...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Fluid Mechanics >Formation of surface trailing counter-rotating vortex pairs downstream of a sonic jet in a supersonic cross-flow
【24h】

Formation of surface trailing counter-rotating vortex pairs downstream of a sonic jet in a supersonic cross-flow

机译：在超声波流量中形成表面尾拖轮下游的表面尾部逆向旋转涡旋对

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Direct numerical simulations were conducted to uncover physical aspects of a transverse sonic jet injected into a supersonic cross-flow at a Mach number of 2.7. Simulations were carried out for two different jet-to-cross-flow momentum flux ratios ( $J$ ) of 2.3 and 5.5. It is identified that collision shock waves behind the jet induce a herringbone separation bubble in the near-wall jet wake and a reattachment valley is formed and embayed by the herringbone recirculation zone. The recirculating flow in the jet leeward separation bubble forms a primary trailing counter-rotating vortex pair (TCVP) close to the wall surface. Analysis on streamlines passing the separation region shows that the wing of the herringbone separation bubble serves as a micro-ramp vortex generator and streamlines acquire angular momentum downstream to form a secondary surface TCVP in the reattachment valley. Herringbone separation wings disappear in the far field due to the cross-interaction of lateral supersonic flow and the expansion flow in the reattachment valley, which also leads to the vanishing of the secondary TCVP. A three-dimensional schematic of surface trailing wakes is presented and explains the formation mechanisms of the surface TCVPs.
机译：进行直接数值模拟以揭示以2.7的马赫数注入超声波流量的横向声波喷射的物理方面。为两种不同的喷射流动动量通量比率（$ j $）为2.3和5.5进行模拟。识别出射流后面的碰撞冲击波诱导近壁射流唤醒中的人字形分离气泡，并且由人字形再循环区域形成并嵌入重新连接谷。喷射背风分离气泡中的再循环流动形成靠近壁表面的主要尾端逆向旋转涡旋对（TCVP）。通过分离区域的流线分析表明，人字形分离气泡的机翼用作微斜坡涡流发生器，并且流线在下游采集角动量，以在重新附着谷中形成次级表面TCVP。由于横向超声波流量的交叉相互作用和重新连接谷的膨胀流量，人字形分离翼在远场中消失，这也导致次级TCVP的消失。提出了表面尾痕的三维示意图，并解释了表面TCVP的形成机制。

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