Research Based on CFD for Helical Intake Port Position Defect of Diesel Engines

This paper realized the 3-dimension model for helical intake port and simulated the different kinds of position deviations by the application of reverse engineering. The three-dimensional flow field in port-cylinder was numerically simulated by the use of CFD software FIRE to verify how the position deviations affect the performance of the helical intake port. The result shows that the slanting and translational position deviations have the marked effect on the swirl ratio of the helical intake port and the strict control of production precision is needed.

Research of Finite Element Simulation for Diesel Intake Port

In this paper, we study how the geometry of helical intake port of diesel engine influent air flowing conditions to reduce the complexity and difficulty of getting air flowing conditions by experiments. In numerical modeling, we import model of intake port into ANSYS software and do mesh processing on intake port in sections. We then analyze air flow based on working conditions, including difference of pressure between intake and exhaust port and lift-range. We deal with data by post-processing module in ANSYS and obtain velocity distribution and turbulence energy distribution of intake and exhaust port. Finally, we can predict the performance of intake port and find optimizations theoretically.