Upgrade of laser doppler anemometer optics for near-wall measurements

用于近壁测量的激光多普勒风速计光学器件的升级

• 批准号: 375153-2009
• 负责人: Bergstrom, Donald
• 金额: $ 2.41万
• 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: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=412098
• 关键词: Upgrade; laser; doppler; anemometer; optics

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. Turbulence has many important practical applications including increased skin friction drag and increased wall heat transfer rates. In the atmosphere and hydrosphere, turbulence is responsible for the rapid dilution of contaminants. In order to improve the design of a flow system or mitigate adverse enviromental impacts, engineers often need to better understand turbulence and its associated transport.

在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的明显随机小尺度波动相关的混合水平增强。 湍流具有许多重要的实际应用，包括增加表面摩擦阻力和增加壁传热率。 在大气和水圈中，湍流是污染物迅速稀释的原因。 为了改善流动系统的设计或减轻不利的环境影响，工程师通常需要更好地了解湍流及其相关的传输。