Highly-resolved large eddy simulation of the nonreacting flow in an asymmetric vortex combustor

• Main Authors: Saqr, Khalid M., Abdul Wahid, Mazlan, Mohd. Sies, Mohsin
• Format: Book Section
• Published: American Institute of Physics 2012
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://eprints.utm.my/id/eprint/35799/; http://dx.doi.org/10.1063/1.4704242

In this paper, we present a computational investigation of the nonreacting flow structure inside a novel asymmetric vortex combustor that was recently proposed by the authors. Large Eddy Simulation using the Smagorinsky-Lilly subgrid turbulence closure has been used to study such flow. A computational grid of 2.22×106 cells was used to ensure that the resolved turbulence kinetic energy is fairly more than 80% of the total turbulence kinetic energy budget. The flow was found to exhibit a central recirculation zone, and two secondary recirculation zones in the asymmetry regions. The vortex structure was found to be a completely forced vortex field. The effect of turbulence on the size and structure of the statistically averaged mean flow phenomena has been analyzed as discussed.