Experimental investigation on the hydraulics of a new two-cycle inclined-bed triangular labyrinth side weir in straight open channels

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2025-02-12 DOI:10.1016/j.flowmeasinst.2025.102846

Mohammad Parvaneh , Ali Parvaneh , Gholam Reza Rakhshandehroo , Mohammad Reza Jalili Ghazizadeh , Hadi Sadeghian

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引用次数: 0

Abstract

Side weirs are commonly used as hydraulic control structures to regulate water discharge from water conveyance systems such as drainage, irrigation, and other open channels. In particular, labyrinth geometries have been employed by researchers to increase the crest length of side weirs. In this study, a new inclined-bed design for two-cycle triangular side weirs was proposed and its discharge properties were investigated. Using various hydraulic variables and geometric designs, 161 experiments were conducted, and the nonlinear partial least squares (PLS) method was applied to develop an equation to estimate the discharge coefficient. Based on error analysis of the equation, most of the calculated values fell within ±7 % of the measurement values. The results showed an accuracy of ±3.76 % and a normalized root mean squared error (NRMSE) of 0.35 for the equation, which were considered satisfactorily acceptable. The proposed design exhibited a significant efficiency improvement of up to 55 % and 76 % relative to those of two-cycle orthogonal-bed triangular labyrinth side weir and rectangular side weir, respectively. Based on the results, the proposed two-cycle side weir was more effective than its one-cycle counterpart by 16 % for the same opening length (

L

) and protrusion size (e).

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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.