Fundamental studies on incompressible flat-plate boundary layer and pipe flow

不可压缩平板边界层与管流基础研究

• 批准号: 341912-2010
• 负责人: Wu, Xiaohua
• 金额: $ 2.04万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=549535
• 关键词: Fundamental; studies; incompressible; flat; plate

Incompressible zero-pressure-gradient boundary layer over a smooth flat-plate and incompressible flow through a smooth pipe are two fundamental building blocks of modern fluid mechanics. In the meantime, they are also the limiting cases and calibration benchmarks of many complicated engineering flows such as the boundary layer on an aircraft wing. Experiments have provided indirect evidence for the organization of large-scale vortex structures in the form of hairpin packets in the boundary layer and pipe flow. Theoreticians also hypothesized the existence of hairpin forest. Perplexingly, neither dominant hairpin packet nor hairpin forest could be detected from previous incompressible turbulent boundary layer and pipe flow simulations.

光滑平板上的不可压缩零压力梯度边界层和光滑管道中的不可压缩流动是现代流体力学的两个基本组成部分。同时，它们也是诸如机翼边界层等许多复杂工程流动的极限情况和标定基准。实验已经为边界层和管流中发卡包形式的大尺度涡结构的组织提供了间接证据。理论家还假设发夹森林的存在。令人困惑的是，既没有占主导地位的发夹包，也没有发夹森林可以检测到从以前的不可压缩湍流边界层和管流模拟。