| 摘要: |
| 针对栅格舵（翼）技术的主要缺点——跨声速壅塞和阻力高的问题。以简化栅格为研究对象，采用数值分析方法开展了P型和V型局部后掠对气动特性的影响研究，并开展了不同后掠角对气动特性的影响研究。研究发现,局部后掠方式能够弱化或消除亚声速背风区的分离问题，减小跨声速区激波与边界层干扰，解决栅格舵固有的跨声速壅塞和阻力大的问题。局部后掠对栅格减阻有显著效果，尤其是高超声速段，同时能够增加单位浸润面积的法向力，从而提高栅格舵的操纵效率。 |
| 关键词: 栅格舵 局部后掠 气动特性 壅塞 减阻 |
| DOI： |
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| 基金项目:国家自然科学基金（11872128） |
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| Research on Aerodynamic Characteristic of Locally Swept Grid Fins |
| DU Tao,GONG Anlong,TANG Wei,MOU Yu,ZHANG Ran,ZHANG Yunlong,YANG Yunjun |
| (Beijing Institute of Astronautical Systems Engineering;China Academy of Aerospace Aerodynamics) |
| Abstract: |
| To overcome the main flaw of grid fin technology, i.e, transonic chocked flow and high drag, the locally swept grid fins are explored in this paper. Taking the simplied geometry of grid fin as the research object, aerodynamic characteristics of peak type and valley type locally swept grid fins are studied, and effects of different swept angles are compared. The result shows that locally swept manner can weaken and even remove the separated back flow at subsonic, reduce shock wave/boundary layer intercation at transonic to solve transonic chocked flow and high drag problems. More over, at supersonic range, locally swept manner can reduced drag and enhance the lift per unit wetted area to improve the aerodynamic control efficiency. |
| Key words: Grid fin Locally swept Aerodynamic characteristic Chocked flow Drag reduction |