【摘要】 利用数值的手段对喷管羽流的红外特性进行了研究。分析了轴对称、椭圆形、矩形及梯形喷管出口对红外辐射特性的影响,结果表明,上方探测平面和下方探测平面的辐射强度分布呈现出不对称性,这一点对于轴对称S型喷管表现得尤为明显。同时在相同的、较小的探测角度下,二元喷管和梯形出口喷管处于一个较低的数值,有利于提高飞行器的隐身性能。更多还原

【Abstract】 Using numerical simulation was been focused focused been to research the infrared radiation characteristic of S-shaped nozzles. Different nozzle outlets such as axial symmetry,oval,rectangular and trapezoidal were analyzed. The results show that the infrared radiation characteristic is asymmetry above and below the detection plane of the radiation detection plane,especially for the S-shaped nozzle. In the mean time,under the condition of same detection angle,binary nozzle and trapezoidal nozzle have a lower infrared radiation value,which means that the binary and trapezoidal nozzle can improve stealth performance of aircraft.更多还原