Thermal Characteristics Investigation of the Internal Combustion Engine Cooling-Combustion System Using Thermal Boundary Dynamic Coupling Method and Experimental Verification

The engine cooling system must be able to match up with the stable operating conditions so as to guarantee the engine performance. On the working cycle level, however, the dynamic thermo-state of engines has not been considered in the cooling strategy. Besides, the frequent over-cooling boiling inside the gallery changes the cooling capacity constantly. It is necessary to study the coupling effect caused by the interaction of cooling flow and in-cylinder combustion so as to provide details of the dynamic control of cooling systems. To this end, this study develops a coupled modeling scheme of the cooling process considering the interaction of combustion and coolant flow. The global reaction mechanism is used for the combustion process and the multiphase flow method is employed to simulate the coolant flow considering the wall boiling and the interphase forces. The two sub-models exchange information of in-cylinder temperature, heat transfer coefficient, and wall temperature to achieve the coupled computation. The proposed modeling process is verified through the measured diesel engine power, in-cylinder pressure, and fire surface temperature of cylinder head. Then the effects of different cooling conditions on the cyclic engine performances are analyzed and discussed.

[1]  Francesco Pizzonia,et al.  A dynamic nucleate-boiling model for CO2 reduction in internal combustion engines , 2015 .

[2]  Francesco Pizzonia,et al.  Detecting the onset of nucleate boiling in internal combustion engines , 2016 .

[3]  T. Frank,et al.  The Favre Averaged Drag Model for Turbulent Dispersion in Eulerian Multi-Phase Flows , 2004 .

[4]  Kwonhue Choi,et al.  Active coolant control strategies in automotive engines , 2010 .

[5]  Rudolf Maly,et al.  A Fundamental Model for Flame Kernel Formation in S. I. Engines , 1992 .

[6]  Francesco Pizzonia,et al.  A Robust Model Predictive Control for efficient thermal management of internal combustion engines , 2016 .

[7]  Ali Amini,et al.  Optimization of heat transfer and efficiency of engine via air bubble injection inside engine cooling system , 2017 .

[8]  John R. Wagner,et al.  Advanced automotive thermal management – Nonlinear radiator fan matrix control , 2015 .

[9]  Bing Zhou,et al.  Numerical model and control strategies for the advanced thermal management system of diesel engine , 2015 .

[10]  C. Westbrook,et al.  Simplified Reaction Mechanisms for the Oxidation of Hydrocarbon Fuels in Flames , 1981 .

[11]  Xavier Tauzia,et al.  Experimental study of an automotive Diesel engine efficiency when running under stoichiometric conditions , 2013 .

[12]  Kyoungdoug Min,et al.  Smart cooling system of the double loop coolant structure with engine thermal management modeling , 2015 .

[13]  J. Flaherty,et al.  Analysis of phase distribution in fully developed laminar bubbly two-phase flow , 1991 .

[14]  Johann C. Wurzenberger,et al.  Assessment of engine thermal management through advanced system engineering modeling , 2014, Adv. Eng. Softw..

[15]  J. Lienhard.  A heat transfer textbook , 1981 .

[16]  Kyoungdoug Min,et al.  Analysis of engine temperature and energy flow in diesel engine using engine thermal management , 2013 .

[17]  D. Allen,et al.  Thermal Management Evolution and Controlled Coolant Flow , 2001 .

[18]  V. I. Tolubinsky,et al.  VAPOUR BUBBLES GROWTH RATE AND HEAT TRANSFER INTENSITY AT SUBCOOLED WATER BOILING , 1970 .

[19]  Fabián J. Bonetto,et al.  Lateral forces on spheres in turbulent uniform shear flow , 1999 .

[20]  Imdat Taymaz,et al.  An experimental study of energy balance in low heat rejection diesel engine , 2006 .

[21]  Robert Cole,et al.  A photographic study of pool boiling in the region of the critical heat flux , 1960 .