振動片挿入による円管内熱伝達促進

概要

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This paper shows how the heat transfer coefficients along a heated tube are affected by the ratio of the first plate to the second plate of oscillating plates of various types which are oscillating by an internal flow in a circular tube is inserted at the inlet in order to augment heat transfer along the tube wall. The heat transfer performance was evaluated under the condition of a fixed pumping power, and it was found that the performance ratio, η, for the entrance region attainded the maximum at λ^<1/3>Re= 8 x 10^3 and became 1.5, for fully developed turbulent region took nearly one, because the oscillating plate could not be set closer to the tube wall and Strouhal number was very small.
琉球大学工学部の論文
1991-09-00