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Communication Dans Un Congrès Année : 2013

Numerical study of the interaction of multiple swirling jets mounted with unbalanced positions

Ali Khelil
  • Fonction : Auteur

Résumé

The objective of this study is to examine the influence of various parameters on the optimization of various blowing configurations of multiple swirling jets experimentally and numerically. This study show that the number of vanes and their inclination of the diffuser, the sense of rotation of peripheral jets relative to the central jet and their arrangement in temperatures and positions, affects the quality of the thermal homogenization of ambiance. Experiences concerning the interaction of several jets show that the resulting jet is clearly more homogenized under swirling influence. Among the studied different configuration, the one which consists of a swirling central jet controlling the behavior of tow swirling jets in counter-rotation, is shown to be the most effective in terms of thermal homogenization. The current study is carried out under uniform heat flux condition for each diffuser, the air being the working fluid and flow rate was adjusted at the Reynolds numbers Re0= 3.104. In this work, the three dimensional simulations have been carried out using the finite volume CFD solver Fluent, in which the standard k-e , k-e R.N.G and the Reynolds stress turbulence model (RSM) were used for turbulence computations. Overall predictions obtained with the RSM model are in better agreement with the experimental data compared to those of the standard k-e model. The analysis of the flow features clearly demonstrate that the interaction between swirling jets induces the redistribution of temperature in the mixing zone, while allowing the spreading of the resulting jet. It appears that the central jet plays an important role in the enhancement of the thermal homogenization. The findings of this study show that a balance and an imbalance in temperature and position between the central and peripheral jets, affect the quality of the thermal homogenization of the ambiance.

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Dates et versions

hal-03441334 , version 1 (22-11-2021)

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  • HAL Id : hal-03441334 , version 1

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Ali Khelil. Numerical study of the interaction of multiple swirling jets mounted with unbalanced positions. CFM 2013 - 21ème Congrès Français de Mécanique, Aug 2013, Bordeaux, France. ⟨hal-03441334⟩

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