MRI: Novel Laser Velocimeter Using Modulated Filtered Rayleigh Scattering

MRI：使用调制滤波瑞利散射的新型激光测速仪

• 批准号: 9871249
• 负责人: Philip Varghese
• 金额: $ 17.88万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9871249&HistoricalAwards=false
• 关键词: MRI; Novel; Laser; Velocimeter; Using

Abstract Varghese Funds are awarded to develop a new laser velocimeter that allows continuous measurement of velocity at rates ranging from 10-100 kHz. The instrument will utilize a novel variation on filtered Rayleigh scattering called Modulated Filtered Rayleigh Scattering. This velocimeter will be an improvement on typical laser doppler velocimetry because of the following features: only a single beam is required, rather than two beams, by viewing in opposite directions, two components of velocity can be measured using a single laser beam; velocity measurements every 20 microseconds are feasible; multi-point measurements can be made; measurement sensitivity can be maximized without optical realignment; measurements will be possible in luminous and sooting flames; measurements can be made in unseeded flows. The system will make flow-mapping studies more efficient than current LDV methods.

摘要 Varghese 基金获资助开发一种新型激光测速仪，能够以 10-100 kHz 的速率连续测量速度。 该仪器将利用滤波瑞利散射的一种新颖变体，称为调制滤波瑞利散射。 该测速仪将是对典型激光多普勒测速仪的改进，因为它具有以下特点：仅需要单个光束，而不是两个光束，通过从相反的方向观察，可以使用单个激光束测量速度的两个分量；每 20 微秒进行一次速度测量是可行的；可进行多点测量；无需光学重新对准即可最大化测量灵敏度；可以在发光火焰和黑烟火焰中进行测量；可以在无种子流中进行测量。 该系统将使流量图研究比当前的 LDV 方法更加有效。