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Proceedings Paper

A new ray tracing model for aero-optical effect simulation of laminar flow field surrounding highly supersonic projectile with cone shape head
Author(s): Sehyun Seong; Sug-Whan Kim; Sangmin Kim; Dongok Ryu; Ho Gyun Kang
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Paper Abstract

We present the apparent optical performance variation of an infrared sensor caused by laminar flow field surrounding a highly supersonic projectile with cone shape head. An optical ray tracing model was constructed and numerical simulations of the aero-optical effects were performed by computational fluid dynamics (CFD) analysis and isodensity surface based ray tracing computation. To maximize modeling and computation efficiency, the number of sampling isodensity layers was reduced to less than 5 for improved discretization of the inhomogeneous gradient index (GRIN) media. Using this method, the simulation results show that the BSE is smaller than about 2.8 arcsec when the projectile flies at 25, 35, 50 km in altitude, Mach 4, 6 in speed, and 0°, 10° in angle of attack. The technical details and implications of the optical ray tracing model are presented together with the simulation results.

Paper Details

Date Published: 18 November 2014
PDF: 9 pages
Proc. SPIE 9249, Electro-Optical and Infrared Systems: Technology and Applications XI, 92491C (18 November 2014); doi: 10.1117/12.2067590
Show Author Affiliations
Sehyun Seong, Spheredyne Co., Ltd. (Korea, Republic of)
Yonsei Univ. (Korea, Republic of)
Sug-Whan Kim, Yonsei Univ. (Korea, Republic of)
Sangmin Kim, Yonsei Univ. (Korea, Republic of)
Dongok Ryu, Spheredyne Co., Ltd. (Korea, Republic of)
Yonsei Univ. (Korea, Republic of)
Ho Gyun Kang, LIG Nex1 Co., Ltd. (Korea, Republic of)


Published in SPIE Proceedings Vol. 9249:
Electro-Optical and Infrared Systems: Technology and Applications XI
David A. Huckridge; Reinhard Ebert, Editor(s)

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