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Other TitleNumerical Analysis of Beam Riding Performance for Laser Propulsion Vehicle
Author(jpn)高橋, 聖幸; 大西, 直文
Author(eng)Takahashi, Masayuki; Onishi, Naofumi
Author Affiliation(jpn)東北大学; 東北大学
Author Affiliation(eng)Tohoku University; Tohoku University
Issue Date2012-03-30
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第43回流体力学講演会: 航空宇宙数値シミュレーション技術シンポジウム2011論文集
JAXA special publication: Proceedings of 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011
Start page247
End page252
Publication date2012-03-30
AbstractA beam riding performance is very important for a stable flight of a laser propulsion vehicle. We have developed a three-dimensional hydrodynamics code coupling with six-degree-of-freedom equation of motion of the laser propulsion vehicle for analyzing beam riding performance through numerical simulations of flowfield interacting with unsteady motion of the vehicle. An asymetric energy distribution was initially added around the focal spot (ring) in order to estimate the beam riding performance against laser offset and laser oblique incidence. The centering performance of the vehicle is good with the initial laser offset due to anasymetric blast wave. However, the Euler angle grows and never returns to zero in a time scale of laser pulse. It is necessary that the tipping performance of the vehicle is improved against the laser offset. Also, when the laser is irradiated to the vehicle with initial tipping angle, we found that the vehicle can obtain restoring moments to cancel the initial angular offset. The tipping performance is promisng with the laser oblique incidence, though the vehicle cannot get sufficient restorig force in particular angle. Finally, we showed that a precessional motion due to a gyro spin improves the tipping performance of the vehicle.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo Japan
形態: カラー図版あり
会議情報: 第43回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2011 (2011年7月7日-8日. 早稲田大学国際会議場) 東京
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-015

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