Dambreak generator for the Large Wave Flume (GWK+)

大波水槽 (GWK) 的破坝发生器

• 批准号: 534995424
• 金额: --
• 依托单位: Technische Universität Braunschweig
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/534995424?language=en
• 关键词: Dambreak; generator; Large; Wave; Flume

In experimental hydraulic and coastal engineering, dam-break gates are used to create a range of different flows. For this purpose, a wave channel is divided into two sections - in one section the water is impounded, while the other section is kept dry or has a significantly lower water level. With the help of a controlled, very fast opening process of the dam-break generator, different hydraulic phenomena, such as dam-break flows representing flash floods, bores as well as surge and sump waves can be controlled and systematically investigated. In addition to classical wave machines (e.g., piston type with vertical wall), dam breach generators expand the portfolio of hydraulic facilities to include other pioneering research opportunities. The dam-break generator applied for here will be used in the Large Wave Flume+ of the Coastal Research Center. A 4.9 m wide and 3.8 m high dam-break generator, which can be inserted into existing recesses for bulkhead placement, is planned for a functional generation of dam-break waves taking into account the scales and dimensions of the Large Wave Flume+. A maximum opening speed of about 1 s to the target height at the lower edge of the gate to the bottom of the channel of 1.5 m (1.35 m flow depth plus 0.15 m reserve height) creates an almost ideal dam-break flow during the rapid opening, which will serve three lines of research. The type of dam-break flow allows (1) the study of fluid-structure interaction between extreme flow events and buildings in terms of loading during flash floods, tsunami, or wave overtopping events, up to and including progressive collapse, (2) the generation and use of sunk (negative) and surge (positive) waves with a view to natural loading of banks and revetments due to ship waves, and (3) the study of scour and erosion development during transient flow events, with and without the influence of infrastructure elements such as bridges or abutments. The flow depths and velocities enabled with the dam-break generator will be unique, especially when combined with the large width that the dam-break gate will close off in the Large Wave Flume+. Existing research with dam-break flows is most often influenced by scale effects, which, however, can be significantly reduced or even entirely prevented by the achievable length scales in the Large Wave Flume+.

在实验性液压和沿海工程中，大坝破闸门用于创建一系列不同的流动。为此，将波通道分为两个部分 - 在一个部分中，水是扣押的，而另一部分则保持干燥或水位明显较低。借助大坝破裂发生器的受控，非常快速的打开过程，可以控制并系统地研究不同的液压现象，例如代表山洪泛滥的大坝爆破流量，孔以及泡沫和潮汐波。除了经典的波浪机（例如，带有垂直墙的活塞类型）外，大坝漏洞发电机还扩展了液压设施的投资组合，以包括其他开创性的研究机会。在此应用的大坝断裂发电机将用于沿海研究中心的大波浪水槽+。一个4.9 m的宽度和3.8 m高的大坝破裂发生器，可以插入现有的凹槽中以进行舱壁放置，​​以考虑到大型波浪量+的尺度和尺寸，以实现功能性的大坝断层波。到达门的下边缘至1.5 m（1.35 m的流量深度加0.15 m储备高度）的最大开放速度约为1秒钟，在快速开放期间，几乎是理想的大坝突破流量，这将提供三种研究。 The type of dam-break flow allows (1) the study of fluid-structure interaction between extreme flow events and buildings in terms of loading during flash floods, tsunami, or wave overtopping events, up to and including progressive collapse, (2) the generation and use of sunk (negative) and surge (positive) waves with a view to natural loading of banks and revetments due to ship waves, and (3) the study of scour and erosion development during transient flow事件，有或没有基础设施元素的影响，例如桥梁或基台。大坝破裂发生器实现的流量深度和速度将是独一无二的，尤其是当与大型波浪水槽中的大坝破闸门结合在一起时，尤其是在大型大型壁上关闭的宽度时。现有的大坝流量研究通常受到量表效应的影响，但是，大波浪水槽中的可实现的长度尺度可以显着降低甚至完全阻止。