D212 垂直加熱平板まわりの強制-自然対向流共存対流の流動と伝熱 : 水の場合(OS-2:複合対流)

概要

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Experimental investigations have been carried out on opposing mixed convection of water around a heated vertical plate. The length of the plate is 50 mm. The plate is heated with a constant heat flux. The experiments cover the ranges of Reynolds and modified Rayleigh numbers as; 4×10^2<Re_L<2×10^3, 4×10^7<Ra_L^*<3×10^9.The flow fields around the plate were visualized with dye. The result shows that a separation of the boundary layer flow appears first at the trailing edge of the plate when the non-dimensional parameter (Gr_L^*/Re_L^<2.5>)=0.4 and the separation point reaches to the leading edge when (Gr_L^*/Re_<L<2.5>)=3. Moreover, the local heat transfer coefficients of the plates were measured. The results show that the heat transfer is not coincided with that of the pure forced convection by the above flow separation.
一般社団法人日本機械学会の論文
2011-10-28