Open AccessEffects of Environment Temperature on The Attenuation of Quasi-Spherical EFP Velocity
Author(s) -
Yue Li,
Shengjun Niu,
Haicheng Shi,
Xuesong Ji,
Xuecen Hu,
Mingjian Li
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 - 10.1088/1742-6596/1855/1/012037
Subject(s) - warhead , aerodynamics , mechanics , attenuation , hypervelocity , materials science , aerodynamic heating , kinetic energy , aerospace engineering , physics , classical mechanics , engineering , optics , thermodynamics , heat transfer
A comparison of multiple quasi-spherical EFP warhead tests conducted during different seasons of the year revealed that EFP velocities in the cold season were low. In this paper, the experimental phenomenon is analyzed theoretically base on the principles of EFP and flight dynamics. Due to the difference of air density caused by the different temperature, the aerodynamic drag of EFP with the same aerodynamic shape and initial velocity is obviously different. Because of the hypervelocity of EFP, The impact velocity of EFP on target is also significantly affected after flying over 100 meters. In the paper, the flight velocities of a quasi-spherical EFP at different temperatures is calculated by MATLAB, which is in good agreement with the experimental results. It is necessary to consider the change of environment temperature in engineering practice of quasi-spherical EFP warhead in order to improve kinetic energy margin.