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普遍存在。以前的大多数研究都是在零压力梯度或自由流层流的标准环境下对粗糙壁面上的湍流边界层进行研究。然而，在实践中，大多数流动要么具有有利的逆压梯度（如翼型、船体等），要么具有自由流扰动。这些外部影响对边界层流动的影响仍未得到探讨。在这个项目中，我们将使用高保真诊断（PIV，阻力平衡等）来了解压力梯度和自由流湍流下粗糙壁的流动情况。Boldrewood校区全新的先进设备（新的风洞和水槽）将用于这些测量。