Numerical Analysis of Aerodynamic and Infrared Radiation Characteristics of B2
In this paper,the B2 bomber is designed on the integrated inlet and exhaust system.The aero-dynamic/infrared characteristics of the bomber under different flight conditions were calculated.The re-sults show that when the flight Mach number is increased,the effect of convective heat transfer heating generated by the outflow is more and more obvious,and in the transonic flight,the temperature of the front edge of the fuselage increases due to the aerodynamic heating;In the horizontal direction,with the in-crease of detection Angle,the infrared radiation intensity of bomber decreases in the band of 3～5μm and 8～14μm band;In the vertical direction detection,the maximum infrared radiation intensity value below the bomber in the 3-5μm band is only 20%of the maximum value above,which is of great significance to avoid the infrared detection from the ground and low altitude;The suppression effect of reducing the wall emission rate in the 3～5μm band on the bomber infrared radiation is more obvious in the rear and upper detection Angle,with a maximum reduction of 60%;After reducing the wall firing rate in the 8～14μm band,the infrared characteristics of the bomber were significantly reduced,with a maximum reduc-tion of 70%.
flying wing layoutinlet and exhaust systeminfrared radiation characteristicsinfrared ima-ging
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