| 掺气对射流轴线速度衰减影响的试验研究(“研究生论坛”稿件) |
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| 引用本文： | 卫望汝.掺气对射流轴线速度衰减影响的试验研究(“研究生论坛”稿件)[J].四川大学学报(工程科学版),2011,43(Z1):29-33. |
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| 作者姓名： | 卫望汝 |
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| 作者单位： | 四川大学水力学与山区河流开发保护国家重点实验室 |
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| 摘 要： | 通过物理模型试验，采用CQY—Z8a型针式掺气流速仪测量了掺气射流的轴线速度，对不同条件下的掺气射流轴线速度衰减情况进行了对比研究，分析了入射水流速度、掺气浓度以及射流水股厚度对射流轴线速度衰减的影响，获得了掺气射流轴线速度衰减的变化规律。结果表明：在本试验条件下，射流轴线速度呈线性衰减；入射水流速度对射流轴线速度衰减基本没有影响，表现为不同入射水流速度时，各衰减趋势基本一致；掺气浓度越大，射流轴线速度衰减越快；射流水股厚度越小，射流轴线速度衰减越快。因此提高射流水体的掺气浓度，尽可能分散入水水体，可以加快射流轴线速度衰减，有效减弱射流对下游河床的冲刷。
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| 关 键 词： | 射流 掺气浓度 流速 |
| 收稿时间： | 2011/4/25 0:00:00 |
| 修稿时间： | 2011/4/25 0:00:00 |
Experimental Investigation on the Effects of aeration on the Velocity Attenuation of Jet Flow |
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| Wei Wang-Ru.Experimental Investigation on the Effects of aeration on the Velocity Attenuation of Jet Flow[J].Journal of Sichuan University (Engineering Science Edition),2011,43(Z1):29-33. |
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| Authors: | Wei Wang-Ru |
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| Affiliation: | WEI Wang-ru,DENG Jun,LIU Bin,ZHANG Ye-lin,QIAN Xiao-yan,LIU Xiao-jiang(State Key Lab.of Hydraulics and Mountain River Eng.,Sichuan Univ.,Chengdu 610065,China) |
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| Abstract: | Based on model experiment,the velocities of jet flow along axis were measured,using the CQY-Z8a velocimeter.The velocity attenuation of the jet flow along axis under different conditions was studied.The effects of aeration concentration,jet velocity at entry and thickness of jet flow on the velocity attenuation of jet flow were analyzed.The results showed that the velocity attenuation of jet flow along axis changed in laws.Under the experimental conditions,the velocity along axis decreased linearly.The high... |
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| Keywords: | jet flow aeration concentration velocity |
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