Flow studies on increasing the efficiency of the inlet manifold

Abstract

The current study focuses on improving the flow of air through the inlet manifold. With using CFD software, the phenomena occurring within the pipeline are studied. Modification of the intake results in an increase in the air mass flow, and thus in the increase of the engine performance. The air flow rate allowed at the boundary layer between the duct and the air tends to be zero. The high-rugged surface increases the flow velocity in the center of the tube. In this paper, the effect of a rough surface created by dimples in the intake pipe is studied. By applying small dimples to the surface of the piping, the velocity distribution becomes more uniform within the tube. Dimples cause lowering pressure at the start, thus increasing the air flow rate. The limit layer that has low flow rates relative to the speed at the center of the tube becomes thinner. By applying this method, the air flow rate in the intake manifold can be improved.