Numerical Investigation on Water Flow in Engine Cooling-Water Jacket

Abstract

The engine cooling water jacket has a major impact on the efficiency of the engine. In this paper the flow in the cooling water jacket of the six-cylinder four stroke water-cooled diesel engine was studied with the commercial software of STAR CCM+. Results of the simulation reveals that velocity has little effect on the flow field distributions. Dead zone in engine cylinder head appeared far away from the inlet of the flow. But it could be avoided or improved effectively by arranging the inlet and outlet at opposite side of the cooling water jacket. Further study suggests that a good flow field distribution can be achieved near the entrance if one inlet was put at the same side of the outlet and the other the opposite side, while the wall was impacted fierce due to the strong turbulence and eddy existed. Finally some advices were given to solve the problem.