| 排放角度对波浪环境中圆管射流运动和稀释特性的影响 |
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| 引用本文： | 陈永平,孙朴,王娅娜,徐振山,江东勃,张玉玲.排放角度对波浪环境中圆管射流运动和稀释特性的影响[J].水科学进展,2017,28(6):898-907. |
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| 作者姓名： | 陈永平 孙朴 王娅娜 徐振山 江东勃 张玉玲 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏 南京 210098; |
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| 基金项目： | 国家自然科学基金资助项目（51509080；51379072） |
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| 摘 要： | 采用粒子图像测速和平面激光诱导荧光技术对波浪环境中倾斜射流的运动和稀释特性进行了实验研究，对比分析了排放角度对射流瞬时运动形态、时均速度场和时均浓度场的影响。实验结果表明排放角度的变化对波浪环境中射流的运动形态、速度分布和混合范围等均有显著影响。当射流顺波浪方向运动时，射流主体段速度剖面呈双峰分布，达到初始浓度20%、30%、40%和50%的混合范围随排放角度增加而先增大后减小；当射流逆波浪方向运动时，射流速度剖面双峰分布不明显，相应的混合范围随排放角度增加而减小。在波浪牵引和射流卷吸的共同作用下，逆向射流的稀释效果总体上优于与垂线方向相同夹角的顺向射流。
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| 关 键 词： | 倾斜射流 波浪环境 排放角度 时均速度 时均浓度 |
| 收稿时间： | 2017-05-05 |
Effects of discharge angles on hydrodynamics and dilution of round jets in wave environment |
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| CHEN Yongping,SUN Pu,WANG Yana,XU Zhenshan,JIANG Dongbo,ZHANG Yuling.Effects of discharge angles on hydrodynamics and dilution of round jets in wave environment[J].Advances in Water Science,2017,28(6):898-907. |
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| Authors: | CHEN Yongping SUN Pu WANG Yana XU Zhenshan JIANG Dongbo ZHANG Yuling |
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| Institution: | 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2.College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;3.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | An experimental study was carried out on the round jet flow at different inclination angles in wave environment by using particle image velocity measurement and plane laser induced fluorescence techniques, comparing and analyzing the impact of discharge angles on instantaneous flow pattern, mean velocity field and mean concentration field of jet flow. The experimental result shows that changes in discharge angle have significant impacts on flow pattern, velocity distribution and mixing range of jet flow in wave environment. When the jet flow moves in the wave direction, the velocity profile of jet dominant region presents bimodal distribution, and the mixing range increases with the increase of discharge angle and then decreases when initial concentrations of 20%, 30%, 40% and 50% are reached. When the jet flow moves in the reverse wave direction, the jet flow velocity profile presents bimodal distribution which is not obvious, and the corresponding mixing range decreases with the increase of discharge angle. Under the combined action of wave traction and jet flow entrainment, the dilution effect of reverse jet flow is generally better than forward jet flow at the same angle between vertical line. |
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| Keywords: | inclined jets wave environment discharge angles time-averaged velocity time-averaged concentration |
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