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https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012573
2022-12-14T04:02:01Z
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Control of Flow and Heat Transfer Characteristics in an Impinging Jet with Acoustic Excitation
Iio, S
Haneda, Y
Matsubara, Y
Ikeda, T
The experimental study of flow field and heat transfer characteristics of a submerged, rectangular jet impinging normally on a flat plate is presented. Four nozzle-to-surface spacing of H/w=3, 6, 10 and 20 with acoustic excitations was performed experimentally. The forcing Strouhal number is set from St=0.1 to 0.9 at 0.1 intervals. Velocity distributions with two excitation modes, symmetric and asymmetric excitation, are investigated by means of hot-wire measurement. It was found that the basic flow fields changed drastically, while there is little difference of heat transfer characteristic for both the excitation modes. For the short nozzle-to-plate distances, the heat transfer was enhanced in the wall jet region for the excitation of St=0.2. The maximum heat transfer ratio was obtained at the stagnation point for the middle spacing of H/w=6 for St=0.5. It was revealed that the non-periodic velocity component played the most important role in promotion of the heat transfer with acoustic excited impinging jet.
Article
Journal of Fluid Science and Technology. 4(2):304-312 (2009)
日本機械学会
2009
eng
journal article
VoR
http://hdl.handle.net/10091/3095
https://soar-ir.repo.nii.ac.jp/records/12573
https://doi.org/10.1299/jfst.4.304
10.1299/jfst.4.304
1880-5558
Journal of Fluid Science and Technology
4
2
304
312
https://soar-ir.repo.nii.ac.jp/record/12573/files/Control_of_Flow_and_Heat_Transfer_Characteristics_in_an_Impinging_Jet_with_Acoustic_Excitation.pdf
application/pdf
1.0 MB
2015-09-28