A process explanation of orifice choking caused by calcium detergent in lubricating oil

A. Yano, S. Watanabe, S. Matsumoto

    Research output: Contribution to journalArticle

    Abstract

    In orifices at the average fluid flow of 15-50 m/sec, the phenomenon of piling up of particles contained in oil (1-5 μm) was detected. The testing for adhesion considering the effects exerted by Ca-base detergent and water content indicated that the adhesion of calcium carbonate to the orifice needs the presence of calcium and water. The relationship between the average flow velocity and the site of adhesion was established. The process of orifice choking was considered in relation to the electrification occurring during the flow of fluids at a high velocity through the orifice. The adhered products were calcium carbonate and the coarsening of calcium carbonate particles occurring at the admixture of water to oils containing Ca-based detergent contributes to the adhesion. The Van der Waals force governed the adhesion of calcium carbonate particles to orifice metal at the initial stage, and the growth of the adhered calcium carbonate layer was due to the electrostatic attraction generated by the electrification of fluid.

    Original languageEnglish
    Pages (from-to)759-772
    Number of pages14
    JournalJapanese Journal of Tribology
    Volume43
    Issue number6
    Publication statusPublished - 1998

    Fingerprint

    Calcium Carbonate
    Lubricating oils
    Detergents
    Calcium carbonate
    Orifices
    Calcium
    Adhesion
    Flow of fluids
    Oils
    Van der Waals forces
    Water
    Coarsening
    Flow velocity
    Water content
    Piles
    Electrostatics
    Metals
    Fluids
    Testing

    ASJC Scopus subject areas

    • Mechanical Engineering

    Cite this

    A process explanation of orifice choking caused by calcium detergent in lubricating oil. / Yano, A.; Watanabe, S.; Matsumoto, S.

    In: Japanese Journal of Tribology, Vol. 43, No. 6, 1998, p. 759-772.

    Research output: Contribution to journalArticle

    Yano, A. ; Watanabe, S. ; Matsumoto, S. / A process explanation of orifice choking caused by calcium detergent in lubricating oil. In: Japanese Journal of Tribology. 1998 ; Vol. 43, No. 6. pp. 759-772.
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