...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Fluid Mechanics >Link between subsonic stall and transonic buffet on swept and unswept wings: from global stability analysis to nonlinear dynamics
【24h】

Link between subsonic stall and transonic buffet on swept and unswept wings: from global stability analysis to nonlinear dynamics

机译：Shepep和Unspept Wings上亚音速档位和跨音速自助式的联系：从全局稳定性分析到非线性动力学

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper examines the three-dimensional cellular patterns appearing on wings in subsonic stall and transonic buffet conditions. Unsteady Reynolds-averaged Navier-Stokes simulations are carried out for three-dimensional infinite swept configurations closed by periodic boundary conditions in the spanwise direction. In both flow conditions the occurrence of stall/buffet cells is observed, as well as their convection at a speed proportional to the sweep angle. In transonic buffet conditions, this phenomenon is superimposed to the well-documented two-dimensional buffet instability. These results indicate that the discrepancies between two-dimensional and three-dimensional buffet are caused by the occurrence of buffet cells and that this phenomenon is similar to the one observed at low speed. These phenomena are then studied using global linear stability analysis with the assumption of a periodic flow in the spanwise direction. From these analyses a mode coherent with the two-dimensional buffet is obtained, as well as a mode coherent with two-dimensional vortex shedding in stall conditions. In addition, in both flow conditions an unstable mode reminiscent of stall/buffet cells is observed.
机译：本文研究了亚音速失速和跨音速抖振条件下机翼上出现的三维蜂窝图案。对在展向上由周期边界条件封闭的三维无限掠构型进行了非定常雷诺平均Navier-Stokes模拟。在这两种流动条件下，观察到失速/抖振单元的发生，以及它们以与扫掠角成比例的速度对流。在跨音速抖振条件下，这一现象与文献记载的二维抖振不稳定性相叠加。这些结果表明，二维和三维抖振之间的差异是由抖振单元的出现引起的，这种现象与低速时观察到的现象相似。然后，在翼展方向周期性流动的假设下，使用全局线性稳定性分析来研究这些现象。从这些分析中得到了与二维抖振相关的模态，以及在失速条件下与二维涡脱落相关的模态。此外，在这两种流动条件下，观察到一种类似于失速/抖振单元的不稳定模式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号