Thermal Loads Analysis Of 6100 Diesel Engine Block

Diesel engine has been widely applied in various fields, because of its powerful torque, high thermal efficiency and good durability. With the increase of the intensification coefficient of vehicle diesel engine, engine block, cylinder liner, cylinder head and other heated parts of engine are subjected heavier thermal loads. Any mistakes on design or manufacturing can lead to damages of engine block, cylinder head and other heated parts of engine, such as cracks on block and cylinder head. So it is great significant to analyze the thermal loads of engine block, cylinder liner, cylinder head and other heated parts of engine.The thermal loads of 6100 diesel engine block were researched with the method of heat- fluid -solid coupling in this article. 3-D geometric models of block and liners were established on the platform of Pro/E Wildfire 3.0, and the models were reasonably simplified. The modles of block and liners were transmitted to ANSYS. The geometric model of water jacket was established by Boolean operation in ANSYS, and then the block-liner-water jacket coupling model was built in ANSYS. The coupling model was automatically meshed using FLUID 142 element in ANSYS. The results of flow field of water jacket and temperature fields of block, liners and water jacket were obtained after FLOTRAN solution with the method of heat- fluid -solid coupling. The improvement suggestions on water jacket structure were given after analysis of the solution results. And then the improved coupling model was established in ANSYS and the same thermal boundary conditions, flow boundary conditions and fluid properties were applied to the model. The results of flow field of improved water jacket and temperature fields of improved block, liners, water jacket were obtained after FLOTRAN solution. The results showed that the cooling effects of block and liners became more balanced by the improvement of structure of the water jacket. And the overheating areas also disappeared. The improvement of structure of the water jacket was very successful.