In order to study spray combustion, an experimental test rig was developed at ONERA partially characterize the flow conditions inside combustion chamber of a gas turbine. Experimental campaigns using laser-based diagnostics were performed provide database under reacting and non-reacting conditions. The paper first describes Mie scattering image-processing detect droplets in spray, calculate 2D ...

A prediction method, known as the Coupled Time Scale (CTS) is proposed in current work to estimate ignition delay time (IDT) of liquid spray combustion by only performing an inert simulation and a zero-dimensional (0-D) homogeneous reactor (HR) simulation. The method built upon assumption that if majority vapor regions has composition close most reactive mixture fraction, which can be obtained ...

• A task-based parallel Eulerian-Lagrangian framework. Asynchronous multi-physics for reacting flows with spray. Parallel load balanced simulation of combustors swirl injectors. Excellent efficiency applications large particle count and highly non-uniform distribution. An asynchronous approach efficient simulations that can scale arbitrary number particles non-uniformly distributed is presented...

 Flash Boiling atomization is one of the most effective means of generating a fine and narrow-dispersed spray. Unless its complexity its potential has not been fully realized. In This Paper, a three dimensional chamber has been modeled with a straight fuel injector. Effect of Flash Boiling has been investigated by computational fluid dynamics (CFD) techniques. A finite volume approach with the ...

A computational optimization was performed for a direct-injection diesel engine using three-dimensional modeling. Fully transient CFD analyses of different valve profile strategies for the intake and compression strokes were performed to evaluate the effects on both engine performance and in-cylinder flow-field evolution. The turbulence model was used along with the second order linear upwin...

The combustion processes and emission formation in pre and main chambers of a Lister 8.1 IDI diesel are simulated with the Computational Fluid Dynamics (CFD) code. The model includes spray atomization, mixture formation and distribution and subsequently the combustion processes and emissions formation modeling are carried out with considering of flow configurations in two chambers. A part load ...