席壁冷却结构的无因次温差比η和θ的实验研究

EXPERIMENTAL INVESTIGATIONS ON DIMENSIONLESS TEM PERATURE DIFFERENCE RATIO η AND θ OF MAT-WALL COOLING STRUCTURE

对席壁冷却结构的平板实验件进行热态实验研究，测定反映该冷却结构冷却效果的两个无因次温差比η和θ的大小随冷却密流ｍａｎ／Ａ平板的变化规律，一方面以检验本席壁结构的冷却效果。

The values of the dimensionless temperature difference ratio η and θ depend on the thermal conductivity of multiple-duct wall,coolant mass flow per unit surface area and geometrical structure of the multiple-hole base.The values of η and θ demonstrate the cooling effect of a cooling structure to a certain extent. Hot state experimental investigation on a piece of experimental plate of mat-wall cooling structure has been done,and the values of η and θ and their variation with the cooling density flow that display the cooling effect of the cooling structure have been determined. The cooling effect of the mat-wall structure can be examined, which can offer support for seven-heat-flow wall temperature calculation.