TY  - JOUR
AB  - Purpose The purpose of this study is to investigate the rheological behaviour of commercial lubrication oils used for cylinder lubrication in two-stroke marine diesel engines. Furthermore, it is of interest to investigate whether the viscosity of lubrication oils is affected by different levels of alkalinity.Design/methodology/approach Viscosity measurements are performed using both rotational and capillary rheometry. It was possible to measure oil viscosity in the shear rate from 0.1 to 3,000 s−1 using rotational rheometry, whereas capillary rheometry allowed measurements in higher shear rates from 5 × 105 to 1.3 × 106 s−1 at 50°C.Findings The viscosity measurements show that the studied lubrication oils behave as a Newtonian fluid and that the viscosities are insensitive to the level of alkalinity. Furthermore, the viscosity/temperature dependency for the lubrication oils was found to fit the Arrhenius model.Originality/value This study presents useful information about the rheological behaviour of lubrication oils, more precisely how the oil properties are affected by shear rate, temperature and level of alkalinity. The value of this research is considered to be important for designing two-stroke diesel engines and cylinder lubrication systems.
VL  - 69
IS  - 5
SN  - 0036-8792
DO  - 10.1108/ILT-03-2016-0075
UR  - https://doi.org/10.1108/ILT-03-2016-0075
AU  - Ravendran Rathesan
AU  - Jensen Peter
AU  - de Claville Christiansen Jesper
AU  - Endelt Benny
AU  - Appel Jensen Erik
PY  - 2017
Y1  - 2017/01/01
TI  - Rheological behaviour of lubrication oils used in two-stroke marine engines
T2  - Industrial Lubrication and Tribology
PB  - Emerald Publishing Limited
SP  - 750
EP  - 753
Y2  - 2024/09/19
ER  -