弯道流水域热浮力排放扩散器参数优化物理模型试验研究

发布时间：2018-06-25 23:23

本文选题：PLIF + 液态流出物　；参考：《中国水利水电科学研究院学报》2017年02期

【摘要】：弯道河流水域排放口布置常选择在弯道凹岸侧,以充分利用弯道环流加快稀释,然而弯道环流条件下排放口近区稀释特性与均匀流条件下存在较大差异,相关研究较少。本文在大比例尺物理模型试验中模拟复杂地形和弯道流动条件下扩散器热浮力排放近区稀释规律,采用平面激光诱导荧光(Planar Laser Induced Fluorescence,PLIF)技术进行断面浓度测量,分析了弯道环流对近区浮射流稀释扩散的影响,对扩散器出流仰角、出流水平方位角和离岸距离等进行了优化,在此基础上提出了适用于弯道水域地形条件热浮力排放的近水平非等高多喷口离岸向排放型式。研究结果对于类似弯道水域热浮力排放扩散器优化研究具有参考意义。
[Abstract]:In order to make full use of the curve circulation to accelerate dilution, the discharge outlet layout of the bend river is usually selected in the concave bank of the bend, but the dilution characteristics in the near region of the discharge outlet under the curve circulation condition are different from those in the uniform flow condition, and there are few related studies. In this paper, the near region dilution law of diffuser thermal buoyancy emission is simulated in large scale physical model test under complex terrain and curved flow conditions. Plane Laser induced fluorescence (Planar Laser induced fluorescence) technique is used to measure the cross section concentration. The influence of curved circulation on dilution and diffusion of floating jet is analyzed, and the elevation angle, horizontal azimuth angle and offshore distance of diffuser are optimized. Based on this, a near level non equal high nozzle offshore discharge pattern suitable for thermal buoyancy discharge in curved waters is proposed. The results are useful for the optimization of thermal buoyancy diffuser in similar curved waters.
【作者单位】：中国水利水电科学研究院水力学研究所;
【基金】：国家自然科学基金项目(51209228)
【分类号】：TV131.61

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