Model and Measure of Flows at the Intake of Engines

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

Spray Atomization Models in Engine Applications, from Correlations to Direct Numerical Simulations

“…Imaging is obtained through LIF of spray droplets with a four-hole injector (d o = 0.2 mm) in a pressure vessel using iso-octane doped with fluoranthene as described in work by Le Moyne et al (1997). Only one of the 4 sprays is correctly illuminated by the laser sheet intersecting it in its axis.…”