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

9730408摘要：拟议的仪器项目要求提供资金，以开发一种传感器，该传感器可用于确定高能环境，如海底和表层边界层中的湍流动能率的欧拉测量或剖面测量。新的传感器将提供通过后向散射直接测量全耗散谱的能力。它还将允许分析耗散变量的统计数据。该传感器单轴实验室原型的最初开发由国家科学基金会SBIR赠款(95-60930)提供资金，第二阶段SBIR技术小组建议为最终开发提供后续资金(见97-10425年度审查)，但最终没有获得。该提案是与世界卫生组织约翰·特罗布里奇博士合作的提案(9812514)。首先，PI建议进一步开发仪器，这是必要的，因为野外仪器将需要两(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，国际和平研究所和特罗布里奇博士(WHOI)将在玛莎葡萄园岛南岸进行底边界层对比试验。本实验的目的是检查激光传感器直接测量的耗散，以及使用声学多普勒测速仪从湍流谱推断的耗散。

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.