CAJ | 학술논문

针对收扩喷管，在高温（约640℃）、高速（超音速）流动状态下，实验研究了加装小突片后对飞机发动机尾喷流红外辐射的抑制效果，并探讨了小突片堵塞比、小突片后倾角度等因素对红外辐射抑制特性的影响。结果表明，小突片对热射流的红外辐射具有明显的抑制作用，不仅使热射流的核心区长度大为缩短，而且使热射流的总体红外辐射信号大幅度下降（在本文实验范围内，最大可下降约57%）。
침대수확분관，재고온（약640℃）、고속（초음속）류동상태하，실험연구료가장소돌편후대비궤발동궤미분류홍외복사적억제효과，병탐토료소돌편도새비、소돌편후경각도등인소대홍외복사억제특성적영향。결과표명，소돌편대열사류적홍외복사구유명현적억제작용，불부사열사류적핵심구장도대위축단，이차사열사류적총체홍외복사신호대폭도하강（재본문실험범위내，최대가하강약57%）。
The effect of tabs fixed on a convergent-divergent nozzle on theinfrared radiation of the exhausting high speed (subsonic and supersonic) hot (about 640℃) jet was investigated,and the influence of tab block ratio and inclined angle on the suppression of infrared radiation was studied.The results show that tabs can cut down a good lot of hot jet core length and suppress the infrared radiation up to 57% from the hot jet.The increase in tab block ratio of 1% decreases the infrared radiation intensity of the whole hot exhausting gas by about 5.5% in average,and the increase in tab inclined angle by 1 degree can suppress the infrared radiation intensity of the whole hot exhausting gas by about 0.21% in average in the test conditions.