Research on dynamic characteristics of laminar flow meter

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2024-05-15 DOI:10.1016/j.flowmeasinst.2024.102619

Xiaolu Wang, Yijun Zhao, Haocheng Yu, Yichen Liu

{"title":"Research on dynamic characteristics of laminar flow meter","authors":"Xiaolu Wang, Yijun Zhao, Haocheng Yu, Yichen Liu","doi":"10.1016/j.flowmeasinst.2024.102619","DOIUrl":null,"url":null,"abstract":"<div><p>To research the dynamic characteristics of Laminar Flow Meter (LFM) on millisecond scale, a test device based on the pVTt gas flow standard device with a high-speed electromagnetic valve for generating unsteady flow is designed. According to the parameters of the device and the predicted characteristics of unsteady flow test, a sheet-type LFM with a range of 10 NL/min is designed, the dynamic characteristics of which under step flow and pulsating flow excitations are researched. The time-domain analysis of LFM output under step flow excitation shows that the delay time is 24.9 ms, the rise time is 29.2 ms, and the adjustment time is 55.3 ms. The results of pulsation flow test show that the LFM can effectively measure the instantaneous flow waveform of pulsating flow and the differences of cumulative flow given by the LFM and the test device are less than ±2 %. This research explores a feasible method to trace the dynamic characteristics of the LFM to the SI units, which provides a very valuable reference for researchers who encounter difficulties in flow measurement of unsteady flow research.</p></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"97 ","pages":"Article 102619"},"PeriodicalIF":2.3000,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Flow Measurement and Instrumentation","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955598624000992","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

To research the dynamic characteristics of Laminar Flow Meter (LFM) on millisecond scale, a test device based on the pVTt gas flow standard device with a high-speed electromagnetic valve for generating unsteady flow is designed. According to the parameters of the device and the predicted characteristics of unsteady flow test, a sheet-type LFM with a range of 10 NL/min is designed, the dynamic characteristics of which under step flow and pulsating flow excitations are researched. The time-domain analysis of LFM output under step flow excitation shows that the delay time is 24.9 ms, the rise time is 29.2 ms, and the adjustment time is 55.3 ms. The results of pulsation flow test show that the LFM can effectively measure the instantaneous flow waveform of pulsating flow and the differences of cumulative flow given by the LFM and the test device are less than ±2 %. This research explores a feasible method to trace the dynamic characteristics of the LFM to the SI units, which provides a very valuable reference for researchers who encounter difficulties in flow measurement of unsteady flow research.

查看原文本刊更多论文

层流流量计动态特性研究

为了研究层流流量计（LFM）在毫秒级的动态特性，设计了一种基于 pVTt 气体流量标准装置的试验装置，该装置带有用于产生非稳态流的高速电磁阀。根据该装置的参数和预测的非稳态流测试特性，设计了量程为 10 NL/min 的片式 LFM，研究了其在阶跃流和脉动流激励下的动态特性。阶跃流激励下 LFM 输出的时域分析表明，延迟时间为 24.9 ms，上升时间为 29.2 ms，调整时间为 55.3 ms。脉动流测试结果表明，LFM 能有效测量脉动流的瞬时流量波形，LFM 和测试装置给出的累积流量差异小于 ±2%。该研究探索了将 LFM 的动态特性溯源到 SI 单位的可行方法，为在非稳态流研究中遇到流量测量困难的研究人员提供了非常有价值的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.