Novel kinetic energy dissipation CFD-based simulation over holed-steps spillway

IF 3.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2026-03-01 Epub Date: 2026-01-08 DOI:10.1016/j.flowmeasinst.2026.103192

Thaer Hashem , Jaafar S. Maatooq , Ahmed Y. Mohammed

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引用次数: 0

Abstract

This study aims to provide an innovative development the traditional steps by creating holes of dimensions, numbers and geometric arrangement to enable the flow to penetrate through and overlaps with the main flow passing over the crest, leading to an increase in turbulence areas responsible for increasing the chance of air interanment, which is meaning more increasing in the dissipation of kinetic energy. This new approach has been tested numerically using CFD and verified experimentally. Different scenarios of upstream flow conditions, and geometric properties of holes, perforation ratio, number of rows, spacing in between, and alignment have been adopted in the test. The results show that a lower perforation ratio, a single straight row, and a single step distance yield the best performance for the aim among all adopted scenarios. Compared to traditional design, the result indicated that the energy dissipation increased to approximately 130 % and the gained evacuated discharge up to 150 % for identical upstream flow conditions. Furthermore, Local pressure distribution reduction up to 85 %. Turbulent intensity, turbulent dissipation, flow field pressure fluctuation, and volume of fluid fraction perform well with decreasing perforation ratio, number of rows, and step distance, with straight alignment. This study will be beneficial for safely removing high excess flow while maintaining a safe downstream environment.

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基于cfd的孔阶溢洪道动能耗散模拟

本研究旨在对传统步骤进行创新发展，通过创造尺寸、数量和几何排列的孔，使气流穿透并与经过波峰的主流重叠，从而导致湍流区域的增加，从而增加空气介入的机会，这意味着动能耗散的增加。该方法已通过CFD数值测试和实验验证。试验采用了不同的上游流动工况，以及孔的几何特性、射孔比、排数、间距、对中等。结果表明，较低的射孔比、单一的直线和单一的步距可以获得最佳的瞄准性能。结果表明，与传统设计相比，在相同的上游流动条件下，该设计的能量耗散提高了约130%，获得的抽真空流量可达150%。此外，局部压力分布减少高达85%。随着射孔比、排数和步距的减小，直线对准时，湍流强度、湍流耗散、流场压力波动和流体分数体积表现良好。这项研究将有利于安全去除高过量流量，同时保持下游环境的安全。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Flow Measurement and Instrumentation 工程技术-工程：机械

CiteScore

4.30

自引率

13.60%

发文量

123

审稿时长

6 months

期刊介绍： Flow Measurement and Instrumentation is dedicated to disseminating the latest research results on all aspects of flow measurement, in both closed conduits and open channels. The design of flow measurement systems involves a wide variety of multidisciplinary activities including modelling the flow sensor, the fluid flow and the sensor/fluid interactions through the use of computation techniques; the development of advanced transducer systems and their associated signal processing and the laboratory and field assessment of the overall system under ideal and disturbed conditions. FMI is the essential forum for critical information exchange, and contributions are particularly encouraged in the following areas of interest: Modelling: the application of mathematical and computational modelling to the interaction of fluid dynamics with flowmeters, including flowmeter behaviour, improved flowmeter design and installation problems. Application of CAD/CAE techniques to flowmeter modelling are eligible. Design and development: the detailed design of the flowmeter head and/or signal processing aspects of novel flowmeters. Emphasis is given to papers identifying new sensor configurations, multisensor flow measurement systems, non-intrusive flow metering techniques and the application of microelectronic techniques in smart or intelligent systems. Calibration techniques: including descriptions of new or existing calibration facilities and techniques, calibration data from different flowmeter types, and calibration intercomparison data from different laboratories. Installation effect data: dealing with the effects of non-ideal flow conditions on flowmeters. Papers combining a theoretical understanding of flowmeter behaviour with experimental work are particularly welcome.