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Investigation on the flow characteristics of a novel multi-blade combined agitator by time-resolved PIV and LES
  • Yan Xu,
  • Bin Wu,
  • Peicheng Luo
Yan Xu
Southeast University
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Bin Wu
Southeast University
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Peicheng Luo
Southeast University
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Abstract

We investigated the flow characteristics in a tank of H/T=1.5 stirred by a novel multi-blade combined agitator (MBC) by using time-resolved PIV and LES approach. The predictions were assessed by Y+ values and power spectrum analysis, as well as experimental validation of velocity distributions. Results demonstrate that the MBC agitator can load the energy into the system effectively with a power number of 12.5 in a turbulent regime, resulting in improved axial and radial mass exchange. The upper and lower short blades produce an axial down-flow in the top half and an axial up-flow in the bottom half, respectively. Part of axial flows change to radial flows by the radial pumping of the long blades, meanwhile, the impingement of two axial flows improves the axial mass exchange. These flow characteristics leads to an obvious improvement in the turbulent kinetic energy distribution uniformity.

Peer review status:ACCEPTED

16 Jan 2020Submitted to AIChE Journal
16 Jan 2020Submission Checks Completed
16 Jan 2020Assigned to Editor
27 Jan 2020Reviewer(s) Assigned
04 Mar 2020Editorial Decision: Revise Major
17 Apr 20201st Revision Received
23 Apr 2020Submission Checks Completed
23 Apr 2020Assigned to Editor
27 Apr 2020Reviewer(s) Assigned
18 May 2020Editorial Decision: Accept