Flow over thin-plate weirs with a triangular notch – influence of the relative width of approach channel with a rectangular cross-section

Author:

Pospíšilík Šimon1,Zachoval Zbyněk1,Gabriel Pavel1

Affiliation:

1. Brno University of Technology, Faculty of Civil Engineering , Institute of Water Structures , Veveří 331/95 , Brno , , Czech Republic .

Abstract

Abstract The article deals with the determination of the influence of the relative width of an approach channel with a rectangular cross-section on the discharge of clean water flowing over thin-plated weirs with a triangular notch and zero height of the weir above the bottom of the approach channel. To evaluate the influence, the Kindsvater-Shen equation was modified by introducing the basic effective discharge coefficient and the coefficient of the relative width of the approach channel. The coefficient of the relative width of the approach channel was determined based on the evaluation of data from three extensive experimental research investigations. It is valid for the entire possible range of relative widths of the approach channel and for the range of notch angles from 5.25° to 91.17°. The relative error of discharge determination is approximately up to ±2% over the entire range of discharges used in the conducted experimental research. The evaluation made it possible to determine the boundary distinguishing the partially contracted weirs from the fully contracted weirs in terms of impact on discharge.

Publisher

Walter de Gruyter GmbH

Reference43 articles.

1. Ali, A.A.M, Ibrahim, M., Diwedar, A.I., 2015. The discharge coefficient for a compound sharp crested V-notch weir. Asian J. Eng. Technol., 3, 5, 494–501.

2. Allerton, R.W., 1932. Flow of water over triangular weirs. Thesis. Princeton University, Princeton.

3. Barr, J., 1910. Experiments upon the flow of water over triangular notches. Engineering, 89, 435–437, 470–473.

4. Barrett, F.B., 1931. The flow of water over triangular weirs. Thesis. Princeton University, Princeton.

5. Bautista-Capetillo, C., Robles, O., Júnez-Ferreira, H., Playán, E., 2013. Discharge coefficient analysis for triangular sharpcrested weirs using low-speed photographic technique. J. Irrig. Drain. Eng. - ASCE, 140, 3, 06013005.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3