摘要
采用数值模拟方法对冲击水浴式洗涤净化过程中顶部浸没气体射流冲击液体的气液流动过程进行了研究。着重揭示了在气体射流冲击液体初始阶段的冲击行为过程,获得了最大冲击深度等表征冲击流动的参数及其变化规律。数值模拟得到了与实验相同的结论。数值研究发现:冲击凹坑的发展变化经历了凹坑形成、凹坑长大、凹坑膨胀停滞和凹坑上浮运动4个阶段;气体射流动量的大小是影响最大冲击深度的重要因素之一;在气体射流动量一定的情况下,最大冲击深度随着喷口尺寸的增加而减小;管口浸没深度对气体射流最大冲击深度的影响不大。
A Numerical simulation method was used to study the initial impact behavioral characteristics during top-submerged gas injection in the scrubbing process of impinging water bath. These studies revealed the fine development of the gas-liquid flow and the change law of the maximum impact depth. The calculation Results are in accordance with the experimental results in the literature. The results show that the impinging dent ~s the development experiences four stages： dent forming, dent growing, dent growing stagnation and dent motion. The gas momentum is one of key factors which influence maximum impact depth. When the gas momentum was decided, the maximum impact depth decreased with increase of the nozzle size. The submerged depth of nozzle has little effect on the maximum impact depth.
出处
《锅炉技术》
北大核心
2013年第3期1-5,共5页
Boiler Technology
基金
国家自然科学基金资助项目(51166010)
内蒙古科技大学创新基金资助项目(2011NCL020)
关键词
冲击水浴
顶部浸没气体射流
冲击深度
数值模拟
impinging water bath
top-submerged gas injection
impact depth
numerical simulation
