Effect of Interactions on Flow Field and Heat Transfer Characteristics for Three Corotating Dual Swirling Flames Impinging on a Flat Surface. Issue 4 (2nd April 2020)

• Record Type: Journal Article
• Authors: Singh, Parampreet; Chander, Subhash
• Is Part Of: Combustion science and technology. Volume 192:Issue 4(2020)
• Page Start: 701
• Page End: 727
• Publication Date: 2020-04-02
• Subjects: Multiple swirling flames -- impingement heat transfer -- interactions -- distorted RCZ -- thermal imaging; Combustion -- Periodicals; Combustion engineering -- Periodicals; 541.36105
• DOI: 10.1080/00102202.2019.1593155
• Languages: English
• ISSNs: 0010-2202

Abstract

ABSTRACT: Detailed flow field and heat transfer characteristics of an array of three corotating dual swirling impinging flames arranged in a triangular configuration have been investigated experimentally as well as numerically. Effect of varying separation distance and inter-jet spacing on interactions and impingement heat transfer has been studied at fixed Reynolds numbers under stoichiometric conditions. Adjacent co-swirling flames developed strong interactions resulting in high heat transfer due to increased mixing and turbulence. Bending of inner non-swirling flames takes place toward geometric center of the array due to asymmetric interactions. Numerical simulation also predicted asymmetric interactions resulting in the formation of large distorted recirculation bubble in each dual-swirling flame. Interacting co-swirling flames resulted in the formation of circulating patterns of flow at the geometric center of array. The effect of inter-jet spacing on average heat flux is observed to be more significant than separation distance.