• KAUST Research Conference: Combustion in Extreme Conditions

KAUST Research Conference
Combustion in Extreme Conditions

March 5-8, 2018

AgendaTalk Details

Transported Joint PDF Simulations Combined with Spray Flamelet Modeling of Turbulent Spray Combustion

09:00 - 09:30 KAUST

Level 0 lecture hall between Al-Jazri and Al-Kindi (buildings 4 and 5)

Abstract

The presentation concerns modeling strategies for the simulation of turbulent spray combustion with emphasis on the interaction of evaporation, turbulent mixing and chemical reactions. For this purpose, the classical flamelet model for gas flames has been extended to account for the spray evaporation within the laminar spray flamelets.  Moreover, the spray flamelet model for non-premixed combustion is extended to include (partially) premixed spray combustion. The inclusion of the laminar flamelets into turbulent spray simulations requires the formulation and solution of (joint) transported probability density functions (PDFs), which is also addressed in the presentation. In particular, the commonly used b-function for the turbulent mixing in gas flames is extended to a four-parameter function to account for spray evaporation in spray combustion processes. Simulation results for both non-reacting and reacting spray flows are presented and evaluated within the framework of Assaad Masri's well-established experimental data set for turbulent non-reacting and reacting spray flows for both acetone spray flows and ethanol spray flames. ​