[1]周涛,孙建红,孙智,等.螺旋曝气特性与流场分析[J].东南大学学报(自然科学版),2016,46(5):1038-1044.[doi:10.3969/j.issn.1001-0505.2016.05.024]
 Zhou Tao,Sun Jianghong,Sun Zhi,et al.Performance and flow analysis of spiral aeration[J].Journal of Southeast University (Natural Science Edition),2016,46(5):1038-1044.[doi:10.3969/j.issn.1001-0505.2016.05.024]
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螺旋曝气特性与流场分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第5期
页码:
1038-1044
栏目:
机械工程
出版日期:
2016-09-20

文章信息/Info

Title:
Performance and flow analysis of spiral aeration
作者:
周涛孙建红孙智刘可
南京航空航天大学航空宇航学院, 南京 210016
Author(s):
Zhou Tao Sun Jianghong Sun Zhi Liu Ke
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
关键词:
螺旋曝气法 螺旋曝气池 混合效率 气含率
Keywords:
spiral aerating method spiral aeration tank mixing efficiency gas holdup
分类号:
TH17;V240.2
DOI:
10.3969/j.issn.1001-0505.2016.05.024
摘要:
为了提高曝气效率,提出了一种具有螺旋流场特性的新型曝气方式.通过对螺旋曝气进行理论分析发现,该方法可以提高气-液两相的总接触面积,进而增强曝气效率.同时采用Euler-Euler双流体模型对螺旋曝气池流场进行了数值模拟,并与传统曝气方式(垂直曝气和水平曝气)进行对比分析.工程实例分析结果表明,当曝气总流量为7.48 kg/s时,螺旋曝气池全流域平均混合效率约为垂直曝气池的23倍,且为水平曝气池的10倍.此外,对螺旋曝气池中涡运动和湍流脉动等流动机理进行分析以及对气含率分布的考察发现,螺旋曝气中的气羽柱前行路径成螺旋状,涡运动和湍流脉动增强,使得气-液总接触面积增大,流场更均匀,曝气效率更高.
Abstract:
To improve the efficiency in mass transfer of oxygen, a novel aeration method with spiral flow field characteristics was presented. By making theoretical analysis on the spiral aeration, we find that the total contact area of gas-liquid two-phase is increased and the aeration efficiency is improved. Based on its principle analyses, a numerical calculation of spiral aeration tank flow field was carried out by using Euler-Euler two-fluid model, and compared with that of traditional aeration tank(vertical and horizontal aeration tanks). Comparing results show that the average mixing efficiency of a spiral aeration tank is about 23 times of a vertical aeration tank, and 10 times of a horizontal aeration tank. On the other hand, the analyses turn out that in a spiral aeration tank the path of the gas is helix, the vortex motion is stronger, the length of the path is longer, the total contact area is larger and the aeration efficiency is higher. The distributions of flow field and gas holdup are more uniform in spiral aeration method.

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备注/Memo

备注/Memo:
收稿日期: 2016-04-02.
作者简介: 周涛(1982—),男,博士生;孙建红(联系人),男,教授,博士生导师,jhsun@nuaa.edu.cn.
基金项目: 国家自然科学基金资助项目(21407077)、江苏省“六大人才高峰”资助项目(2012-JNHB-014)、江苏高校优势学科建设工程资助项目.
引用本文: 周涛,孙建红,孙智,等.螺旋曝气特性与流场分析[J].东南大学学报(自然科学版),2016,46(5):1038-1044. DOI:10.3969/j.issn.1001-0505.2016.05.024.
更新日期/Last Update: 2016-09-20