Turbulent heat transfer of natural convection between two vertical parallel plates
Turbulent heat transfer of natural convection between two vertical parallel plates
复制标题
两个垂直平行板之间自然对流的湍流传热
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. Maruyama
中科院分区：
文献类型：
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作者：
T. Inagaki;S. Maruyama
我们测量了在层流区、过渡区和湍流区均匀加热的两个垂直光滑平行板之间的自然对流传热系数。实验研究了垂直平行板间宽度δ、壁面热流密度qw、垂直平行板总水道长度L和加热条件变化时的换热特性。对于垂直平行板间的自然对流，在湍流区，由于联合对流的作用，传热被强烈地抑制。相反，由于隧道效应，层流区域的换热得到加强。这种趋势随着δ的减小和l的增大而明显。在δ一定的情况下，随着qw的增大，传热还原的位置向下游移动。此外，在较小的δ下，我们不能根据层流区域的换热增强和湍流区域的换热减少来清楚地区分过渡过程。©2001 Scripta Technica, Heat Trans Asian Res, 31(1): 56-67, 2002
We measure heat transfer coefficients of natural convection between two vertical smooth parallel plates heated uniformly in the laminar, transition, and turbulent regions. The heat transfer characteristics are experimentally investigated with changing width, δ, between the vertical parallel plates, wall heat flux, qw, overall watercourse length, L,of the vertical parallel plate and heating conditions. For natural convection between the vertical parallel plates, in the turbulent region of , the heat transfer is strongly suppressed owing to the effect of combined convection. On the contrary, the heat transfer in the laminar region is enhanced due to the tunnel effect. These tendencies become pronounced with decreasing δ and increasing L.The location of the heat transfer reduction shifts downstream with increasing qw under a fixed δ. Furthermore, under smaller δ, we cannot clearly distinguish the transition process in accordance with both the heat transfer enhancement in the laminar region and the heat transfer reduction in the turbulent region. © 2001 Scripta Technica, Heat Trans Asian Res, 31(1): 56–67, 2002