沿岸流实验水流循环装置研究
发布时间:2018-06-10 03:25
本文选题:沿岸流 + 水体循环系统 ; 参考:《大连理工大学》2014年硕士论文
【摘要】:沿岸流是比较重要的近岸水动力因素之一,对近岸泥沙输移运动、污染物扩散等问题有重要影响。目前沿岸流室内物理模型试验开展的最大困难在于水体循环的处理。本研究针对大连理工大学海岸及近海工程国家重点实验室的实验条件,提出和设计了一个结构简单,易于安装拆卸的主动式沿岸流实验水流循环系统。主要做了以下几个方面的工作: (1)分析荷兰代尔夫特理工大学和美国陆军工程研究开发中心海岸水动力实验室的沿岸流实验装置。两者优点是采用了主动水体循环系统,即水泵驱动下,水体通过管道从下游循环到上游。该循环方法的采用对实验效果有较大的提高,对比被动循环系统,沿岸流沿岸均匀性有明显的改善。分析大连理工大学海岸和近海工程国家重点实验室进行的沿岸流模拟实验,其采取的是被动水体循环方法,即没有外力驱动水体流动,任其自由从下游流回到上游。该循环方法所产生的沿岸流不能在整个海岸模型上形成均匀沿岸流,只在地形中间部分有较为均匀的沿岸流。 (2)提出和设计了一个结构简单,易于安装拆卸的主动式沿岸流实验水流循环系统。该实验装置使用的循环方法属于主动循环方法,在装置的作用下,水体以设定的流量分布形式流出,形成多种生流器流速剖面类型。利用6个生流器的组合对目标沿岸流流量分布进行拟合。保证在沿岸流模拟实验中,产生适合沿岸流量分布的供流量,从而改善沿岸流在整个海岸沿岸方向的分布均匀性。 (3)根据沿岸流实验布置设计了整体生流装置。整体生流器流量分布可根据实验需要的目标沿岸流确定,并通过水流循环系统将生流器与回流器连接,形成由下游返回上游的水流循环系统。给出了生流器现场安装布置结构图及控制器操控和连接方式。
[Abstract]:Coastal current is one of the most important hydrodynamic factors, which has an important effect on sediment transport and pollutant diffusion. At present, the biggest difficulty of indoor physical model test of coastal current is the treatment of water circulation. In view of the experimental conditions of the State key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology, a simple and easy to install and disassemble active coastal current experimental water circulation system is proposed and designed. The main work of this paper is as follows: 1) the coastal current experimental devices of Delft University of Technology in the Netherlands and the Coastal Hydropower Laboratory of the American Army Engineering Research and Development Center are analyzed. The advantage of both is that the active water circulation system is adopted, that is, the water body circulates from the downstream to the upstream through the pipe driven by the water pump. Compared with the passive circulation system, the riparian uniformity of the riparian current is obviously improved. This paper analyzes the coastal current simulation experiments carried out by the State key Laboratory of Coastal and Offshore Engineering of Dalian University of Science and Technology. The method of passive water circulation is adopted, that is, no external force drives the water body to flow freely from the downstream to the upstream. The coasts produced by this cycle method can not form uniform coastal currents on the whole coastal model, but only in the middle of the topography. A simple structure is proposed and designed. Easy to install and disassemble active coastal flow experimental flow cycle system. The circulation method used in this experiment belongs to the active circulation method. Under the action of the device, the water flows out in the form of a set flow rate distribution, forming a variety of flow generator flow profile types. The flow distribution of the target coastal current is fitted by the combination of six current generators. In order to improve the uniformity of the distribution of the coastal current along the whole coast, the supply flow suitable for the distribution of the coastal current is produced in the coastal current simulation experiment. 3) according to the arrangement of the littoral current experiment, the overall current generating device is designed. The flow distribution of the whole flow generator can be determined according to the target coastal current required by the experiment, and the flow generator is connected with the reflux through the flow cycle system to form the flow cycle system which returns from the downstream to the upstream. The structure diagram of the field installation and layout of the flow generator and the control and connection mode of the controller are given.
【学位授予单位】:大连理工大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TV139.2
【参考文献】
相关期刊论文 前4条
1 邹志利,王淑平,邱大洪,王艳,王风龙,董国海;Longshore Currents of Random Waves on Different Plane Beaches[J];China Ocean Engineering;2003年02期
2 ;Longshore currents of regular waves on different beaches[J];Acta Oceanologica Sinica;2003年01期
3 崔雷;唐军;沈永明;;近岸波浪及沿岸流数值模拟研究[J];水利学报;2008年12期
4 房克照;刘忠波;邹志利;孙家文;尹继伟;;波生沿岸流数值模拟[J];水科学进展;2013年02期
相关博士学位论文 前1条
1 张振伟;波生流垂向分布规律和模拟[D];大连理工大学;2013年
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