| 规则波和不规则波条件下射流实验对比 |
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| 引用本文： | 徐振山,陈永平,张长宽,王娅娜.规则波和不规则波条件下射流实验对比[J].水科学进展,2013,24(5):715-721. |
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| 作者姓名： | 徐振山 陈永平 张长宽 王娅娜 |
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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： | 水文水资源与水利工程科学国家重点实验室基本科研业务费资助项目(2011585812);河海大学中央高校基本科研业务费资助项目(2011B05614) |
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| 摘 要： | 利用三维声学多普勒流速仪分别对规则波和不规则波条件下垂向圆管射流的流场进行了测量。在规则波条件下,靠近自由表面的射流垂向速度横剖面出现了较为明显的"双峰"现象,相较而言不规则波条件下射流垂向速度横剖面保持更好的高斯分布,"双峰"现象更不明显。在波能密度和波能通量一致的比选原则下,射流在规则波条件下的轴线速度衰减在初始段较不规则波条件要快一些,这与上述 "双峰"现象存在一定的关系。
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| 关 键 词： | 射流 规则波 不规则波 实验 |
| 收稿时间： | 2012-10-10 |
Experimental study on the turbulent jet in regular and random waves |
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| XU Zhenshan,CHEN Yongping,ZHANG Changkuan,WANG Yana.Experimental study on the turbulent jet in regular and random waves[J].Advances in Water Science,2013,24(5):715-721. |
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| Authors: | XU Zhenshan CHEN Yongping ZHANG Changkuan WANG Yana |
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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 |
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| Abstract: | The flow fields of a vertical round jet in regular and random waves are measured by a 3-D Acoustic-Doppler Velocimeter. The phenomenon of "twin peaks" is found on the cross-sections of the jet vertical velocity in regular waves when close to the free surface, but it is less obvious on the cross-sections of the jet in random waves. Under the principle of equivalent wave energy and wave energy flux, the jet flow fields in regular and random waves are quantitatively compared. The results show that the jet centerline velocity exhibits a faster decay in regular waves than that in random waves, which could be directly related to the phenomenon of "twin peaks". |
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| Keywords: | jets regular waves random waves experiments |
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