标题：Investigation on laminar flow field performance in a stirred tank with different dual-impeller combinations
作者：Luan, De-Yu ;Zhou, Shen-Jie ;Chen, Song-Ying
作者机构：[Luan, De-Yu ;Zhou, Shen-Jie ;Chen, Song-Ying ] School of Mechanical Engineering, Shandong University, Jinan 250061, China;[Luan, De-Yu ] School of Me 更多
来源：Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
关键词：Dual-impeller; Laminar model; Layer clearance; Numerical simulation; Stirred tank
摘要：The 3D flow field generated by dual-impeller combination for the agitation of glycerin fluid was simulated using the commercial CFD package. The laminar and a multiple reference frame (MRF) approach was used in the discretized equations of motion. The velocity profiles predicted by the simulations with four combinations of impeller rotating at constant speed of 200 r/min and at different layer clearances were obtained. It was found that the velocity distributions of the dual 6-bladed radial disc turbines (2-6DT) which got the laminar flow were the best when the clearance was equal to or more than T/2, Moreover, when the clearance was smaller than or equal to T/3, there were more advantages for 6-bladed radial disc turbines and pitch 4-bladed turbines (6DT+PTB) which got connected flow than other combinations.