Wang Zhaowen

Computational Fluid Dynamics Technology Applied in Flow Analysis in Diesel Engine's Cooling Water Jacket

Using computational fluid dynamics software, the fluid flow in cooling water jacket of HPD diesel engine is studied. Results show that all parts in A Row cylinders cooling water jacket have a better cooling effect, such as in cylinder block and in fire deck. And cooling effect for each cylinder is uniform. Total pressure loss through cooling water jacket is 32.6kPa. The size of water up-holes is better for cooling cylinder head, which can also provide boundary conditions for further calculating temperature field of cylinder head.

Study on Solid-Fluid Coupled Heat Transfer Simulation of Cylinder Head of High Power Density Diesel Engine

On the base of three-dimensional model of HPD diesel engine cooling system water jacket and cylinder head, using Fire mesh module of the AVL software, the grid models were built up, the interface of the head and inner water jacket was coupled. Dependent on boundary conditions simulated on the grid model of cooling system water jacket, using the method of dispersing and resolving, the coupled grid model was calculated and the temperature of the cylinder head was obtained under the condition of rated speed and power. The simulating results are well matched with the experimental results, which can provide gist for further calculating thermal stress and thermal crack.