两种涡扇发动机排气系统红外辐射特性的比较  

Comparative investigation of the infrared characteristics for two exhaust systems of a turbofan engine

作　　者：额日其太[1] 王强[1] 陈渭鹏[1] 

机构地区：[1]北京航空航天大学热动力工程研究所,北京100083

出　　处：《推进技术》2003年第4期334-336,367,共4页Journal of Propulsion Technology

摘　　要：针对弹用涡扇发动机,计算和比较了3μm～5μm波段轴对称分开排气喷管和轴对称混合排气喷管的红外辐射特性,并与模型实验的结果进行了比较。结果表明,两种类型的排气喷管在红外辐射的空间分布和光谱分布特性方面具有相似的特征,但是红外辐射强度的数值有较大差别;内、外涵混合排气,可以显著降低喷管空腔、尾喷流和整个排气系统的红外辐射。A study for the infrared characteristic at 3 μm-5 μm wave band of the individual exhaust nozzle and mixing exhaust nozzle for a turbofan engine was conducted and the computational results were compared with the results of the model nozzle experiment. The results reveal that the spatial and spectral distribution of the infrared radiation of the two exhaust nozzles are similar, but radiation intensity and spectral radiant intensity of the two exhaust nozzles have significant difference. The mixing exhaust nozzle has significant potential to meet the challenges of reducing exhaust system infrared radiation.

关 键 词：涡轮风扇发动机 排气系统 红外辐射 

分 类 号：V235.13[航空宇航科学与技术—航空宇航推进理论与工程]