Abstract: Three key problems in the aerodynamic configuration design for Extended Range Guided Munition (ERGM) are expounded, and the trajectory characteristic of ERGM is analyzed. Based upon these, ERGM aerodynamic configuration is designed. The radar cross sections (RCS) of the configuration are computed by using the physical optics method. Comparing the designed configuration with the original configuration, for the Mach number from 2.5 to 3.5, the wind tunnel experimental results indicate that the zero-lift drag coefficient decreases by 30%, and the static stability increases from 4.5% to 9%. Moreover, the rudder deflection angle matches reasonably with the balance angle of attack, so the ERGM has super glide ability. RCS computational results show that the ERGM has smaller radar cross section at head-on scope of ±30 and ±60.

Key words: extended range guided munition(ERGM), aerodynamic configuration design, aerodynamic characteristic, wind tunnel experiment, radar cross section(RCS)