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No. 50 (1995/09) >

 
Title :環状噴流による管内熱伝達
Title alternative :Heat Transfer in Duct with Annular Jet
Authors :親川, 兼勇
屋我, 実
瀬名波, 出
Authors alternative :Oyakawa, Kenyu
Yaga, Minoru
Senaha, Izuru
Issue Date :Sep-1995
Abstract :Heat transfer coefficients were measured in the inner wall of a duct with an annular jet. The nozzle exit widths of the annular jets were varied by the change of diameter of the bluff plugs inserted at the duct inlet. The ratios of diameter of the bluff plug to that of the duct were chosen to be d/D=0.6, 0.7, 0.8, 0.85 and 0.9. It is found that there are two regions of d/D where the characteristics of streamwise local heat transfer coefficients vary differently. For small d/D, the heat transfer mechanism depends on the flow field with a high turbulence intensity caused by the violent shear layer flow separated from the edge of the bluff plug. For large one, that depends on a wall jet like flow because the recirculating region formed back of the plug becomes large and makes the flow stable.
Type Local :紀要論文
ISSN :0389-102X
Publisher :琉球大学工学部
URI :http://hdl.handle.net/20.500.12000/9608
Citation :琉球大学工学部紀要 no.50 p.9 -16
Appears in Collections:No. 50 (1995/09)

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