VORTEX GENERATION IN FLOWS PAST DIFFERENTIALLY DIMPLED SURFACES

被引:3
|
作者
Popov, I. A. [1 ]
Shchelchkov, A. V. [1 ]
Ryzhkov, D. V. [1 ]
Ul'yanova, R. A. [1 ]
机构
[1] AN Tupolev Kazan State Tech Univ, Kazan 420111, Russia
关键词
heat transfer enhancement; flow regime; dimpled surfaces; vortex generation;
D O I
10.1615/HeatTransRes.v43.i4.10
中图分类号
O414.1 [热力学];
学科分类号
摘要
The results of visualization of vortical water and air flows past surfaces with various dimples (trench-like, semispherical, and cylindrical) for heat transfer intensification in laminar, transient, and turbulent regimes are presented. Flows past single dimples and their systems were investigated. Various methods of visualization were used such as smoke, the carbon oil, and coloring admixtures. Flow pictures and flow pattern diagrams on the surfaces with various dimples are given. Comparative results of infra-red investigations of convective heat transfer on surfaces with such intensifiers are presented. The mechanisms underlying heat transfer intensification on such surfaces are defined. Optimum design parameters of such heat transfer intensifiers are recommended.
引用
收藏
页码:285 / 295
页数:11
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