Publicação: Characterization of lubricating oil using ultrasound
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Resumo
This paper presents an ultrasonic method to measure small concentrations of water in lubricating oil. It uses an ultrasonic measurement cell composed by a piezoceramic emitter (5 and 10 MHz), and a large aperture PVDF receiver that eliminates diffraction effects. The propagation velocity, attenuation coefficient and density of several samples of water-in-oil emulsion were measured. The concentrations of water of the samples were in the range of 0 to 5% in volume, and the results showed that these low concentrations can be discriminated within a resolution of 0.2% in the studied range, using the measurement of the propagation velocity.
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Liquid characterization, Lubricating oil, Ultrasound, Attenuation, Characterization, Ultrasonic applications, Velocity, Water, Wave propagation, Attenuation coefficient, Piezoceramic emitter, Propagation velocity, Water in oil emulsion, Lubricating oils
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Inglês
Como citar
Revista Brasileira de Ciencias Mecanicas/Journal of the Brazilian Society of Mechanical Sciences, v. 23, n. 4, p. 453-461, 2001.
