[1]彭正标,梁坤峰,袁竹林.液-液循环流化床制取流体冰雾化机理实验[J].东南大学学报(自然科学版),2007,37(3):457-463.[doi:10.3969/j.issn.1001-0505.2007.03.021]
 Peng Zhengbiao,Liang Kunfeng,Yuan Zhulin.Experimental study on mechanism of drops formation in liquid-liquid circulating fluidized bed for ice slurry production[J].Journal of Southeast University (Natural Science Edition),2007,37(3):457-463.[doi:10.3969/j.issn.1001-0505.2007.03.021]
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液-液循环流化床制取流体冰雾化机理实验()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第3期
页码:
457-463
栏目:
化学化工
出版日期:
2007-05-20

文章信息/Info

Title:
Experimental study on mechanism of drops formation in liquid-liquid circulating fluidized bed for ice slurry production
作者:
彭正标 梁坤峰 袁竹林
东南大学能源与环境学院, 南京 210096
Author(s):
Peng Zhengbiao Liang Kunfeng Yuan Zhulin
School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
液-液循环流化床 雾化 射锥高度 Rosin-Rammler分布函数 粒径分布
Keywords:
liquid-liquid circulating fluidized bed drops formation jet length Rosin-Rammler distribution function drop-size distribution
分类号:
TQ027.35
DOI:
10.3969/j.issn.1001-0505.2007.03.021
摘要:
对液-液系统射流雾化机理进行了实验研究.通过改变水的喷射速度和非相溶介质的流速,来研究不同条件对雾化的影响,利用高速摄像仪捕捉各种工况下的雾化结果.采用图像处理与数值计算相结合的方法对雾化结果进行了统计整理,对雾化过程中影响雾化液滴平均粒径、射锥高度以及雾化现象的关键因素进行了探讨,并应用Rosin-Rammler分布函数对液滴粒径分布进行了分析.结果表明:每种工况下的雾化液滴粒径存在着离散性,能很好地符合Rosin-Rammler分布规律; 当非相溶介质流速保持不变时,雾化液滴统计平均粒径与射锥高度分别在喷射速度为2.3与 3.5 m/s时,达到最大值; 而在相同的喷射速度下,改变非相溶介质流速所得雾化结果也完全不同.喷射速度以及周围非相溶介质的流速是影响雾化结果的重要因素,合理选择其值对优化雾化性能及控制雾化过程有着重要的意义.
Abstract:
The mechanism of jet breakup and subsequent drops formation was studied experimentally. A high-speed CCD(charge coupled device)camera was employed to acquire in real-time the process of drops formation. Crucial factors that strongly influence the mean drop-size, jet length and the appearance of drops formation were investigated systematically by means of image processing and numerical calculation. Further, the Rosin-Rammler function was applied to analyze the drop-size distribution. Final results show that the drop-size distributes non-uniformly even under the same condition and agrees relatively well with the Rosin-Rammler distribution function. When the flow rate of the ambient immiscible liquid maintains invariable, the mean drop-size and the jet length reach the maximum respectively at the jetting-velocity of 2.3 m/s and 3.5 m/s. However, for a constant jetting-velocity, the process of drops formation appears completely different as the flow rate of the immiscible liquid changes. The process of drops formation rests seriously with the jetting-velocity and the flow rate of the immiscible liquid, and the values specified for them play a key role in optimization and control of drops formation.

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备注/Memo

备注/Memo:
基金项目: 教育部高等学校博士点专项科研基金资助项目(20060286034).
作者简介: 彭正标(1981—),男,博士生,znbiu@sina.com; 袁竹林(联系人),男,博士,教授,博士生导师,zhulinyuan@seu.edu.cn.
更新日期/Last Update: 2007-05-20