Accession Number : AD0715709

Title :   Constant-Mach-Number Simulation of Critical Flight Loads on High-Velocity Projectile Fuzes,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Buckley,Frank T.

Report Date : AUG 1969

Pagination or Media Count : 64

Abstract : A study was made to determine the most effective means of using a constant-Mach-number wind tunnel to reproduce flight loads (thermal and mechanical) that would most likely cause failure of high-velocity projectile fuzes. It was concluded that the tunnel Mach number should approximate the projectile launch value to simulate the mechanical loads at launch and shortly thereafter and that the flight aerodynamic heating should be simulated throughout the test to obtain proper fuze heating. The latter is accomplished by duplicating the flight stagnation temperature and maintaining a tunnel stagnation pressure dependent on flight Mach number and stagnation pressure. Rules were developed pertaining to the constant-Mach-number simulation of the flight aerodynamic heating for fuze shapes that may be classified as sharp, spherically capped, or flat-faced cones. (Author)

Descriptors :   (*PROJECTILE FUZES, LOADS(FORCES)), (*AERODYNAMIC HEATING, PROJECTILE FUZES), FAILURE(MECHANICS), SIMULATION, STAGNATION POINT, MACH NUMBER, FLIGHT

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE