PIV Measurements of Turbulence and Flow Structure in the Water Column of the Coastal Ocean

近海水柱湍流和流动结构的 PIV 测量

• 批准号: 9819012
• 负责人: Thomas Osborn
• 金额: $ 56万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819012&HistoricalAwards=false
• 关键词: PIV; Measurements; Turbulence; Flow; Structure

This work combines instrument development and scientific observationsand seeks to apply a proven laboratory technique to the observation ofturbulence in the coastal ocean. A Particle Imagery Velocimetry (PIV) instrument will be deployed on an extensible platform restingon the sea-floor in coastal waters. After testing, the device willbe deployed in 15m of water at the LEO-15 site and used to repeatedlymeasure the flow field over an area of from 0.25 to 0.5 m^2. The resulting data will be used to examine various properties of turbulence in the coastal ocean and its dependence on environmentalparameters such as stratification, wave state and macroscopic shear.Additional data will be collected from the instrument suite alreadyin place at LEO-15 in order to characterize the environmental parameters. Separate deployments during late spring and fall will allow the PIs to study turbulence in different degrees of stratification.

这项工作将仪器开发和科学观测相结合，并试图将一种经过验证的实验室技术应用于沿海海洋中的湍流观测。粒子图像测速仪(PIV)将部署在一个可伸缩平台上，该平台位于沿海水域的海底。测试后，该装置将部署在LEO-15站点的15米深的水中，用于重复测量0.25至0.5m^2区域内的流场。所产生的数据将用于研究沿海海洋湍流的各种特性及其对环境参数的依赖，如层结、波态和宏观切变。额外的数据将从LEO-15已经安装的仪器套件中收集，以表征环境参数。在春末和秋季的单独部署将允许PI研究不同层结程度的湍流。