Open AccessApplication and verification of Sarrau formula in order to calculate pressure acting on the projectile’s base in the 120 mm Leopard 2 A5 tank’s barrel with piezoelectric pressure sensors and Doppler radar usage
Author(s) -
Aleksander Wasilewski,
Janusz Weiss,
Grzegorz Kowalik
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1721/1/012061
Subject(s) - projectile , muzzle velocity , muzzle , mechanics , range of a projectile , acceleration , base (topology) , barrel (horology) , pressure measurement , internal ballistics , pressure sensor , projectile motion , acoustics , trajectory of a projectile , shot (pellet) , physics , materials science , classical mechanics , mathematics , thermodynamics , mathematical analysis , composite material , quantum mechanics , metallurgy
Semi-empiric Sarrau formula relates to a pressure acting on a breech with a pressure acting on the base of a projectile during a shot. Pressure acting on a breech is relatively easy to measure in comparison with pressure acting on projectile’s base. Exact value of projectile’s base pressure can be used in mechanical calculations for projectile, such as strength of a projectile’s body and its acceleration which is essential for example in designing of fuzes. In the paper authors make an attempt for definition coefficient of Sarrau formula to calculate a force acting on projectile’s base. In the paper results of 120 mm Leopard 2 A5 barrel’s shooting tests were used. The results contain pressure in the chamber during a shot measured with a piezoelectric pressure sensor and muzzle velocity measured with a Doppler radar. Piezoelectric sensor registered pressure waveforms. On that basis force acting on the breech was calculated, subsequently force acting on the projectile’s base was calculated with Sarrau formula, kinetic energy and work of the projectile in the barrel. Combining those, muzzle velocity was calculated and compared with muzzle velocity measured with Doppler radar. On that basis the coefficient was determined. The coefficient was later verified with the following shooting tests on 120 mm barrel. Conclusions describe issues during gathering data and results of Sarrau formula verification.