基于数值模拟的钢琴键堰迭代水力设计方法

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Mete Koken, Ismail Aydin, Serhan Ademoglu
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引用次数: 3

摘要

钢琴键堰(PKW)是一种特殊类型的溢流堰,通过增加波峰长度来提高泄流能力。增加的排放能力使该堰成为修复现有溢洪道的一个有吸引力的选择。引入这种新型堰型后,进行了大量的实验和数值研究,以了解多种几何参数对流量的影响。然而,不同研究人员提出的经验流量公式并不符合一个唯一的表达式,这主要是由于它们的推导依赖于实验条件。本文采用数值方法研究了PKW机组的放电容量与几个几何参数的关系。利用FLOW-3D®软件开发了数值模型并计算了三维速度场。在29种不同PKW模型的145个数值解的实际参数范围内,对等效线性尖峰堰上PKW的放电效率进行了评估。利用数值计算得到的数据,形成堰高和堰长随流量效率的无量纲表达式,以便于迭代求解,以满足工程的设计要求。这种方法可以优化成本,同时根据所需的水力容量确定PKW的尺寸。描述并举例说明了基于迭代数值解的设计过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An iterative hydraulic design methodology based on numerical modeling for piano key weirs

Piano Key Weir (PKW) is a special type of overflow weir which provides an improved discharge capacity with its increased crest length. Increased discharge capacity makes this weir an attractive alternative in the rehabilitation of existing spillways. After the introduction of this new weir type, many experimental and numerical studies are conducted to understand the effect of the numerous geometrical parameters on the discharge capacity. However, empirical discharge formulas suggested by different researchers are not conforming to a unique expression mostly due to dependence on the experimental conditions from which they are derived. A numerical approach is used in the present study to investigate the dependence of discharge capacity of a PKW unit on several geometric parameters. Numerical models are developed and three-dimensional velocity fields are computed using FLOW-3D® software. Discharge efficiency of a PKW over an equivalent linear sharp-crested weir is evaluated within the practical range of parameters from 145 numerical solutions for 29 different PKW models. Numerically obtained data is used to form dimensionless expressions for the weir height and length as function of discharge efficiency which are proposed to facilitate an iterative numerical solution to meet the design requirements of a given project. This approach allows cost optimization while dimensioning the PKW for the required hydraulic capacity. The design procedure based on iterative numerical solutions is described and exemplified.

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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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