%A ZHU Rong-Sheng, LI Xiao-Long, SHI Wei-Dong, LIU Ling-Ling, WANG Tao %T simulation and experimental study on submersible selfª²aspirating aerator %0 Journal Article %D 2013 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2013.01.011 %P 50-55 %V 31 %N 1 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_493.shtml} %8 2013-01-25 %X An openª²style impeller with radial blades and an openª²type diffuser were designed according to the performance specifications of a submersible selfª²aspirating aerator to investigate the fluid flow in the aerator, and their threeª²dimensional models have been generated in CAD codeª²UG. The turbulent flow through the aerator was simulated by means of CFD softwareª²Ansysª²CFX with a multipleª²phase turbulence flow models, and the simulated results were analyzed and confirmed by related experimental observations. The simulated results showed that when the submersed depth of the aerator was increased to 6.5 m from 2.5 m, the flow patterns in the aerator experienced three changes, such as chaos, smooth and chaos again, accordingly the lowest pressure zone appeared, disappeared and reappeared as well. The experimental data exhibited that when the submersed depth of the aerator was increased to 6.5 m from 2.5 m, the air in the suction pipe got the highest velocity of 4.25 m/s at the 3.5m submersed depth. A similar air velocity in the suction pipe was achieved too. This suggests that predicting performance of aerator by means of CFD method is feasible.