新型搪玻璃搅拌桨搅拌特性数值模拟及实验研究.pdf

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CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2013年第32卷第9期
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新型搪玻璃搅拌桨搅拌特性数值模拟及实验硏究
李岩,刘雪东,钱建峰2
(常州大学机械工程学院,江苏常州213016:2苏州市协力化工设备有限公司,江苏苏州215137
摘要:采用CFD方法模拟了具有相同桨径、不同桨叶折角和叶宽结构的6种新型搪玻璃搅拌桨的揽拌特性。
考察了挡板、桨叶离底高度对釜内流场的影响,基于此分析了桨叶折角、叶宽对速度分布的影响。对模拟得到
的搅拌功率和混合时间进行了实验验证,并与传统塘玻璃桨式搅拌器进行比较。结果表明:①新型桨叶在加挡
板且桨叶离底高度为450mm时,搅拌效果最佳;②随桨叶折角、叶宽的増大,桨叶区轴向、径向和切白速度均
呈增大趋势,当桨叶折角为45°、叶宽为95mm时,釜内混合效果最好;③随转速增大,搅拌功率呈增大趋势
混合时间呈减小趋势,新型桨明显比传统桨混合性能好,桨叶折角为30°、叶宽95mm时功率消耗最低,桨叶
折角为35°、叶宽95mm时混合时间最短
关键词:搪玻璃;搅拌桨;搅拌特性;数值模拟
中图分类号:TQ027.1:TQ051.7
文献标志码:A
文章编号:1000-6613(2013)09-2056-05
DOI:10.39695-iSsn.10006613.2013.09.009
Numerical simulation and experimental investigation on mixing
haracteristics of new type of glass-lined agitators
LI Yan, LIU Xaedong', OIAN Jianfeng
(School of Mechanical Engineering, Changzhou University, Changzhou 213016, Jiangsu, China; Suzhou Xieli
Chemical Equipment Co, Ltd, Suzhou 215137, Jiangsu, China
Abstract: This paper used CFD as the simulation method in the investigation of the mixing
characteristics of six new types of glass-lined agitators, with the same diameter and different blade
angles and blade widths. This research analyzed the effects of baffle and impeller ofr-bottom-distance
on the fluid flow field, and the effects of blade angle and blade width on velocity field. The
experimental results of stirring power and mixing time agreed well with the simulation. Comparison
with traditional glass-lined pitch blade agitator was also investigated. The results showed that the
following: Othe stirring effect was optimal with added baffle and the impeller off-bottom-distance
was 450 mm; ()When blade angle and width increased, axial, radial and tangential velocities increased
accordingly, and the mixing effect was optimal when the blade width was95 mm and blade angle was
45; (3When the rotational speed increased, the stirring power increased and mixing time
decreased The power consumption was lowest when the blade width was 95 mm and blade angle was
30; the mixing time was shortest when the blade width was 95 mm and blade angle was 35. The
mixing characteristics of new type of impellers were better than the traditional impellers
Key words: glass-lined; impeller; mixing characteristics; numerical simulation
搪玻璃设备的制备是选用高含硅量的塘玻璃收稿日期:20130309:修改稿日:20130406
釉料施涂在经过特殊处理的金属表面,通过900℃第一作者:李岩(1986-),女,硕北研究生,主要从事过程装备结构
左右高温多次煅烧,使釉料密着于金属基材表面,
完整性方面研究。-mailliyan861020163.com。联系入:刘雪东,教
与金属紧密结合,因此具有良好的耐腐蚀性和金属1dD备结构完整性、流体技术及应用等方面研究。Emi
授,从事过程