3D COLD FOLLOW SIMULATION INSIDE INTAKE MANIFOLD AND CYLINDER OF AN IC ENGINE

Abstract

This paper presents 3D cold follow simulation inside the intake manifold, valves and cylinders of the engine which has two cylinders with two valves in each, and a compression ratio of 10.7. The purpose of this study is to analyze the change in the cylinders in terms of temperature, pressure and velocity depending on crank angle degree for 300 K and 450 intake temperatures. This is, particularly, important for a controlled auto ignition (CAI) engine which has sensitive to temperature distribution and pressure for combustion development in cylinders. In this study, the engine model based on the real dimension of Lombardini LGW523 engine was structured and then meshed for follow fields. Fluent CFD code which uses finite volume method was used as an analysis tool. 3D Pressure based Implicit unsteady solver was used to solve the basic governing equations (mass, momentum and energy). RNG k-ε turbulence model was used to simulate the turbulence follow in the cylinders. The analyses in this study were carried out for four strokes of the engine using dynamic mesh. As a result, in cylinder temperature, pressure and velocity distribution were obtained with change in crank angle positions and compared for two different intake temperature.

Keywords

• Cold flow simulation, Spark Ignition Engine, Intake manifold, Cylinder Pressure