Lattice Boltzmann Simulations of a pitch-up and pitch-down maneuver of a span-wise flexible wing in a free stream flow Read More: http://arc.aiaa.org/doi/abs/10.2514/6.2012-300
文献类型：会议论文
| 作者 | Qi DW; He GW(何国威); Liu YM |
| 出版日期 | 2012 |
| 会议名称 | 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition |
| 会议日期 | JAN 09-12, 2012 |
| 会议地点 | Nashville, TN, United states |
| 关键词 | Aerospace engineering Deformation Exhibitions Flexible wings Reynolds number Rigidity Vortex flow Aerodynamic forces Chord-based Reynolds number Flexural rigidities Free stream Free-stream flow Lattice boltzmann Leading-edge vortices Lift coefficient Lift force Particle methods Pitch rate Power efficiency Reduced frequency Three dimensional space Time-periods Tip edge Trailing edges Trailing vortex |
| 页码 | AIAA 2012-0300 |
| 通讯作者 | Qi DW |
| 中文摘要 | A span-wise flexible wing undergoing a rapid pitch-up and pitch-down maneuver in a steady free stream is studied with a lattice Boltzmann flexible particle method (LBFPM) in a three-dimensional space at a chord based Reynolds number of 100. The pitching rates and flexibility are systematically varied, and their effects on the generated aerodynamic forces and power efficiency are explored. It is found that at a higher pitch rate average lift coefficient increases first, as flexural rigidity decreases, and arrives at a maximum, then falls down as the flexural rigidity continuously decreases, while at a lower pitch rate, no similar phenomena is observed. It seems that flexibility can be utilized to improve lift at a high reduced frequency. A small deformation at a level of 5% due to flexibility can largely improve lift force only during pitch-down time period. On the Contrary, flexibility has a negative impact on the lift during pitch-up time period. Most likely, deformation may passively and dynamically adjust the trailing edge position along the span direction, induce larger leading edge vortices (LEV) and tip edge vortices (TEV), and enhance trailing vortex shedding due to Kutta condition, thus improve lift. |
| 收录类别 | EI |
| 合作状况 | 国际 |
| 产权排序 | 1 Department of Paper Engineering, Chemical Engineering and Imaging, Western Michigan University, Kalamazoo MI 49008, United States 2 Institute of Mechanics, LNM, Chinese Academy of Sciences, Beijing, 100080, China 3 Yangtze Center of Mathematics, Sichuan University, Chengdu 610064, China |
| 会议网址 | http://dx.doi.org/10.2514/6.2012-300 |
| 会议录 | 50TH AIAA AEROSPACE SCIENCES MEETING INCLUDING THE NEW HORIZONS FORUM AND AEROSPACE EXPOSITION
 |
| 会议录出版者 | AMERICAN INSTITUTE OF AERONAUTICS AND ASTRONAUTICS INC., 1801 ALEXANDER BELL DRIVE, SUITE 500, RESTON, VA 20191-4344, UNITED STATES |
| 语种 | 英语 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/46825]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qi DW,He GW,Liu YM. Lattice Boltzmann Simulations of a pitch-up and pitch-down maneuver of a span-wise flexible wing in a free stream flow Read More: http://arc.aiaa.org/doi/abs/10.2514/6.2012-300[C]. 见:50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Nashville, TN, United states. JAN 09-12, 2012.http://dx.doi.org/10.2514/6.2012-300. |
入库方式： OAI收割
来源：力学研究所
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