层板模型流阻特性的研究

Study for flow resistance characteristics of the modelled laminated porous wall

关键词:  航空发动机  多层板  多孔板  冷却  流体阻力

Key words:  Aircraft engine  Multilayer board  Porous plate  Cooling  Fluid drag

摘要:

设计了不同内部流动结构的单、双层多孔层板 ,并针对这些层板在吸气式风洞上进行了流阻实验 ,得出了绕流柱形式、开孔率、孔间距、绕流柱高度以及单、双等敏感因素对层板流阻特性的影响 :方形扰流柱阻力最小 ,圆形次之 ,菱形阻力最大 ;开孔率越大 ,孔间距越小 ,流阻越小 ;扰流柱越高 ,流阻越小 ;双层扰流柱的层板阻力明显高于单层扰流柱。

Abstract:

Some laminated porous walls with different internal configuration were designed. Based on the several experiments, this paper made an investigation on the effects such as the number of holes, the shape of the fin elements, the grid depth, single layer lamilloy and double layer lamilloy on the flow resistance. Some practical conclusions are drawn. The more the holes are, the lower the pressure loss will be. The larger the hole space is, the lower the pressure loss will be. The present results also indicate that the cube element yields the lowest pressure loss, followed by circular pin-fin and diamond. The higher the grid depth is, the lower the pressure loss will be. The double layer lamilloy represents higher pressure loss than the single layer lamilloy.