Application of LES/PDF and RANS/PDF approaches for simulation of spray combustion | ||
| Al-Qadisiyah Journal for Engineering Sciences | ||
| Volume 14, Issue 2, June 2021, Pages 104-111 PDF (759.21 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.30772/qjes.v14i2.752 | ||
| Authors | ||
| Duaa Yaseen Haran* ; Ahmed Abed AL-Kadhem Majhool | ||
| Department of Mechanical Engineering, Collage of Engineering, University of Al-Qadisiyah, Ad-Diwaniyah, Iraq. | ||
| Abstract | ||
| This paper is addressing of a coupling Large-eddy simulation (LES) and RANS turbulence models with mixture fraction/probability density function as a combustion model. The two models have been implemented to simulate ethanol-air spray combustion. The gas phase is described with the Eulerian approach while the liquid phase is designed using a Lagrangian framework. The LES/PDF approach is obtained statistically. The sub-grid scale energy equation is used with the LES/PDF approach. The numerical results are validated with experimental data. Both LES/PDF and RANS/PDF approaches are compared with the experimental data. The LES/PDF approach shows a good agreement in predicting the average gas temperature compared with RANS/PDF approach. The LES/PDF shows a better prediction of both turbulence intensity profiles and the vortices which are generated in the turbulent flow in comparison with the RANS/PDF approach. | ||
| Keywords | ||
| Spray combustion; Eulerian/Lagrangian; Turbulence model; Fluent | ||
|
Statistics Article View: 25 PDF Download: 35 |
||