Publication Type : Journal Article
Publisher : Journal of Thermal Science and Engineering Applications, American Society of Mechanical Engineers Digital Collection,
Source : Journal of Thermal Science and Engineering Applications, American Society of Mechanical Engineers Digital Collection, Volume 12, Issue 3 (2020)
Url : https://asmedigitalcollection.asme.org/thermalscienceapplication/article-abstract/12/3/031021/1072636
Keywords : CFD, co-and-counter, combustion and reactive flows, Forced convection, Heat transfer enhancement, impingement, Interactions, Swirl
Campus : Coimbatore
School : School of Engineering
Department : Mechanical Engineering
Year : 2020
Abstract : Swirling impinging flame jets possess the potential of uniformly heating the target surface. Numerical simulations have been carried out for multiple reacting swirling flows arranged in square 3 × 3 array. The turbulence chemistry interactions in the flow field are modeled using RNG based k-ε/ eddy dissipation model (EDM) framework. Co-and-counterrotating configurations have been compared for interactions and spent gas release mechanism at fixed inter-jet spacing and separation distance. Multiple swirling impinging flames undergo strong interactions resulting in distortions of recirculation zones (RCZs) for all the surrounding but central flame. Co-swirling flames result in development of higher turbulence in the interaction regions as compared with counter-swirl case. Tilted heat flux contours have been noticed for co-swirling impinging flames, whereas heat flux impressions are straight for counter-swirl case. Effect of inter-jet spacing (C/Dh = 5, 7, and 9) and separation distance (H/Dh = 3, 5, 7, and 9) studied for co-swirl case revealed that peak heat fluxes decreased with increasing inter-jet spacing and separation distance. With increase in inter-jet spacing, the width of central flame increased due to increased suppression effect induced by the recirculating gases. Increase in separation distance resulted in decrease of width of central flame and thermal dilution taking place led to decrease in heat flux magnitudes.
Cite this Research Publication : P. Singh, Dr. Ratna Kishore V., and Chander, S., “A Numerical Investigation on Fluid Dynamics and Heating Characteristics of Co-and-Counterrotating Multiple Swirling Impinging Flames Arranged in 3$\times$ 3 Inline Array”, Journal of Thermal Science and Engineering Applications, vol. 12, no. 3, 2020.
