Numerical Analysis for the Safe Range of AOA under Bird Impact on Unmanned BWB
In case of UAV (unmanned aerial vehicle), it has critical unsafe factor comparing airplane, caused by electronic control and light weight. Electronic control could make the critical failure unexpected situation and light weight could happen large pinch momentum. Most of bird-strike has been focused on not the change of momentum but damage of thrust mechanism. However, in UAV case, due to relative light weight AOA (angle of attack) could be changed until certain stall point. The purpose of this study was to suggest of safe flying condition. This study used the BWB (blended wing body) aircraft which is brand-new type of aircraft and many researchers have tried to design as UAV. In this study, the process was proceeded four steps which are analyzing characteristic of aerodynamics in determine AOA, calculating the momentum varying AOA, finding the change of AOA after the impact each case using momentum analysis, and with the analysis of specific stall angle, suggesting safety AOA after impact. This study considered that when force of restitution was equal to pinch moment, change of AOA would be stopped. This study used k-e model to find characteristic of aerodynamics and LS-DYNA to figure out the amount of momentum
BWB(blended wing body) Bird impact safe flight rage UAV(unmanned aircraft vehicle) CFD
Lee Jaehoon Lee Sangyoun Kim Yoonjung Cho Chongdu Yoon Joonyong
Department of Mechanical Engineering,Hanyang University, Seoul, Korea Department of Mechanical Engineering, In-ha University, In-cheon, Korea R&D Center, KSsystem co., Ltd., Kyunggi-Do, Korea
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
901-904
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）