FUSELAGE SAFETY ESTIMATION METHOD WITH EXTERNAL STORE SEPARATION OF ARMED HELICOPTER

摘要

Provided is a method for determining the safety of a fuselage according to the separation of external arming of an armed helicopter. The method comprises the steps of: calculating the drag of a fuselage of an armed helicopter at an attack of angle (AOA) section of about -20 to about 20 by computational fluid dynamics analysis; calculating the entire drag of the fuselage considering a main rotor hub, a tail rotor hub, Reynolds effect, surface roughness, and drag elements of external fixtures in addition to a fuselage drag value obtained by the computational fluid dynamics analysis; analyzing whether descending wind caused by a main rotor according to the speed of the armed helicopter affects the vicinity of a support for arming; and analyzing whether arming mounted to the outside of the armed helicopter collides with the fuselage when being separated from the armed helicopter.