Flow field and thermal behaviour in swirling and non-swirling turbulent impinging jets

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• 作者：Zahir U. Ahmed ; ¹ ; ^{zuahmed@our.ecu.edu.au} ; Yasir M. Al-Abdeli ; Ferdinando G. Guzzomi
• 关键词：Turbulent jets ; Swirl ; Impingement ; CFD ; RANS ; Infrared thermography ; Heat transfer
• 刊名：International Journal of Thermal Sciences
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：114
• 期：Complete
• 页码：241-256
• 全文大小：6146 K
• 卷排序：114

文摘

Turbulent swirling jets are investigated both experimentally and numerically. Methods used: CTA, infrared thermography, CFD (RANS, SST k-ω). Flow field turbulence strongly affects the impingement heat transfer distribution. Strongly swirling jets can yield higher Nu for near-field impingement (H = 2D). Non- or weakly-swirling jets yield better Nu in far-field impingement (H = 6D).