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采用传热传质类比方法 ,对冲击加多斜孔双层壁冷却方式气膜绝热温比进行了实验研究。主要考虑了双层壁夹缝高度、冲击壁、吹风比、孔排列方式、以及孔间距对局部绝热温比的影响。并且给出了根据 5种几何结构实验板的展向平均绝热温比沿流向的分布运用最小二乘法拟合公式。研究结果表明 :对某一确定几何结构的多斜孔实验板 ,加冲击壁与否以及双层壁间夹缝高度的变化对相同吹风比下的绝热温比影响甚小 ,局部绝热温比的分布主要取决于吹风比和孔阵排列方式。从绝热温比考虑 ,叉排长菱形排布比较理想。
The method of heat and mass transfer analogy was used to study the temperature ratio of gas film adiabatic in the double-wall cooling with impact and multi-inclined holes. Mainly considering the double-wall crack height, impact wall, hair blowing ratio, hole arrangement, and the hole spacing on the local insulation temperature ratio. And according to the distribution of the average adiabatic temperature-span ratio of the five kinds of geometrical structure experiment boards, the least-squares fitting formula is given. The results show that the change of the temperature of the adiabatic temperature at the same blow ratio is little affected by the increase of the impact wall and the impact wall or not, and the distribution of the local adiabatic temperature ratio Mainly depends on the hair blowing ratio and array arrangement. Considered from the adiabatic temperature ratio, fork row long diamond arrangement ideal.