| 旋成体尾迹涡系的演化机理 | |
| 王刚 ; 李国辉 ; 梁新刚 ; 陈凤 ; WANG Gang ; LI Guo-hui ; LIANG Xin-gang ; CHEN Feng | |
| 2010-06-07 ; 2010-06-07 | |
| 关键词 | 涡动力学 流动机理 数值模拟 旋成体 大攻角 尾迹涡系 vortex dynamics flow mechanism numerical simulation slender body high angle of attack wake-type vortex series O354 |
| 其他题名 | EVOLUTION MECHANISM FOR WAKE-TYPE FLOW OVER SLENDER BODY |
| 中文摘要 | 通过数值模拟绕流过程,揭示了旋成体尾迹涡系的演化机理。较小迎角下三个层次的对称涡结构包含了非对称涡系结构中新生涡的起源结构。阐述了主涡形成脱体涡、tertiary涡演化为新生主涡、主涡与二次涡合并的物理现象,以及涡系展向运动与涡量合并的动力学过程。主涡左右交替生成并依次脱体,在旋成体背部演化出一个截面流态非常类似于卡门涡街的涡系序列,但它是三维的,其演化机理不同于卡门涡街。; Evolution mechanism for wake-type multi-vortex flow over a slender body is studied using numerical simulation. At lower incidences, the symmetric flow pattern of three level vortices contains the origin of the new main vortex in the asymmetrical multi-vortex series. The dynamical process, which accompanies the spanwise movement of vortex series and vorticity transferring, is described clearly for main vortex shedding following tertiary vortex developed to a new main vortex and merged into the secondary vortex on the opposite side of the symmetry plane. Since the main vortex is generated and shed right-and-left, a three dimensional vortex series is developed at the leeside of the slender body. Though the sectional flow pattern of the three dimensional vortex series is very similar to one of the Karman vortex, evolution mechanism of these two vortex series is different. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/37557]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 王刚,李国辉,梁新刚,等. 旋成体尾迹涡系的演化机理[J],2010, 2010. |
| APA | 王刚.,李国辉.,梁新刚.,陈凤.,WANG Gang.,...&CHEN Feng.(2010).旋成体尾迹涡系的演化机理.. |
| MLA | 王刚,et al."旋成体尾迹涡系的演化机理".(2010). |
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