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Numerical Investigation of Jet Interactions for a Lateral Thrust Jet Controlled Interceptor Operating at Medium Altitudes

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Abstract

Lateral thrust jets exhibit better maneuverability performance than control surfaces such as conventional fins for attitude control or the orbital transfer of guided weapons. In the supersonic region, however, jet interaction phenomena occur due to the lateral thrust jet during flight and a complicated flow structure is exhibited by the interaction of the shock wave, boundary layer flow, and vortex flow. In particular, hit-to-kill interceptors require precise control and maneuvering; therefore, it is necessary to analyze the effect of the jet interaction flow. A number of conventional jet interaction analyses have been performed under low-altitude conditions; however, there are not many cases with respect to medium-altitude conditions. Unlike low-altitude conditions, jet interaction flows at medium-altitude conditions have different flow characteristics. In this study, a jet interaction flow analysis is performed on a lateral thrust jet controlled interceptor operating at medium altitudes. Based on the results, the characteristics of the flow structure and the changes in the aerodynamic coefficients are analyzed.

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Acknowledgements

This research is conducted at the High-speed Vehicle Research Center of KAIST with the support of Defense Acquisition Program Administration (DAPA) and Agency for Defense Development (ADD). We also appreciate the support provided by Advanced Research Center Program (NRF-2013R1A5A1073861) through National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) contracted through Advanced Space Propulsion Research Center at Seoul National University, by the Korea Institute of Science and Technology Information Supercomputing Center (KSC-2018-CRE-0061) and by Institute of Advanced Aerospace Technology (IAAT) at Seoul National University.

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Correspondence to Chongam Kim.

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Choi, K., Lee, S., Oh, K. et al. Numerical Investigation of Jet Interactions for a Lateral Thrust Jet Controlled Interceptor Operating at Medium Altitudes. Int. J. Aeronaut. Space Sci. 21, 39–49 (2020). https://doi.org/10.1007/s42405-019-00209-x

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  • DOI: https://doi.org/10.1007/s42405-019-00209-x

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