Research Based On CAD/CFD For Helical Intake Port Of Direct Injection Diesel Engine

This paper has a research on the helical intake port of direct injection diesel engine. Computer aided design (CAD) and computer fluid dynamics (CFD) methods are applied on the proto type copying and design of helical intake port. The main purposes of this paper are:1. Set up one helical intake port model by reverse engineering.2. Analysis the key geometry parameters of helical intake port modeling. A parametric three-dimensional model is achieved by interaction. And a computer aided parametric design system is set up. To some extent, the purpose of automated modeling is reached.3. Perform fluid simulation on the helical intake port- valve- cylinder flow field under the condition of steady flow testing rig. The results under different valve lifts are gained.The research of this paper is practically useful. The surface of three-dimensional port model is second-order geometry continuity. The helical intake port modeling computer aided design system can get a parametric model and can fasten the speed of modeling. Finally the fluid simulation is performed. And the results can be the basis for optimizing design of helical intake port.