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J. KIMS Technol > Volume 22(4); 2019 > Article
Journal of the Korea Institute of Military Science and Technology 2019;22(4):527-535.
DOI: https://doi.org/10.9766/KIMST.2019.22.4.527   
Fairing Design Optimization of Missile Hanger for Drag Reduction
Sora Jeong
The 1st Research and Development Institute, Agency for Defense Development
유도탄 행거 항력 저감을 위한 페어링 형상 최적화
국방과학연구소 제1기술연구본부
Hanger in a rail-launched missile protrudes in general and causes to increase significant drag force. One method to avoid the significant increase of drag force is to apply fairings on the hanger. In this paper, sloping shaped fairing parameters of height, width, and length are optimized to minimize the drag force under subsonic speed region by examining three configurations of fairings : front-fairing only, rear-faring only, and the both front and rear fairing. We use Latin Hypercube Sampling method to determine the experimental points, and computational fluid dynamics with incompressible RANS solver was applied to acquire the data at sampling points. Then, we construct a meta model by kriging method. We find the best choice among three configurations examined : both front and rear fairing reduce the drag force by 63 % without the constraint of fairing mass, and front fairing reduced the drag force by 52 % with the constraint of hanger mass.
Key Words: Optimization, Latin Hypercube Sampling, CFD, Drag Reduction of Missile


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