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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.990
pages 1072-1081

A NUMERICAL STUDY ON UNSTEADY PRESSURE FLUCTUATIONS OF DAVIS GUN

Han-Chang Cho
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 371-1, Kusong-dong, Yuseong-gu, Taejon, 305-701, KOREA
Jae-Kun Yoon
School of Industrial and System Engineering, Hansung University, 389, 2-ga, Samsun-dong, Sungbuk-gu, Seoul, 136-792, KOREA
Hyun Dong Shin
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 371-1, Kusong-dong, Yuseong-gu, Taejon, 305-701, KOREA

ABSTRACT

Interior ballistics code for unsteady pressure fluctuations in a Davis gun with two moving boundaries was developed using two-phase fluid dynamic model. Numerical simulation results were compared with experimental values to evaluate the feasibility of the interior ballistic code. By comparing numerical analysis with the experimental data, the numerical pressure-time history and muzzle velocities of the projectile and the countermass closely agreed with the experimental data. The strong pressure waves were not observed unlike other works. It was considered that this was owing to the high initial porosity and charge ignition near the center of the gun. The pressure wave amplitude was increased exponentially by the lower initial porosity.


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