• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2007.04a
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• pp.335-338
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• 2007

In the case of an antiaircraft missile, high angle of attack flight capability is required to get the agile maneuverability in a supersonic flow. Even through a symmetric slender body does not have side slip, asymmetric vortex is generated at high angle of attack conditions. This asymmetric vortex produces unnecessary side force and yawing moment; hence, these effects deteriorate directional stability. In this study, the numerical analysis of asymmetric vortices around the slender body was conducted at high angle of attack supersonic flow. In order to simulate the vortices, a bump is installed on the nose of the slender body. As a result of the numerical analysis, the asymmetric vortices around the slender body could be simulated.

• Journal of the Korea Institute of Military Science and Technology
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• v.20 no.2
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• pp.255-263
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• 2017

An infrared-guided missile has been emerging as a major threat against combat aircraft due to its passive guidance characteristics and with recent advances in stealth technology. Hence, the infrared stealth technology and its effectiveness-evaluation technique become more significant than ever before. In this study, we applied missile aerodynamics to lethal range calculation which allowed more precise prediction. CFD analyses were newly involved in estimating drag force characteristics of an infrared-guided missile. Velocity profiles during flight period of the missile were constructed utilizing these drag characteristics and then incorporated into our in-house code to predict corresponding lethal ranges. The results showed that the present method can predict lethal range more appropriately than the previous one with constant velocity profile. As one of the results, if a fighter gains altitude more which reduces less drag of the attacking missile, then the lethal envelope increases significantly more compared to the lock-on envelope.

• The Korean Journal of Air & Space Law and Policy
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• v.26 no.2
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• pp.41-68
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• 2011

This article deals with the current rules of law of air warfare and its surrounding issues on precautionary action by a military aircraft at air-to-air operation in international armed conflict. However there is no separate and independent legal system to regulate warfare in aerospace in the current system of law of war (or law of armed conflict). In other words, law of air warfare does not exist in a form of a separate treaty. Air warfare has been regulated by international customary law and the relevant provisions in different Conventions, including 1949 four Geneva Conventions and two Additional Protocols, which mainly regulate land and naval warfare. And this makes difficult to make clear a legal term or legal tests on an issue concerned with law of air warfare, which concludes from time to time a dispute on interpretation and implementation of law of air warfare between states. Therefore, this article refers various materials (including 1949 Geneva Conventions and Additional Protocols, San Remo Manual, Harvard Manual, and ICAO Manual on Interception of Civilian Aircraft) for the purpose of defining the current and desirable legal test on precautionary action by military aircraft. In addition to the main purpose of this article, this article tried to show a characteristic of developing mechanism of law of air Warfare taking into account interactions between international air law and law of air warfare.