{"title":"层流流量计动态特性研究","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":"{\"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}","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}
Research on dynamic characteristics of laminar flow meter
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.
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.
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