为了获得准确的流体黏度数据
基于振动弦理论
研制了一套高压振动弦黏度测量实验系统.该系统具有精度高、稳定可靠、测量范围大等特点
测量温度范围为243~400K
压力范围为0~40MPa.利用标准物质甲苯对实验系统进行了标定和检验
黏度测量的不确定度为±2.0%.此外
利用制冷剂R134a对实验系统进行了检验
并将实验结果与文献值进行了比较.结果表明
实验系统准确可靠
可以用于流体黏度的高精度测量.
A new two-end-pinned vibrating-wire viscometer was developed for liquid viscosity measurement at high pressure to obtain the accurate viscosity data of fluids. The working equations describing the motion of the wire clamped in such a way are applied to calculate the viscosity with a known density as an input. The instrument developed can provide considerably accurate viscosity results in the wide temperature and pressure ranges(243-400 K
0-40 MPa). Toluene was used to calibrate the radius of the wire at 298.15 K and 0.1 MPa
and then viscosity of toluene was measured at temperatures from 248.15 to 348.15 K and at pressures up to 40 MPa. The uncertainty of the viscosity measurement was estimated to be ±2.0%. Additionally
the viscosity of R134a at temperatures from 248.15 to 348.15 K and at pressures up to 40 MPa was reported. The comparison between the results of this work and the data in literature was presented.
{"db_type":"WWJDREF","db_name":"国际期刊","reference_articles":[{"patent_date":"2003-06-15","unit":"Fluid Phase Equilibria","flag":"[J]","issue":"1","year":2003,"index":1,"title":"Viscosity measurements and correlations for 1,1,1,2-tetrafluoroethane (HFC-134a) up to 140 MPa"},{"unit":"International Journal of Thermophysics","flag":"[J]","year":2001,"author":"M. J. Assael;H. M. T. Avelino;N. K. Dalaouti;J. M. N. A. Fareleira;K. R. Harris","index":2,"title":"Reference Correlation for the Viscosity of Liquid Toluene from 213 to 373 K at Pressures to 250 MPa"},{"patent_date":"1995-09-01","unit":"International Journal of Thermophysics","flag":"[J]","issue":"4","year":1996,"author":"A. A. H. Pádua;J. M. N. A. Fareleira;J. C. G. Calado;W. A. Wakeham","index":3,"title":"Validation of an accurate vibrating-wire densimeter: Density and viscosity of liquids over wide ranges of temperature and pressure"},{"patent_date":"1994-04-04","unit":"International Journal of Thermophysics","flag":"[J]","issue":"4","year":1994,"author":"M. J. Assael;J. H. Dymond;S. K. Polimatidou","index":4,"title":"Measurements of the viscosity of R134a and R32 in the temperature range 270–340 K at pressures up to 20 MPa"},{"patent_date":"1992-09-23","unit":"International Journal of Thermophysics","flag":"[J]","issue":"1","year":1993,"author":"C. M. B. P. Oliveira;W. A. Wakeham","index":5,"title":"The viscosity of liquid R134a"},{"patent_date":"1992-07-01","unit":"International Journal of Thermophysics","flag":"[J]","issue":"6","year":1992,"author":"T. Okubo;T. Hasuo;A. Nagashima","index":6,"title":"Measurement of the viscosity of HFC 134a in the temperature range 213–423 K and at pressures up to 30 MPa"},{"patent_date":"1987-06-15","unit":"Applied Scientific Research","flag":"[J]","issue":"4","year":1987,"author":"T. Retsina;S. M. Richardson;W. A. Wakeham","index":7,"title":"The theory of a vibrating-rod viscometer"},{"patent_date":"1986-06-15","unit":"Applied Scientific Research","flag":"[J]","issue":"2","year":1986,"author":"T. Retsina;S. M. Richardson;W. A. Wakeham","index":8,"title":"The theory of a vibrating-rod densimeter"}],"articles_count":8}
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