| 李琳,杨海华,王苗,邱秀云.梭锥管混浊流体分离装置流场PIV 测试及分析[J].水利学报,2013,44(9): |
| 梭锥管混浊流体分离装置流场PIV 测试及分析 |
| Test and analysis on flow field in the shuttle-conical tube turbid flow hydraulic separation Device by PIV techniques |
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| DOI： |
| 中文关键词: 水沙两相流 水力分离 PIV技术 流场 |
| 英文关键词: water & sediment two-phase flow hydraulic turbid water separation device PIV flow field |
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| 中文摘要: |
| 利用粒子图像测速技术，测试了两种工况下梭锥管混浊流体分离装置（简称梭锥管）内的水沙两相流的速度场，给出了梭锥管内泥沙运动的流速矢量分布及流速大小云图。对测试结果的分析表明，实测结果与理论分析结果一致。含沙水流进入梭锥管后，其内设置的多层锥圈把泥沙沉降区域分割成若干个沉降距离较短且相互独立的沉降空间，缩短了泥沙的自由沉降距离。相邻锥圈组成的水沙分离空间内，形成了沿锥圈上表面向下运动的泥沙流和沿锥圈下表面向上运动的清水流，使分离后的泥沙流和清水流沿各自独立路径流动，泥沙流流入排沙装置中心的排沙通道，而清水流流入装置边壁处的清水流通道，相互之间无混掺和干扰，加快了水沙分离速度。 |
| 英文摘要: |
| Particle image uelocimotrg （PIV） was used to test the water and sediment flow velocity field in the Shuttle-conical Tube Turbid Flow hydraulic separation Device （SCT） with two cases. The distributions
of sediment flow velocity vector and the velocity diagram at various planes in different locations of the SCT have been offered. The results indicate that the test results are consistent with the physical experimental phenomenon and theoretical analysis. The SCT is divided into many sedimentation spaces by multilayer cone rings so that the sedimentation distance of SCT is shorter than the common device without any cone ring and all the sedimentation spaces are independent from each other. The turbid flow with suspension flow into the SCT， and sediment free settlement distance has been shortened， and in the water-sediment
separation space composed by adjacent two cone rings，the sediment flow is downward along the upper surface of one cone ring， and the clear water flow is upward along the lower surface of the other cone ring.
Then the water and sediment flow respectively along different path， the former flows into the clear water passage arranged at the sides of the wall，and the latter flows into the sand drainage channel at the center
of the SCT. In the process of the separation and drainage， the clear water doesn’t mix and interfere with sediment flow so that the separation efficiency of water & sediment by the SCT has been improved. |
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