低速排气非对称二元喷管红外辐射特性实验研究  

Experimental Investigation on IR Characteristics of Unsymmetrically Two-Dimensional Nozzle at Low Exhaust Velocity

作　　者：黄伟[1] 吉洪湖[1] 罗明东[1] 李鹏[2] 宫禹[1] 高潮[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]徐州空军学院航空四站系,徐州221000

出　　处：《南京航空航天大学学报》2008年第1期16-20,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：为了研究非对称二元喷管(Unsymmetrical two-dimensional nozzle,UTDN)的红外辐射特性,首先以宽高比为8的常规二元喷管(AR8)为基础,设计加工了UTDN,然后在涡扇发动机热喷流实验台上测量了UTDN轴线上的温度分布以及在后半球典型探测面内0,10,30,60和90°方向上的红外光谱辐射强度,积分得到辐射强度的空间分布,并在相同的实验条件下,与AR8进行了比较。结果表明:UTDN的掺混能力与AR8相当;在10和30°方向上,UTDN在侧后方测量面内的红外辐射最强;而在60和90°方向上,则是后上方测量面内的红外辐射最强;UTDN通过延长面的遮挡作用,在二元喷管的基础上进一步降低了下方测量面内的红外辐射,最大处降幅达到83.8%。The infrared radiation characteristics of unsymmetrically two-dimensional nozzle （UTDN） are experimentally studied. UTDN is designed and manufactured by prolonging one broad side of a general two-dimensional nozzle AR8 and its aspect radio is 8. Temperature distribution on the axes and spectral IR intensity on the orientation of 0,10,30,60 and 90° on three typical detective planes of the hot plume are measured on hot plume simulation platform of the turbo fan engine. The intensity is integraled from spectral IR intensity. The result shows that the capability of admixture of UTDN is equal to that of AR8 nozzle, and the infrared radiation on the plane of back side is higher than that from 10° and 30°, while 60° and 90° on the plane of the top side. UTDN restrains the IR on the plane of down side by the shade of the prolonging plane, and the maximal decreasing is 83.8°.

关 键 词：红外辐射 涡扇发动机 非对称二元喷管 低速排气 

分 类 号：O434.3[机械工程—光学工程] V231.1[理学—光学]