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http://dx.doi.org/10.5139/JKSAS.2019.47.12.904

The Study on the Fragment Ejection Velocity and Spray Angle from a High Explosive Cylindrical Warhead  

Hwang, Changsu (Department of Aeronautical Science, Jungwon University)
Park, Younghyun (Department of Aeronautical Science, Jungwon University)
Park, Seikwon (Department of Aeronautical Science, Jungwon University)
Jung, Daehan (Department of Mechanical Engineering, Korea Air Force Academy)
Lee, Moonsik (Department of Natural Sciences, Korea Air Force Academy)
Kang, Sunbu (Department of Natural Sciences, Korea Air Force Academy)
Kim, Deuksu (Department of Natural Sciences, Korea Air Force Academy)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.47, no.12, 2019 , pp. 904-912 More about this Journal
Abstract
We have studied the numerical analysis about the fragment ejection velocity and spray angle when the High Explosive warhead detonated at proximity distance at an aircraft. To study the physical quantities about the warhead components is very important to assessment the vulnerability of aircraft. Generally, the physical quantities about the components of a warhead such as the mass, length, diameter and charge to mass ratio are unknown. Therefore, it is required to estimate the physical quantities by using physical continuities of similar threats. The empirical formulas to understand the dependence among charge to mass ratio, length and diameter ratio were driven by using the physical parameters of similar threatening such as terrier, sparrow. As a result, we confirmed that the dead mass ratio was closed to 20% of warhead mass since the metal case of the proximity threat acts as a simple carrier. This implies that the effective length and diameter of High Explosive Compound is smaller than the length and diameter of warhead, and become a key to understand the large ejection gradient velocity and small spray angle of fragments within 6 degree.
Keywords
Cylindrical Warhead; High-explosives; cm Ratio; Ejection Velocity; Spray Angle; Proximity Fuze;
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