The research program on combustion developed by Renault
Vehicules Industriels in the scope of their Advanced Research Plan
has resulted in implementation of very efficient calculation and
analysis means for better understanding of combustion phenomenon as
well as for speeding up engine development.
Major means implemented are:
.A Code for combustion analysis by going through instant
measurement recorded on engine by data retrieval
.A Code for simulating fuel spray penetration based on an
assumption of air entrainment allowing to visualize spray path
within the chamber and to know the entrained airflow and the
species within the spray.
Calibrated on long lasting test campaigns on single and
multicylinder engines, this work resulted in development of
combustion simulation phenomenological models, taking into account
heterogeneity of temperatures and concentrations.
These models are already predictive ones as regards performance
and heat transfer, and allow to take up simulation of gaseous
emissions formation (hydrocarbons, nitrogen oxides and smokes).