文献类型：期刊文献

英文题名：Comparing the performances of circular ponds with different impellers by CFD simulation and microalgae culture experiments

作者：Meng, Chen[1];Huang, Jianke[2];Ye, Chunyu[1];Cheng, Wenchao[1];Chen, Jianpei[1];Li, Yuanguang[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：38

期号：7

起止页码：1347

外文期刊名：BIOPROCESS AND BIOSYSTEMS ENGINEERING

收录：;EI(收录号：20150800550193);WOS:【SCI-EXPANDED(收录号:WOS:000355940900012)】；

基金：This research was funded by National Basic Research Program China (973 Program: 2011CB200903).

语种：英文

外文关键词：Circular pond; Computational fluid dynamics; Particle image velocimetry; Flow hydrodynamics; Optimal mixing system; Microalgae cultivation

摘要：In this study, a numerical simulation using computational fluid dynamics (CFD) was used to investigate the hydrodynamic characteristics of circular ponds with three different impellers (hydrofoil, four-pitched-blade turbine, and grid plate). The reliability of the CFD model was validated by particle image velocimetry (PIV). Hydrodynamic analyses were conducted to evaluate the average velocity magnitude along the light direction (U (z)), turbulence properties, average shear stress, pressure loss and the volume percentage of dead zone inside circular ponds. The simulation results showed that U (z) value of hydrofoil was 58.9, 40.3, and 28.8 % higher than those of grid plate with single arm, grid plate with double arms and four-pitched blade turbines in small-scale circular ponds, respectively. In addition, hydrofoil impeller with down-flow operation had outstanding mixing characteristics. Lastly, the results of Chlorella pyrenoidosa cultivation experiments indicated that the biomass concentration of hydrofoil impeller with down-flow operation was 65.2 and 88.8 % higher than those of grid plate with double arms and four-pitched-blade turbine, respectively. Therefore, the optimal circular pond mixing system for microalgae cultivation involved a hydrofoil impeller with down-flow operation.