摘要
通过分析层板燃气侧、内部及冷气侧的换热特性,表明层板内流动特别复杂,换热也具有多样性。冷气侧换热面由于冲击孔出流的抽吸作用导致冲击孔上游换热加强,冲击孔出流对下游换热边界层的破坏,使下游换热同样加强,且比上游增加幅度大。通道底面主要是由于射流形成的漩涡对底面冲击而使换热增强,但影响区域不大。冲击面由于射流的冲击使滞止区换热系数很大,影响的区域也较广。燃气侧换热面由于气膜孔射流对主流的影响使气膜孔下游的主流旋转形成强度很大的漩涡,冲击壁面而使气膜孔下游换热增强,并且两孔之间由于冷气的掺混换热系数较大。
By analyzing heat transference of porous layer and internal as well as side refrigerator demonstrating complicated flow inside and diversity . Refrigeration side transference intensified due to the suction effect causing punching hole upper flow heat transference strengthening. Down- flow caused destruction to the boundary layer. Bottom layer assaulted by flowing ejecting current but affect spot areas. Impact surface formed by jet caused vast regions with considerable quantities of heat transference coefficients . Side panel with gas fueling formed intensive membrane that cause intensive shocking thus affected holes that ultimately leading to both apparent intensity of mixing porous plate with distinct coefficients.
关键词
多孔层板
数值模拟
换热系数
耦合
Porous Plate
Numerical Simulation
Heat Transference Coefficient
Coupling
