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Development of an Ultrasonic Sensing Technique to Measure Lubricant Viscosity in Engine Journal Bearing In-Situ

  1. Title statementDevelopment of an Ultrasonic Sensing Technique to Measure Lubricant Viscosity in Engine Journal Bearing In-Situ [electronic resource] / by Michele Schirru.
    PublicationCham : Springer International Publishing : Imprint: Springer, 2017.
    Phys.des.XVI, 167 p. 155 illus., 80 illus. in color. online resource.
    ISBN9783319534084
    EditionSpringer Theses, Recognizing Outstanding Ph.D. Research, ISSN 2190-5053
    ContentsIntroduction -- Background on Viscosity and Lubrication -- Background on Ultrasound -- Literature review -- A Novel Ultrasonic Model for Non-Newtonian Fluids -- Viscosity Measurement at an Aluminium-Oil Boundary -- The Matching Layer Method -- Viscosity Measurement in a Journal Bearing -- Conclusions.
    Notes to AvailabilityPřístup pouze pro oprávněné uživatele
    Another responsib. SpringerLink (Online service)
    Subj. Headings Engineering. * Acoustical engineering. * Automotive engineering. * Tribology. * Corrosion and anti-corrosives. * Coatings. * Materials science. * Materials - Surfaces. * Thin films.
    Form, Genre elektronické knihy electronic books
    CountryNěmecko
    Languageangličtina
    Document kindElectronic books
    URLPlný text pro studenty a zaměstnance UPOL
    book

    book


    This thesis presents a novel ultrasonic instrument for non-invasive and in-situ characterization of journal bearing lubricant viscosity. In particular, the application to journal bearings is described by non-invasively measuring the viscosity and localized power losses throughout operation. This ultrasonic viscometer is based on the reflection of polarized shear waves from a thin resonating coating layer to increase the measurement sensitivity, in comparison to conventional ultrasonic methods. This instrument allows for a full engine oil viscoelastic characterization in-situ. The book investigates the effects of temperature, pressure and shear rate, and describes in detail the ultrasonic setup and method. Further, it demonstrates that the same technique can be applied similarly to monitor the lubrication of other engine components. As such, it offers a unique instrument that can drive the research of oil formulations to improve engine performance and fulfill the requirements of international fuel economy regulations. .

    Introduction -- Background on Viscosity and Lubrication -- Background on Ultrasound -- Literature review -- A Novel Ultrasonic Model for Non-Newtonian Fluids -- Viscosity Measurement at an Aluminium-Oil Boundary -- The Matching Layer Method -- Viscosity Measurement in a Journal Bearing -- Conclusions.

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