ID 326

An Assessment of Turbulence Models for Atomization in a Jet in Cross Flow Configuration

 

Abstract:

Lean combustion systems are being developed by gas turbine manufacturers to reduce the NOx generation and to meet the stringent emission standards of the future. The combustor's efficiency depends on fuel injection, liquid atomization, primary and secondary breakup of jet, dispersion and evaporation of the droplets. Jet in crossflow (JICF) is a widely studied topic due to its appropriateness in modelling the atomization process in this scenario. Hence, it is important to investigate the JICF configuration to obtain a better understanding of the physics involved. At realistic Reynolds numbers, the JICF configuration has different turbulent scales and flow structures. From a computational modeling perspective, it is imperative to resolve such scales and structures to obtain a true predictive capability. High-fidelity CFD turbulence modeling approaches like Direct Numerical Simulation (DNS) and Large-Eddy Simulation (LES) can enable to achieve such goals but at a higher computational cost. On the other hand, widely used Reynolds-averaged Navier–Stokes (RANS) solutions may lack required details in the solution. The objective of this study is to compare the predictive capabilities of different turbulence models for a JICF configuration using OpenFOAM CFD software