Stereoscopic PIV measurement of 3-dimensional flow field in carrousel oxidation ditch reactor model

被引：0

作者：

Key Lab. for Resource Exploitation and Environmental Disaster Control Engineering in Southwest China, Department of Environmental Science, Chongqing University, Chongqing 400030, China ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

机构：

来源：

Yingyong Lixue Xuebao | 2008年 / 3卷 / 387-391期

关键词：

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Stereoscopic PIV (Particle Image Velocimetry) was applied to investigate the 3-dimensional whole-flow-field velocity in straight channel, flexural channel and impeller section of Carrousel oxidation ditch reactor. Flow structures in different ditches are analyzed and the distribution characters of longitudinal, lateral, vertical velocity along the course of the reactor are compared and discussed. The result shows that longitudinal and vertical flows are the determinative factors of hydraulic characteristic in the reactor. The position of sludge sedimentation primarily depends on lateral and vertical velocity. In the outside ditch near the impeller, the flow rate at the upper part is greater than that at the lower part, which leads to a sludge sedimentation in low speed section. In the outside ditch far away from the impeller, the flow rate at the upper part is lower than that at the lower part, which gets benefit to prevent the sludge separation from wastewater. Because of effects of the lateral slope and its circulation flow in the flexural section, the low speed flow and/or stagnancy tends to occur easily in the inboard section. The cone impeller makes spiraling flow in vertical direction, to facilitate mixing gas, liquid and solid.

引用