Effect of clearance on measuring accuracy in two-dimensional piston flowmeter

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2024-08-17 DOI:10.1016/j.flowmeasinst.2024.102673

Chuan Ding , Sheng-xiang Pei , Hao-qi Chen , Yu Huang , Bin Meng , Li Liu

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Abstract

Accurate measurement of flow rates is essential in both industrial and scientific domains, with positive displacement flowmeters being particularly valued for their precision across diverse hydraulic engineering applications. This article offers an overview of piston flowmeters and delineates a cutting-edge two-dimensional (2D) piston flowmeter, expounding on its architectural and operational principles. Existing mathematical models have proven insufficiently effective in analyzing experimental results. In response to this deficiency, and to further scrutinize the flowmeter's empirical performance, the paper introduces an advanced mathematical model that explicitly considers the clearance between the rollers and the cam tracks inside the metering unit. The analytical solutions of the new model reveal a positive correlation between the increase in clearance size and the rise in discharge coefficient of the flowmeter, manifesting as alterations in the 2D piston motion pattern. Comparative to steady flow rate calibration results from prior studies, the newly calculated compensated discharge coefficient proves to more accurately predict the flowmeter's performance within the measurement range.

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间隙对二维活塞式流量计测量精度的影响

流量的精确测量在工业和科学领域都至关重要，而容积式流量计因其在各种液压工程应用中的精确性而备受推崇。本文概述了活塞式流量计，并介绍了一种先进的二维（2D）活塞式流量计，阐述了其结构和工作原理。事实证明，现有的数学模型在分析实验结果时不够有效。针对这一不足，为了进一步研究流量计的经验性能，本文引入了一个先进的数学模型，该模型明确考虑了计量装置内部滚子与凸轮轨道之间的间隙。新模型的分析解显示，间隙的增大与流量计排出系数的增大之间存在正相关，表现为二维活塞运动模式的改变。与之前研究的稳定流速校准结果相比，新计算出的补偿排出系数能更准确地预测流量计在测量范围内的性能。

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.