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- Title
Experimental Investigation of Flow Dynamics in Stirred Tank with Two-Pitched Blade- Frame Type Combined Impellers.
- Authors
GAO Xiaobin; BAO Jian; LIU Longwei; YANG Qizhou; ZHOU Yongjun
- Abstract
In order to efficiently apply two-pitched blade-frame type combined impellers in practical engineering, the flow characteristics of glycerol-water solution of different mass fractions in the stirred tank with improved frame type combined impellers were experimentally studied by using particle image velocimetry (PIV) . The effects on the flow field arising from the distance between two impellers, the diameter of the top impeller as well as the viscosity of stirring medium were investigated. The experimental results show that the circulating effect of fluid between two blades increases first and then decreases with the increase of the impeller spacing. When the impeller spacing C2 = 0.52H, the two blades cooperated best. The two vortexes of converging capacity are formed when the top impeller diameter D1 = 250 mm, and the overall mixing of the fluid in the tank is better. With the increase of the viscosity, the disturbance between the two blades increases, and the velocity distribution in the whole stirred tank becomes more uniform, suggesting that the improved frame type combination impeller is more suitable for solutions with higher viscosity. The research results provide a reference for the application of the two-pitched blade-frame type combined impellers in polyester synthetic industry practical engineering.
- Subjects
PARTICLE image velocimetry; IMPELLERS; POLYESTER industry
- Publication
Light Industry Machinery, 2023, Vol 41, Issue 5, p38
- ISSN
1005-2895
- Publication type
Article
- DOI
10.3969/j.issn.1005-2895.2023.05.006