Laser-Doppler vibrating tube densimeter for measurements at high temperatures and pressures

A laser-Doppler vibrometer was used to measure the vibration of a vibrating tube densimeter for measuring P - V - T data at high temperatures and pressures. The apparatus developed allowed the control of the residence time of the sample so that decomposition at high temperatures could be minimized....

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Bibliographic Details
Published in:Review of scientific instruments 2007-11, Vol.78 (11), p.115111-115111-3
Main Authors: Aida, Tsutomu, Yamazaki, Ai, Akutsu, Makoto, Ono, Takumi, Kanno, Akihiro, Hoshina, Taka-aki, Ota, Masaki, Watanabe, Masaru, Sato, Yoshiyuki, Smith, Richard L., Inomata, Hiroshi
Format: Article
Language:English
Subjects:
BEAMS
CONTROL
CRYSTALS
DECOMPOSITION
DENSIMETERS
DENSITY
FUNCTION GENERATORS
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LASERS
METHANOL
MIXTURES
PIEZOELECTRICITY
TEMPERATURE RANGE 0400-1000 K
TUBES
WATER
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Summary:A laser-Doppler vibrometer was used to measure the vibration of a vibrating tube densimeter for measuring P - V - T data at high temperatures and pressures. The apparatus developed allowed the control of the residence time of the sample so that decomposition at high temperatures could be minimized. A function generator and piezoelectric crystal was used to excite the U-shaped tube in one of its normal modes of vibration. Densities of methanol-water mixtures are reported for at 673 K and 40 MPa with an uncertainty of 0.009 g ∕ cm 3 .
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2805615