SGER: Light Scattering Manometer

SGER：光散射压力计

• 批准号: 0245667
• 负责人: Walter Goldburg
• 金额: $ 8.05万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-15 至 2005-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0245667&HistoricalAwards=false
• 关键词: SGER; Light; Scattering; Manometer

This a Small Grants for Exploratory Research (SGER) project to develop and calibrate a novel manometer that senses small, rapid pressure fluctuations in turbulent and almost laminar fluids (e. g., air or water), while introducing minimal perturbations in the flow. If successful, the instrument may find additional use in studying small pressure variations in the circulatory system, the heart, and in other biomedical settings. The new and unique technique employs a small volume of a soft clear gel containing micron-size particles chosen for their light scattering properties. Pressure fluctuations elastically compress the gel. Measured time correlations in the inter-particle separations can be directly related to the pressure experienced by the gel sensor. The manometer will be sensitive to pressure fluctuations at the sub-Pascal level (1 mm Hg = 130 Pa), and with a frequency range from dc to higher than 10 KHz. Existing (strain-gauge) pressure sensors are confined to wall regions. The proposed sensor can monitor the bulk fluid region, a great advantage for turbulence measurements. One graduate student will be supported to work on the project. The project is co-funded with the Fluid Dynamics and Hydraulics Program in the Division of Chemical and Thermal Systems in the Engineering Directorate.This a Small Grants for Exploratory Research (SGER) project to develop and calibrate a novel manometer that senses small, rapid pressure fluctuations in turbulent and almost laminar fluids (e. g., air or water), while introducing minimal perturbations in the flow. If successful, the instrument may find additional use in studying small pressure variations in the circulatory system, the heart, and in other biomedical settings. One graduate student will be supported to work on the project. The project is co-funded with the Fluid Dynamics and Hydraulics Program in the Division of Chemical and Thermal Systems in the Engineering Directorate.

这是一个小型探索性研究补助金(SGER)项目，旨在开发和校准一种新型压力计，该压力计可以感知湍流和几乎层流流体(例如空气或水)中微小、快速的压力波动，同时在流动中引入最小的扰动。如果成功，该仪器可能会在研究循环系统、心脏和其他生物医学环境中的微小压力变化方面找到额外的用途。这项新的独特技术使用了一种小体积的柔软透明凝胶，其中包含因其光散射特性而被选择的微米级颗粒。压力波动弹性地压缩凝胶。颗粒间分离中测量的时间相关性可以与凝胶传感器所经历的压力直接相关。该压力计将对亚帕斯卡水平(1毫米汞柱=130帕)的压力波动敏感，频率范围从直流到高于10 kHz。现有的(应变式)压力传感器仅限于墙体区域。所提出的传感器可以监测大块流体区域，这对于湍流测量是一个很大的优势。将支持一名研究生参与该项目。该项目是与工程总监化学和热系统部门的流体动力学和水力计划共同资助的。这是一个小型探索性研究(SGER)项目，旨在开发和校准一种新型压力计，该压力计可以检测湍流和几乎层流流体(例如空气或水)中的微小、快速压力波动，同时在流动中引入最小的扰动。如果成功，该仪器可能会在研究循环系统、心脏和其他生物医学环境中的微小压力变化方面找到额外的用途。将支持一名研究生参与该项目。该项目是与工程局化学和热系统司的流体动力学和水力计划共同资助的。