The ferro-oils viscosity depended simultaneously on the temperature and magnetic oil particles concentration η = η(t,ϕ). Part 1

• Autorzy: Frycz M.

Identyfikatory

DOI

10.5604/12314005.1213575

• Języki publikacji: EN

Abstrakty

EN

The purpose of this article is to determine, identify and describe the viscosity characteristics of the ferro-oil with different concentrations of magnetic particles at context of temperature changes. These characteristics were determined for the following test conditions: atmospheric pressure, constant shear rate and absent of an external magnetic field. Tests were performed for selected concentrations of magnetic particles in ferro-oil ranging: 1%, 2%, 4%, 6% and 8%. Tested ferro-oil was product from Unterensingen FerroTec Company (Germany) which is a mixture of colloidal mineral engine oil LongLife Gold Penzzoil class SAE 15W-40 with addition of Fe3O4 magnetic particles and a surfactant. Analysis of the results, identifying and fitting of characteristics has been made by means of software StatSoft STATISTICA ver.9.1. There has been also undertaken comparison of the accuracy of estimation of reached results by selected mathematical models as well as these results have been rated according to their compliance with theoretical assumptions. Moreover, the waveform parameters of functions have been determined and their assessed quality has been done also. The obtained characteristics going to be used by author in his future work to build mathematical models of viscosity changes of ferro-oils in the aspect of changes of parameters like temperature, pressure, shear rate and the value of the external magnetic field. The determined parameters of physical properties will be used in analytical and numerical studies of flow and operating parameters of slide journal bearings lubricated with ferro-oils.

Słowa kluczowe

EN

ferro-oil; dynamic viscosity; magnetic particles concentration

• 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: 2016
• Tom: Vol. 23, No. 2
• Strony: 113--120
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Frycz M.

• Maritime University Gdynia Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Anioł, P., Frycz, M., Eksperymentalna metoda wyznaczania współczynników podatności magne-tycznej χ ferro-olejów o różnym stężeniu cząstek magnetycznych, Tribologia. Teoria i Praktyka, Nr 3 (255), pp. 29-38, 2014.
• [2] Czaban, A., Frycz, M., Horak, W., Effect of the magnetic particles concentration on the ferro-oil’s dynamic viscosity in presence of an external magnetic field in the aspect of temperature changes, Journal of KONES Powertrain and Transport, Vol. 20, No. 2, pp. 55-60, 2013.
• [3] Czaban, A., Frycz, M., Models of viscosity characteristics η=η(B) of ferro-oil with different concentration of magnetic particles in the presence of external magnetic field, Journal of KONES Powertrain and Transport, Vol. 21, No. 4, pp. 119-126, 2014.
• [4] Frycz, M., Czaban, A., Influence of pressure on dynamic viscosity of ferro-oils, Zeszyty Naukowe Akademii Morskiej w Gdyni, No. 83, pp. 44-52, Gdynia 2014.
• [5] Frycz, M., Effect of concentration of magnetic particles on ferrooil’s dynamic viscosity as a function of temperature and shear rate, Journal of KONES Powertrain and Transport, Vol. 19, No. 2, pp. 159-165, 2012.
• [6] Frycz, M., Effect of temperature and deformation rate on the dynamic viscosity of ferrofluid, Solid State Phenomena, Vol. 199, pp. 137-142, 2013.
• [7] Frycz, M., Anioł, P., Impact of magnetic particles concentration in ferro-oil on its magnetic susceptibility coefficient χ, Journal of KONES Powertrain and Transport, Vol. 21, No. 4, pp. 111-117, 2014.
• [8] Jianmei, W., Jianfeng, K., Yanjuan, Z., Xunjie H., Viscosity monitoring and control on oil-film bearing lubrication with ferrofluids, Tribology International, Vol. 75, pp. 61-68, 2014.
• [9] Miszczak, A., Analiza hydrodynamicznego smarowania ferrociecza poprzecznych łożysk ślizgowych, Akademia Morska w Gdyni, 2006, Gdynia.
• [10] Szeri, AZ., Fluid film lubrication, Theory and Deisgn, Cambridge University Press, Cambridge 1998.
• [11] Wierzcholski, K., Stochastic changes of pressure after impulse in slide bearing gap, Journal of Polish CIMAC, pp. 493-501, 2007.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.