• KAUST Research Conference: Combustion in Extreme Conditions

KAUST Research Conference
Combustion in Extreme Conditions

March 5-8, 2018

AgendaTalk Details

Large Eddy Simulations of Turbulent Flames at High Pressures

14:00 - 14:30 KAUST

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

​Abstract

While high pressure combustion devices are relatively mature technologies, the complex interplay of various phenomena occurring in such devices is not fully understood. To gain insights into the characteristics of turbulent flames at high pressures and Reynolds numbers, synergistic experimental and computational efforts have been undertaken recently at the KAUST Clean Combustion Research Center (CCRC). In this research work, the influence of increasing pressure on non-premixed syngas/air turbulent jet flames is numerically investigated using large eddy simulations (LES) in conjunction with a steady laminar flamelet approach. The applicability of the steady flamelet approach is assessed through an extensive parametric study of laminar counterflow flames and tangential stretching rate analysis on target flame structures at different pressures. Two sets of LES computations, exploring pressure values up to 12 atm, are carried out. The first one  is characterized by a constant jet Reynolds number, whereas the second one is characterized by a constant jet inlet velocity. In the presentation, the results from the LES computations will be discussed and contrasted with measurements from the experiments conducted at the High-Pressure Combustion Duct (HPCD) of CCRC, and the major findings will be highlighted.