Numerical Simulation on Flow and Heat Transfer of Cooling Water-Jacket in Cylinder Head for Euro-IIIEmission Diesel Engine

The cooling water-jacket of Euro-Ⅲ diesel engine was studied by CFD simulation.The whole flow uniformity of the cooling water-jacket and the pressure loss of the whole engine was evaluated,and the flow velocity and heat transfer coefficient of the cooling water through the cooling water-jacket around the fire power face of the cylinder head,the fuel injector hole and the exhaust passage was analyzed in detail.The simulation results show that the flow uniformity and pressure loss of the cooling water-jacket can meet the operating requirements;the flow capacity of the cooling water flowing along the water-jacket around the fire power face and the exhaust passage was distributed equitably;the water-jacket around the fire power face of the cylinder head,the fuel injector hole and the exhaust passage was fully cooled.