【摘要】 对轴对称喷管和一组长宽比分别为1,4,8,12和16的二元喷管进行了红外辐射特性测试实验研究。喷管中的气流由主流燃气和次流空气组成,用以模拟涡扇发动机的喷管。得出了二元喷管的红外辐射强度的空间分布,并且将二元喷管和轴对称喷管的红外辐射强度进行了比较。更多还原

【Abstract】 The infrared radiation characteristics of axisymmetric and 2-D nozzles with aspect ratios of 1,4,8,12 and 16,have been experimentally studied.The nozzle flow is composed of the main gas stream and the secondary air stream in order to simulate the nozzle of turbofan engine.The spatial distributions of the infrared radiation intensity of 2-D nozzles have been obtained,and compared with that of the axially symmetric nozzles.更多还原