ID 90

Primary atomization simulation applied to a jet in crossflow aeronautical injector with dynamic mesh adaptation

 

Abstract:

Designing atomizer is currently one of the most challenging task in aeronautical combustor. Atomizer characteristics plays an important role on the combustor performances, among others: atomization process, flame structure, combustor operability, pollutants and particles emission level. However, its design is particularly difficult due to i) highly non-linear phenomena of atomization and ii) difficulty to have detailed measurements of atomizer in swirler in situ.

Until today, the ability of unsteady 3D modeling to predict accurately the atomization process was a difficult and a costly task unreachable for industrial applications. Recent developments proposed by Bénard et al. [IJNMF 2015] of parallel mesh adaptation in the YALES2 solver based on the MMG library [Dapogny et al. 2014 ; Dobrzynski and Frey 2008] is an enabling technology, which has the potential to reduce dramatically the cost of such simulations in an industrial context.

Case application proposed in the present paper is a jet in cross flow configuration which can be found in multi-point aeronautical combustor. The test case is based on Raggucci et al. experiments [Atomization and Sprays, 2007]. The study proposes both qualitative and quantitative analysis over fuel flow and numerical results are compared with experiments.