高校化学工程学报Issue(4)：585-590,6.DOI:10.3969/j.issn.1003-9015.2013.07.09.04
双层涡轮桨偏心搅拌槽内的宏观不稳定性研究
Study on the Macro-Instability in a Stirred Tank Equipped with Double Eccentrically Located Rushton Impellers
摘要
Abstract
The macro-instabilities (MI) in a stirred tank equipped with double eccentrically located Rushton impellers were studied by using detached eddy simulation (DES) model and PIV experimental method. By the transient simulation of the flow field, a frequency analysis was applied to the obtained time series of the velocity component. Effects of the impeller installation method and rotation direction on the MI frequency were discussed and compared with that of the single-shaft single-impeller eccentric agitation. Results show that the MI frequency of double-impeller eccentric agitation is smaller than that of the single-impeller eccentric agitation. The impeller installation method and rotation direction have obvious influence on the MI frequency of the double-impeller eccentric agitation. When the impellers are mounted on two different shafts, the MI frequency is a little larger. If the two impellers rotate in opposite directions, the frequency is larger than that of the co-rotating mode, i.e., rotate in the same direction.关键词
双层桨偏心搅拌/宏观不稳定性/频谱分析/分离涡模拟/粒子图像测速Key words
double-impeller eccentric agitation/macro-instability (MI)/frequency analysis分类
化学化工引用本文复制引用
杨锋苓,周慎杰,王贵超..双层涡轮桨偏心搅拌槽内的宏观不稳定性研究[J].高校化学工程学报,2013,(4):585-590,6.基金项目
山东大学自主创新基金(2010GN052) （2010GN052）
山东省科技攻关项目基金(2009GG10007019)。 （2009GG10007019）
