This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Experimental and Numerical Investigation of the Multiphase Flow and Heat Transfer in an Oil Jet Cooled Engine Piston
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
Annotation ability available
The piston temperature has to be carefully controlled to achieve effective and efficient thermal management in the internal combustion engines. One of the common methods to cool piston is by injecting oil from the crankcase underside to the piston under-crown area. In the present study, a novel 3-D multiphase thermal-fluid coupled model was developed using the commercial CFD software SimericsMP+ to study the piston cooling using the oil jet. In this model, an algorithm was proposed to couple the fluid and solid computation domain to account for the different timescale of heat transfer in the fluid and solid due to the high thermal inertia of the solid piston. The heat transfer coefficient (HTC) and reference temperature were mapped to the piston top surface and the liner temperature distribution was also used as the boundary condition. The temperature-dependent material properties, piston motion, and thermal contact resistance between the ring and piston were also accounted for. The oil film on the piston under-crown area was captured in the model to ensure an accurate prediction of the heat transfer coefficient. The piston temperature from the numerical simulation was validated against the experiment measurement at 13 different locations, and the root mean square error (RMSE) was within 13°C. Furthermore, this study investigated the effect of oil jet temperature and oil flow rate on the piston temperature distribution. The piston cooling model developed in the current study has demonstrated to be a valuable tool in optimizing piston design and development.
CitationChen, Y., Schlautman, J., and Dhar, S., "Experimental and Numerical Investigation of the Multiphase Flow and Heat Transfer in an Oil Jet Cooled Engine Piston," SAE Technical Paper 2020-01-0165, 2020.
- Agarwal, A.K. and Varghese, M.B. , “Numerical Investigations of Piston Cooling Using Oil Jet in Heavy Duty Diesel Engines,” International Journal of Engine Research 7(5):411-421, 2006.
- Varghese, M. and Agarwal, A. , “Numerical Investigations of Piston Cooling Using Oil Jet,” SAE Technical Paper 2004-28-0061 , 2004, https://doi.org/10.4271/2004-28-0061.
- Nasif, G., Barron, R.M., and Balachandar, R. , “Simulation of Jet Impingement Heat Transfer onto a Moving Disc,” International Journal of Heat and Mass Transfer 80:539-550, 2015.
- Nasif, G., Barron, R.M., and Balachandar, R. , “Numerical Simulation of Piston Cooling with Oil Jet Impingement,” Journal of Heat Transfer 138(12):122201, 2016.
- Pan, J., Nigro, R., and Matsuo, E. , “3-D Modeling of Heat Transfer in Diesel Engine Piston Cooling Galleries,” SAE Technical Paper 2005-01-1644 , 2005, https://doi.org/10.4271/2005-01-1644.
- Yi, Y., Reddy, M., Jarrett, M., Shyu, P. et al. , “CFD Modeling of the Multiphase Flow and Heat Transfer for Piston Gallery Cooling System,” SAE Technical Paper 2007-01-4128 , 2007, https://doi.org/10.4271/2007-01-4128.
- Dhar, S., Godavarthi, R., Mishra, A., Bedekar, S., and Ranganathan, R. , “A Transient, 3-Dimensional Multiphase CFD/Heat Transfer and Experimental Study of Oil Jet Cooled Engine Pistons,” SAE Technical Paper 2019-01-0154 , 2019, https://doi.org/10.4271/2019-01-0154.
- Hirt, C.W. and Nichols, B.D. , “Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries,” Journal of Computational Physics 39(1):201-225, 1981.