Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics
Full Article - Open Access.
NEAR FIELD STRUCTURE OF TWIN TANDEM INCLINED AND VARIABLY EL-EVATED JETS IN CROSSFLOW
Jets in crossflow are of a high interest since they are central to a variety of indus-trial applications like fuel injectors, smokestacks, cooling of turbine blades and dilution holes in gas turbine combustors. The present work aims at performing an extensive exploration of the field generated by double tandem jets interacting with an oncoming crossflow. The jets are inclined (60°) and variably but similarly elevated as discharged from nozzles whose height varied between 0 and 5 cm. The jet nozzles discharge a characteristic industrial fume under a temperature gradient of 100 K with reference to the surrounding atmosphere temperature. Consideration is given to a steady, three-dimensional, incompressible and turbulent flow. The resolution of the different conservation law equations is carried out by means of the Compu-tational Fluid Dynamics (CFD) software, Fluent, together with the Reynolds Stress Model and a non uniform grid system. Once validation towards previous experimental data reached, emphasis was particularly giv-en to the induced interactions, namely jet-to jet, jets-to-crossflow and jets-to-jet nozzles inter-actions. Description was carried out in terms of the developed vortical structures, the estab-lished streamlines and further dynamic features, under an injection ratio R equal to 2. Examination was given to the symmetry plane and to different streamwise cross-sections. Such a consideration illustrated decreasing deviation and downstream reattachment of in-creasingly high jets. This issue is of particular interest as deeply involved in pollutants’ dis-persion in urban zones. Its resolution may provide viable solutions for reducing and/or pre-venting from inhabitants’ contamination.
Palavras-chave: twin jets, crossflow, jet elevation, near field, vortical structures,
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Radhouane, A.; Mahjoub, N.; Mhiri, H.; LePalec, G.; Bournot, P.; "NEAR FIELD STRUCTURE OF TWIN TANDEM INCLINED AND VARIABLY EL-EVATED JETS IN CROSSFLOW", p. 3847-3860 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1].
São Paulo: Blucher,
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-19610
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