| 掺气减蚀挑跌坎与水流紊动特性 |
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| 引用本文： | 罗铭. 掺气减蚀挑跌坎与水流紊动特性[J]. 水利学报, 1995, 0(7): 1-7 |
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| 作者姓名： | 罗铭 |
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| 作者单位： | 成都科技大学高速水力学研究室 |
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| 基金项目： | 85－208－01－04－19项目 |
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| 摘 要： | 本文应用二维激光测速装置测量孔口后明槽水流紊动特性（时均流速、纵向垂向脉动流速强度分布）及掺气减蚀挑跌坎对其产生的影响程度和范围。明槽水流趋于稳定断面的平均相对纵向脉动流速强度σ↑－ｘ／ｕ↑－ｘ为０．０７，相对垂向脉动流速强度σ↑－ｙ／ｕ↑－ｘ约０．０３４，与其他条件下的测量结果一致；掺气减蚀设施会使时均流速减小，而纵向脉动流速强度和垂向脉动流速强度则会明显增强。但掺气设施对水流紊动特性的影响是沿
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| 关 键 词： | 明流 掺气设施 水流紊动 激光测速器 挑跌坎 |
Relationship between the aerator and the characteristics of turbulent |
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| Luo Ming. Relationship between the aerator and the characteristics of turbulent[J]. Journal of Hydraulic Engineering, 1995, 0(7): 1-7 |
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| Authors: | Luo Ming |
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| Affiliation: | Chengdu University of Science and Technology |
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| Abstract: | The turbulent characteristics of the jet flow in open channel, including themean velocity distribution, longitudinal and vertical turbulent strengthdistribution, are investigated by using a 2-D laser Doppler velocimeter. The relative mean longitudinal and vertical turbulent strength in the cross section are 0.07 and 0.034 respectively if there is no aerator at the bottom. In case an aerator is in existence, the mean velocity will be reduced by 10-30%, and will be enhanced by 400%, but the mean turbulent strength decaysrapidly within a range of (3.5-4.5)H'. |
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| Keywords: | channel flow aerator stucture of turbulent flow laser dopplervelocimeter. |
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