exchanger attached to a mine fan diffuser by designing an up-jet spraying heat exchanger.This design is performed by analyzing the way droplets are subjected to forces and motion,calculating the critical diameters able to prevent the droplets from being blown away,when exposed to different headwind velocities,and numerically calculating the maximum height at which the droplets rise,when subjected to different headwind velocities,droplet diameters,and different initial droplet velocities.The calculation suggests that in the case of ud ＜ 2ua,the maximum rise height of droplets h is determined by a decreasing degree from ud,to ua,and the droplet diameter d; in the case of ua ＞3ua,h is jointly determined by ud,ua,and d.

关 键 词：矿井排风热回收 上喷式喷淋换热 液滴受力 液滴最大上升高度 

分 类 号：TD724[矿业工程—矿井通风与安全] TU834[建筑科学—供热、供燃气、通风及空调工程]