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Title :長方形翼対の渦発生体による流路内熱伝達促進
Title alternative :Heat Transfer Enhancement by Vortex Generators Consisting of Rectangular Blades Insertion in a Duct
Authors :親川, 兼勇
瀬名波, 出
Authors alternative :Oyakawa, Kenyu
Senaha, Izuru
Issue Date :25-Jan-1999
Abstract :A quantitative estimate of heat transfer enhancement is discussed here based on the measuements of local coefficients of heat transfer and friction for air flow over a range of Reynolds number from Re=9400 to 28200. Pairs of vortex generators consisting of two rectangular blades, increasing linearly in separation downstream, are aligned laterally to the flow with a spacing W. Characteristics of spanwise local heat transfer and pressure coefficients are found to vary differently over two regions of W. For small W, the phase of their distribution is shifted by 180° from the patterns observed just downstream of the blades. For large W, no phase change is observed but changes of the pattern between paired blades are distinctive. Overall heat transfer coefficients are more than double those for a smooth duct without generators. As a result, the performance ratio is greater than unity for all values of W.
Type Local :雑誌掲載論文
ISSN :03875016
Publisher :日本機械学会
URI :http://hdl.handle.net/20.500.12000/238
Citation :日本機械学会論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B Vol.65 no.629 p.289 -295
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

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