【摘要】 <正> 现代先进航空发动机涡轮叶片一般采用冲击+对流+气膜复合冷却方法,叶片构造愈来愈复杂,冷气量也愈用愈大。为了进一步提高涡轮进口温度,应该寻求新的冷却途径。本文建议采用强化叶片的内冷过程和利用添加剂减弱燃气向叶片放热两措施来改善冷却。下面分别叙述这些措施的依据和对斯贝MK202发动机一级导叶的温度计算。更多还原

【Abstract】 In this paper the methods of augmentation of convective heat transfer in the cooling channels of the vane with rough surface and formation of the dynamic coating on the airfoil surface in virtue of silicone additives in the fuel were suggested. By means of these could be raised the turbine inlet gas temperature to 1600 K when coolant to gas flow ratio is equal to 0.03-0.04.更多还原