排灌机械工程学报
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排灌机械工程学报  2019, Vol. 37 Issue (3): 232-236    DOI: 10.3969/j.issn.1674-8530.18.0201
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新型多叶轮潜水搅拌机流场特性
田飞1,2,施卫东3*,张德胜4,曹卫东4,周琴2
1. 江苏大学能源与动力工程学院, 江苏 镇江 212013; 2. 亚太泵阀有限公司, 江苏 泰兴225400; 3. 南通大学机械工程学院, 江苏 南通 226019; 4. 江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江212013
Flow filed characteristics of new-type multi-impeller submersible mixer
TIAN Fei1,2, SHI Weidong3*, ZHANG Desheng4, CAO Weidong4, ZHOU Qin2
1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Yatai Pump &Valve Co. Ltd., Taixing, Jiangsu 225400, China; 3. School of Mechanical Enginee-ring, Nantong University, Nantong, Jiangsu 226019, China; 4. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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摘要 为提高搅拌机搅拌效果,针对各种形状的污水处理池,设计出系列新型多叶轮潜水搅拌机.文中基于ANSYS Fluent 15.0,对2种新型多叶轮潜水搅拌机搅拌流体进行计算,展开深入研究.结果表明:新型双向潜水搅拌机和新型双层潜水搅拌机搅拌水池内流体有效轴向推进距离分别是同叶轮的传统潜水搅拌机的2.0倍和1.8倍,池内流体平均流速分别为0.194 m/s和0.215 m/s,与传统潜水搅拌机搅拌流体平均速度0.203 m/s接近.新型双向潜水搅拌机池内最大速度沿轴向分布呈现马鞍形分布,且流体速度差较大,仅有73.2%流体的流速大于0.050 m/s,且低速区存在于水池中上部,其更适用于狭长且不深的水池.新型双层潜水搅拌机搅拌水池内流体最大速度分布沿轴向呈现双曲线递减分布,78.71%流体的流速在0.100~0.300 m/s,池内低速流体仅占1.55%.故新型双层潜水搅拌机和新型双向潜水搅拌机搅拌性能明显优于同叶轮的传统潜水搅拌机.研究结果可为潜水搅拌机的实际工程应用提供参考.
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田飞
施卫东*
张德胜
曹卫东
周琴
关键词潜水搅拌机   计算流体力学   流场特性   多叶轮     
Abstract: To improve the mixing effect of a submersible mixer, a series of new-type multi-impeller mixers were designed for sewage treatment pools in various shapes. Based on CFD software ANSYS Fluent 15.0, the flow field of two new-type multi-impeller submersible mixers was studied in this paper. The results show that the effective axial propulsion distances in the new-type two-way submersible mixer and the new-type two-impeller submersible mixer are 2 times and 1.8 times that of the traditional mixer, and the average velocities of the fluid in the pool are 0.194 m/s and 0.215 m/s, respectively, which are close to the average velocity of 0.203 m/s in the traditional mixer. The maximum velocity curve induced by the new two-way submersible mixer is saddle-shaped, and the velocity difference is greater, only 73.2% of the fluid in the pool is with a velocity higher than 0.050 m/s, and the low-velocity zone is in the middle and upper part of the pool. The maximum velocity curve generated by the new-type two-impeller submersible mixer is in a hyperbolic decreasing shape. 78.71% of the fluid in the pool is in a velocity between 0.100 and 0.300 m/s, and the low-velocity zone accounts for 1.55% of the water body in the pool. Thus, two new-type mixers designed are obviously better than the traditional mixer in performance. The results can provide a reference for practical engineering application of submersible mixers.
Key wordssubmersible mixer   CFD   flow filed characteristics   multi-impeller   
收稿日期: 2018-09-21;
基金资助:江苏省自然科学基金(青年基金)资助项目(BK20160521);江苏省博士后科研资助计划项目(2018K017A);六大人才高峰资助项目(JNHB-192);镇江市重点研发计划项目(SH2017049)
引用本文:   
田飞,,施卫东*等. 新型多叶轮潜水搅拌机流场特性[J]. 排灌机械工程学报, 2019, 37(3): 232-236.
TIAN Fei-,,SHI Wei-Dong-* et al. Flow filed characteristics of new-type multi-impeller submersible mixer[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(3): 232-236.
 
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