Evaluation of the hydraulic behavior of the composite hydraulic structure considering a bed flume with special obstacle

Q2 Engineering

INCAS Bulletin Pub Date : 2022-09-09 DOI:10.13111/2066-8201.2022.14.3.6

Rafi M. Qasim, Ihsan A. Abdulhussein, A. Mohammed, Qusay A. Maatooq

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引用次数: 0

Abstract

The experimental simulation between the composite hydraulic structure and the found obstacles in the downstream region is a challenging process due to the energy losses and kinematic dissipation. The current work focuses on a comparative analysis of free flow conditions that exist without obstacles and submerged flow conditions that occur due to obstacles. It indicates the evaluation of hydraulic variables and geometrical variables of composite hydraulic structure for both flow conditions. In addition, it includes an investigation of the interaction among these variables. The hydraulic variables include actual discharge, flow velocity, flow cross-sectional area that crosses the gate, downstream water depth, discharge coefficient, Reynolds number and, Froude number, while the vertical distance between the weir and gate represents the geometry variable. The interference between the weir discharge and gate discharge plays a significant role in the result fluctuation and variation for both flow conditions, while the form and size of the obstacles only have a major effect on the submerged flow. For both flow conditions, the water depth is investigated; there would be a drastic increase in water depth by using obstacles in the downstream area as compared with not using the obstacles. This study adopts different obstacles in shape and size, therefore, the variation of maximum and minimum water levels related to the location will occur.

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考虑特殊障碍物河床水槽的复合水工结构水力性能评价

由于能量损失和运动耗散，复合水工构筑物与下游发现的障碍物之间的实验模拟是一个具有挑战性的过程。目前的工作重点是对无障碍物存在的自由流动条件和由于障碍物而发生的淹没流动条件进行比较分析。给出了两种流动条件下复合水工结构的水力变量和几何变量的评价。此外，它还包括对这些变量之间相互作用的调查。水力变量包括实际流量、流速、流过闸门的水流截面积、下游水深、流量系数、雷诺数、弗劳德数，几何变量为堰与闸门的垂直距离。堰流和闸流之间的干扰对两种流动条件下的结果波动和变化都起着重要的作用，而障碍物的形式和大小对淹没流只有主要的影响。对两种流动条件下的水深进行了研究;与不使用障碍物相比，在下游区域使用障碍物会使水深急剧增加。本研究采用不同形状和大小的障碍物，因此会出现与位置相关的最高和最低水位变化。

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

INCAS Bulletin Engineering-Aerospace Engineering

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： INCAS BULLETIN is a scientific quartely journal published by INCAS – National Institute for Aerospace Research “Elie Carafoli” (under the aegis of The Romanian Academy) Its current focus is the aerospace field, covering fluid mechanics, aerodynamics, flight theory, aeroelasticity, structures, applied control, mechatronics, experimental aerodynamics, computational methods. All submitted papers are peer-reviewed. The journal will publish reports and short research original papers of substance. Unique features distinguishing this journal: R & D reports in aerospace sciences in Romania The INCAS BULLETIN of the National Institute for Aerospace Research "Elie Carafoli" includes the following sections: 1) FULL PAPERS. -Strength of materials, elasticity, plasticity, aeroelasticity, static and dynamic analysis of structures, vibrations and impact. -Systems, mechatronics and control in aerospace. -Materials and tribology. -Kinematics and dynamics of mechanisms, friction, lubrication. -Measurement technique. -Aeroacoustics, ventilation, wind motors. -Management in Aerospace Activities. 2) TECHNICAL-SCIENTIFIC NOTES and REPORTS. Includes: case studies, technical-scientific notes and reports on published areas. 3) INCAS NEWS. Promote and emphasise INCAS technical base and achievements. 4) BOOK REVIEWS.