218301 水平矩形流路内のスワール型複合対流熱伝達に及ぼす流路断面縦横比の影響(一般04 熱力学・熱工学2)

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In this study, effects of aspect ratio on mixed convective heat transfer in horizontal rectangular duct were examined numerically and experimentally. The working fluid was water. As thermal boundary conditions, the upper and the bottom walls were insulated thermally and the side walls were heated and cooled walls respectively in the heat transfer section. In the numerical analysis, the fluid flow and the temperature distributions for Ri=1.61, Pr-6.99, Re=100, and aspect ratio, A_r=0.2〜10, were obtained by solving non-dimensional governing equations using SIMPLE procedure. QUICK scheme was applied to convection term of these equations. In the experimental analysis, the flow behavior for A_r=0.5〜2 was visualized by dye-injection method. Numerical results show that the swirl flow was generated along the flow direction, and its pitch length was influenced with A_r. The pitch length was shortest in A_r=0.5〜1, and this tendency was the same in numerical results and experimental results. The heat transfer behavior was discussed corresponding to flow.
一般社団法人日本機械学会の論文
2011-03-17