G0601-3-3 水平加熱正方形柱まわりの自然対流の流動と伝熱(熱工学(3)伝熱(3))

概要

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Experimental investigation has been carried out on natural convection of water induced around heated, horizontal square cylinders. Main concerns were the flow and heat transfer characteristics of high-Rayleigh number flows. The flows around the square cylinder and the surface temperatures were visualized with dye and liquid crystal thermometry, respectively. The results showed that the ascending flows along the vertical side surface begin to separate three-dimensionally from the upper surface of the square cylinder when the modified Rayleigh numbers, Ra^*_d, exceed Ra^*_d =2×10^6. The local heat transfer coefficients were also measured. The results showed that the coefficients of the upper surface are increased, in particular, in the region behind the three-dimensional separation.
社団法人日本機械学会の論文
2009-09-12