Pressure and velocity distribution in slide journal plane bearing lubricated with micropolar oil

• Autorzy: Krasowski P.
• Języki publikacji: EN

Abstrakty

EN

Present paper shows the results of numerical solution Reynolds equation for laminar, steady oil flow in slide plane bearing gap. Lubrication oil is fluid with micropolar structure. Materials engineering and tribology development helps to introduce oils with the compound structure (together with micropolar structure) as a lubricating factors. Properties of oil lubrication as of liquid with micropolar structure in comparison with Newtonian liquid, characterized are in respect of dynamic viscosity additionally dynamic couple viscosity and three dynamic rotation viscosity. Under regard of build structural element of liquid characterized is additionally microinertia coefficient. In modelling properties and structures of micropolar liquid one introduced dimensionless parameter with in terminal chance conversion micropolar liquid to Newtonian liquid. The results shown on diagrams of hydrodynamic pressure, velocity and velocity of microrotation distribution in dimensionless form in dependence on coupling number N2 and characteristic dimensionless length of micropolar fluid Lambda 1. Differences were showed on graphs in the schedule of the longitudinal velocity oils after the height of the gap in the flow of the micropolar and Newtonian liquid. In presented flow, the influence of lubricating fluid inertia force and the external elementary body force field were omitted. Presented calculations are limited to isothermal models of bearing with infinite breadth.

Słowa kluczowe

EN

micropolar lubrication; journal plane bearing; hydrodynamic pressure; velocity; velocity of microrotation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 2
• Strony: 249--256
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Krasowski P.

• Gdynia Maritime University Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax:[phone],

Bibliografia

• [1] Das, S., Guha, S. K., Chattopadhyay, A. K., Linear stability analysis of hydrodynamic journal bearings under micropolar lubrication, Tribology International, 38, pp.500-507, 2005.
• [2] Krasowski, P., Stacjonarny, laminarny przepływ mikropolarnego czynnika smarującego w szczelinie smarnej poprzecznego łożyska ślizgowego, Zeszyty Naukowe, Nr 49, pp. 72-90, Akademia Morska, Gdynia 2003.
• [3] Krasowski, P., Pressure and capacity force in slide journal plane bearing lubricated oil with micropolar structure, Jornal of KONES Powertrain and Transport, Vol. 16, No. 2, pp. 247-252, Warsaw 2009.
• [4] Łukaszewicz, G., Micropolar Fluids. Theory and Aplications, Birkhäuser Boston 1999.
• [5] Walicka, A., Reodynamika przepływu płynów nienewtonowskich w kanałach prostych i zakrzywionych, Uniwersytet Zielonogórski, Zielona Góra 2002.
• [6] Walicka, A., Inertia effects in the flow of a micropolar fluid in a slot between rotating sufrages of revolution, International Journal of Mechanics and Engineering, Vol. 6, No. 3, pp. 731-790, 2001.
• [7] Wierzcholski, K., Mathematical methods in hydrodynamic theory of lubrication, Technical University Press, Szczecin 1993.
• [8] Wang, X.-L., Zhu, K.-Q., A study of the lubricating effectiveness of micropolar fluids in a dynamically loaded journal bearing, Tribology International, 37, pp. 481-490, 2004.
• [9] Qiu, Z.-G., Lu, Z.-J., Lubrication theory for micropolar fluids and its application to a journal bearing with finite length, Applied Mathematics and Mechanics, Vol. 8, No. 7, pp. 655-665, Shanghai, China 1987.