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http://dx.doi.org/10.5139/JKSAS.2019.47.4.245

Aerodynamic Analysis Based on the Truncation Ratio of Guided-Weapon Nose Using CFD  

Jeong, Kiyeon (PGM Tech R&D Lab, LIG nex1 Co., Ltd.)
Kang, Dong-Gi (PGM Tech R&D Lab, LIG nex1 Co., Ltd.)
Lee, Daeyeon (PGM Tech R&D Lab, LIG nex1 Co., Ltd.)
Noh, Gyeongho (PGM Tech R&D Lab, LIG nex1 Co., Ltd.)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.47, no.4, 2019 , pp. 245-255 More about this Journal
Abstract
This paper describes on aerodynamic analysis based on the truncation rate of guided-weapon nose using computational fluid dynamics. The shape to perform the analysis is only the body of the guided weapon and the diameter to length ratio is 10.7. Three nose shapes were selected and hemisphere, 25% and 50% truncation were compared. For the accurate CFD analysis of the body, the grid method and the analytical method were selected and verified using NASA wind tunnel test data. For the three nose shapes, the drag analysis for the flight Mach number is 6~20% different. This difference was analyzed by the pressure distribution from nose to base.
Keywords
Nose; Base; Truncation; Recirculation region; Drag Coefficient;
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