The Method for Numerical Simulation of the Impact on the Infrared Radiation Seeker from the Warhead Shock Layer

摘要

It counts the impact on the infrared radiation seeker which in the head of the hypersonic missile. Firstly, it built the calculated model based on the shape of a missile, and compartmentalized the aerodynamics flow field grid, the infrared radiation seeker main mirror grid, the radiation field grid, and had the relation of the grids unambiguous, and got the communication of the aerodynamics flow field. Then it educed irradiance formula about the shock layer aerodynamic flow fled radiation affect to the infrared radiation seeker main mirror. The result is the infrared radiation wave band 3～5 mMto the main mirror, from the shock layer aerodynamic flow fled is about 120 W/m~2. The distributing law of the impact is annular circumfused the center of the main mirror, the infrared radiation is the highest in the center of the main mirror, decreased by the radius of the main mirror.