A Laser Sensor for Direct Eulerian Measurement of Rates and Statistics of Turbulent Kinetic Energy Dissipation

用于直接欧拉测量湍流动能耗散速率和统计的激光传感器

• 批准号: 9730408
• 负责人: Yogesh Agrawal
• 金额: $ 32.5万
• 依托单位: Sequoia Scientific, Inc.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-15 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730408&HistoricalAwards=false
• 关键词: Laser; Sensor; Direct; Eulerian; Measurement

9730408 Summary: The proposed instrumentation project requests funds to develop a sensor that can be used to determine the Eulerian or profiled measurement of turbulent kinetic energy rates in high energy environments such as the bottom and surface boundary layers. The new sensor will offer the capability to measure the full dissipation spectrum directly via backscatter. It will also permit the analysis of statistics of the dissipation variable. Initial development of the single-axis laboratory prototype of this sensor was funded via an NSF SBIR grant (95-60930), and follow-on funding for final development was recommeded by the Phase II SBIR technical panel (see reviews for 97-10425), but was not ultimately obtained. This proposal is a collaborative proposal with Dr. John Trowbridge at WHOI (9812514). First, the Pi proposes further development of the instrument, which is necessary since a two (2) axis system will be required for a field instrument and the PI plans to incorporate a new fast Doppler signal processor and data storage media. Secondly, the PI and Dr. Trowbridge (WHOI) will conduct a bottom boundary layer inter-comparison experiment on the south shore of Martha's Vineyard. The object of this experiment is to examine dissipation as measured directly by the laser sensor, and as deduced from turbulent spectra using an acoustic Doppler velocimeter.

9730408 总结：拟议的仪器项目需要资金来开发一种传感器，该传感器可用于确定高能量环境（如底部和表面边界层）中湍流动能率的欧拉或轮廓测量。 新的传感器将提供直接通过反向散射测量全耗散谱的能力。 它也将允许耗散变量的统计分析。 该传感器的单轴实验室原型的初始开发是通过NSF SBIR赠款（95-60930）资助的，最终开发的后续资金由第二阶段SBIR技术小组建议（见97-10425的评论），但最终没有获得。 本提案是与WHOI（9812514）的John特罗布里奇博士的合作提案。 首先，PI建议进一步开发仪器，这是必要的，因为现场仪器需要两（2）轴系统，PI计划纳入新的快速多普勒信号处理器和数据存储介质。 其次，PI和特罗布里奇博士（WHOI）将在玛莎葡萄园岛的南海岸进行一次底部边界层相互比较实验。 本实验的目的是检查耗散直接测量的激光传感器，并推导出湍流频谱使用声学多普勒测速仪。