A novel vibrational sensor for high precision viscometry of liquids in wide ranges of temperature and pressure

Author:

Junker Clemens1ORCID,Laesecke Arno2ORCID,Meier Karsten1ORCID

Affiliation:

1. Institut für Thermodynamik, Helmut-Schmidt-Universität/Universität der Bundeswehr Hamburg 1 , Holstenhofweg 85, 22043 Hamburg, Germany

2. Retired 2 , 516 West Ash Court, Louisville, Colorado 80027, USA

Abstract

This report describes how the insights from the two previous studies led to a newly designed viscosity sensor that centers around a torsionally vibrating piezoelectric quartz cylinder. The main features of the sensor are line conductor electrodes for improved piezoelectric excitation of the torsional vibration of the quartz cylinder and a novel suspension of the cylinder with significantly reduced vibrational losses. The quartz cylinder itself was machined with higher accuracy and much reduced surface roughness than before. The resulting sensor is more compact, easier to assemble, and offers greater access to the liquid whose viscosity is to be determined. The sensor was incorporated and calibrated in an experimental manifold for automated measurements in a wide temperature range from 200 to 420 K with pressures up to 100 MPa. The performance of the sensor is assessed by a detailed uncertainty analysis and validated by measurements of the aromatic hydrocarbon toluene, whose viscosity is considered to be known at standard reference quality. Representative measurement results for most of the experimental temperature range are presented at standard atmospheric pressure, while results for the entire pressure range are reported at two temperatures, 303.15 and 393.15 K, at which comparisons with literature data are possible. They confirm that with an achieved 0.2% the uncertainty development goal of the sensor of less than 1% has been exceeded and is approximately by an order of magnitude improved over previous such sensors, while the repeatability of the new sensor is 0.02%.

Funder

Wolfram-Funk-Award

Publisher

AIP Publishing

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