Experimental facility for velocity measurements in a turbulent wall jet

湍流壁射流速度测量实验装置

• 批准号: 390764-2010
• 负责人: Bergstrom, Donald
• 金额: $ 2.06万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=443280
• 关键词: Experimental; facility; velocity; measurements; turbulent

Most flows encountered in industrial or environmental applications are turbulent, which is to say that they are characterised by enhanced levels of mixing associated with apparently random small-scale fluctuations of the velocity field. This is one example of so-called chaotic behaviour of a physical system. Although inherently difficult to understand, turbulence has many important practical applications including increasd skin friction drag (e.g. for aircraft) and increased wall heat transfer rates (e.g. for heat exhcangers.) In the atmosphere and hydrosphere, turbulence is responsible for the rapid dilution of contaminants. In order to improve the design of flow systems or mitigate adverse environmental impacts, engineers need to better understand turbulence and the associated transport.

工业或环境应用中遇到的大多数流动都是湍流，也就是说，它们的特征是与速度场明显随机的小规模波动相关的混合水平增强。 这是物理系统所谓的混沌行为的一个例子。 尽管本质上很难理解，但湍流具有许多重要的实际应用，包括增加表面摩擦阻力（例如对于飞机）和增加壁传热速率（例如对于热交换器）。在大气和水圈中，湍流是污染物快速稀释的原因。 为了改进流动系统的设计或减轻不利的环境影响，工程师需要更好地了解湍流和相关的传输。