Rough-wall turbulent boundary layers under external disturbances

外部扰动下的粗糙壁湍流边界层

• 批准号: 2613750
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2613750
• 关键词: Rough; wall; turbulent; boundary; layers

Rough-wall boundary layers are ubiquitous in engineering and environmental applications. Most previous studies have examined turbulent boundary layers over rough-walls in a canonical setting with either a zero pressure gradient or a laminar flow in the freestream. However, in practice, most flows either have a favourable of adverse pressure gradient (such as airfoils, ship hulls etc) or have freestream disturbances. The effect of these external influences on the boundary layer flow remains unexplored. In this project, we will use high fidelity diagnostics (PIV, drag balance etc) in order to understand the flow over rough-walls that are under pressure gradients and freestream turbulence. Brand-new state-of-the-art facilities in the Boldrewood campus (new wind tunnel and water flume) will be used for these measurements.

粗壁边界层在工程和环境应用中无处不在。以前的大多数研究都在规范环境中检查了湍流的边界层，其压力梯度或自由级别的层流流。但是，实际上，大多数流量要么具有不利压力梯度（例如机翼，船体等），要么具有自由度干扰。这些外部影响对边界层流的影响仍未开发。在这个项目中，我们将使用高保真诊断（PIV，阻力平衡等），以了解在压力梯度和自由式湍流下的粗壁上的流动。这些测量值将使用Boldrewood校园（新风隧道和水槽）的全新最先进的设施。