Flow structures and heat transfer are investigated experimentally in an excited circular impinging jet with small nozzle-lo-plate spacing (H/D less than or equal to 2). The local heat transfer in the wall-jet region is found to be sensitive to the excitation frequency. Enhancement and reduction of the local heat transfer in the wall-jet region can be attained by forcing the impinging jet near the natural frequency and its subharmonic, respectively. The relationship between the vortical structures and local hear transfer is studied by the means of flow visualization, heat transfer spectra and correlation between velocity and heat transfer. Copyright (C) 1996 Elsevier Science Ltd.
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Prince Songkla Univ, Energy Technol Res Ctr, Hat Yai 90112, Songkhla, Thailand
Prince Songkla Univ, Dept Mech Engn, Fac Engn, Hat Yai 90112, Songkhla, ThailandPrince Songkla Univ, Energy Technol Res Ctr, Hat Yai 90112, Songkhla, Thailand
Nuntadusit, C.
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Wae-hayee, M.
Bunyajitradulya, A.
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Chulalongkorn Univ, Dept Mech Engn, Fac Engn, Bangkok 10330, ThailandPrince Songkla Univ, Energy Technol Res Ctr, Hat Yai 90112, Songkhla, Thailand
Bunyajitradulya, A.
Eiamsa-ard, S.
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Mahanakorn Univ Technol, Dept Mech Engn, Fac Engn, Bangkok 10530, ThailandPrince Songkla Univ, Energy Technol Res Ctr, Hat Yai 90112, Songkhla, Thailand
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Indian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, IndiaIndian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, India
V. Chandra, Premchand
Panda, Pratikash P.
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Indian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, India
Indian Inst Sci, Dept Aerosp Engn, Bangalore 560012, IndiaIndian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, India
Panda, Pratikash P.
Dutta, Pradip
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Indian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, India
Indian Inst Sci, Dept Mech Engn, Bangalore 560012, IndiaIndian Inst Sci, Interdisciplinary Ctr Energy Res, Bangalore 560012, India