The double-body missile is a special-structured missile that is formed by two single missile bodies connected together through a shared wing,and thus has unique aerodynamic characteristics.Using the FLUENT software,and spalart-allmaras (S-A) turbulence model,aerodynamic characteristics of single and double-body missiles under different Mach number and angle of attack are analized.The aerodynamic characteristics differences between the two configurations are studied.The calculation results show that: a double-body missile has better lift capacity than a single-body missile,but its resistance is greater,and the lift-to-drag ratio decreases.The resistance of the two types of missile decrease with the increase of attack angle,and their drag reduction amplitudes decrease along with the increase of Mach number.

First of all,the deficiencies of noise interference and coherent interference based on drop edge trigger in radar radio frequency(RF) cover are analyzed, the research is focused on the interference response time and frequency agility signal adaptability. It is pointed out that the response time of coherent interference based on drop edge trigger is long, which is easy to be recognized by the operator and impossible to adapt to frequency agility signal. Therefore, the jamming method based on pulse cluster identification is proposed. The advantage of this method in anti-radar RF cover is analyzed, and its effectiveness is verified.