Model and Measure of Flows at the Intake of Engines

(Received 10 March 1997, revised 4 June 1997, accepted 23 June 1997)

Abstract
A simple physical model is developed to simulate the annular dispersed multiphase flow observed at the intake of spark ignition port-injected engines. The model is a separate phase 2D model taking into account gas, droplets and liquid film phases. It is validated by the results of different measurements made on engine. Temperature, pressure and velocity measurements are made in the intake manifold of a production engine in order to characterize the flows of gaseous phases. Velocity measurements are also made for injected fuel droplets. Global equivalence ratio measurements are made to validate modeling of deposited fuel film on manifold walls.