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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2008년도 추계학술대회
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    초록·키워드

    The Visualizations of the flowfield through tube banks with in-line and staggered arrangements were investigated by PlV. Strouhal numbers, velocity vectors and velocity profiles around the cylinders with in-line and staggered arrangements were observed at the pitch ratio P<SUB>t</SUB>/D=2.0 and Reynolds number of Re=4.0×10³. As the results The flow patterns through tube banks were almost a straight line in case of the in-line arrangement while it was almost 八 type in case of the staggered arrangement in the direction of the wake. The average velocity in the rear region of the tube banks with the staggered arrangement was far smaller than that with the in-line arrangement. The Strouhal number in the last rank was far smaller than that in the front ranks in both of the in-line and staggered arrangements. The wake of each cylinder changed with time and with the position of the cylinder.

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