Analysis of Unsteady Flow Through a Throttle Valve Using CFD

Abstract

In automotive application, modelling of the various singularities in pipe systems still remain challenging. The aim of this study is to develop a new throttle valve model which can be included in a one dimensional engine simulation code. First, experimental study was conducted to evaluate an existing literature model, and results show drawbacks in this model. Then after a new model was developed based on the experimental study and CFD analysis, with the throttle valve modeled as a function of flow characteristics and geometrical parameters. After including the new model in the engine simulation code, the engine performance at partial load was determined and results show good agreement with the experimental study.

Keywords:

• gas dynamics
• pressure waves propagation
• unsteady flow
• one-dimensional approach
• internal combustion engine
• CFD simulation