加熱回転円板上の共存対流領域における非定常流動機構(熱工学,内燃機関,動力など)

概要

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The flow field under a mixed convection on the heated rotating disk has been measured using ultrasonic velocity profiler (UVP). The measured velocity field is a spatio-temporal one as a function of a radial coordinate and time. The objective of this paper is to clarify a vortex structure caused by instability between the buoyancy and centrifugal force. The vortex appears under typical Reynolds numbers and Grashof numbers and it moves toward outside of the disk. This behavior can be classified into two patterns. The size of the vortex structure decreases with increase in Reynolds number and increases with Grashof number. The traveling velocity of the vortex increases with Grashof number and decreases with increase in Reynolds number in spite of increase of centrifugal force. According of these results, the region dominated by natural, forced and mixed convection is classified in the relationship between Reynolds and Grashof number.
社団法人日本機械学会の論文
2004-09-25