SBIR Phase II: High-Frequency Shearing Interferometer Emission Velocimeter (SIEVE) for High-Temperature Gas Diagnostics

SBIR 第二阶段：用于高温气体诊断的高频剪切干涉仪发射测速仪 (SIEVE)

• 批准号: 9529856
• 负责人: PETER ROSTLER
• 金额: $ 28.22万
• 依托单位: Science Research Laboratory Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529856&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Frequency; Shearing

Rostler 9529856 This Small Business Innovation Research Phase II project will develop a powerful optical diagnostic for high temperature gases that is fundamentally different from any technique currently in use. This diagnostic is spatially localized but completely nonperturbing. For hot luminous gases it utilizes the optical emission from the gas itself. For less luminous gases, the new method can also be used by monitoring refractive effects on laser beams passed through the flow. In either realization, the light emerging from the gas is separated into two components whose intensity difference is due only to fluctuations of selected scale size in a spatially localized region within the extended volume of the flow. For low-frequency (10 MHz) phenomena, the method has already been demonstrated and is currently being developed under other programs. The purpose of this Phase II program is to extend the technique to much higher frequencies, which will allow study of smaller-scale phenomena and faster flows, as well as fast waves in plasmas. In Phase I a high-frequency detector head was designed and a new ultrahigh-frequency instrument was invented. Prototypes of both instruments will be fabricated and tested in Phase II. A high-frequency localized optical velocimeter would be a valuable diagnostic for very hot gases such as are found in arcs, combustion furnaces and industrial plasma processing chambers. It would also be useful for detailed studies of small-scale phenomena in flowing gases, such as boundary layers and turbulent wakes in wind tunnels. In the future, it is envisioned that this new instrument could also be used in process control applications. Groups conducting research on gases and plasmas would be the initial customers for such an instrument.

Rostler 9529856这个小型企业创新研究第二阶段项目将开发一种功能强大的高温气体光学诊断方法，它与目前使用的任何技术都有根本的不同。这种诊断在空间上是局部性的，但完全不受干扰。对于炽热的发光气体，它利用气体本身的光发射。对于亮度较低的气体，新方法也可以通过监测通过气流的激光的折射效应来使用。在任一实现中，从气体中出射的光被分成两个分量，其强度差异仅仅是由于在流的扩展体积内的空间局部化区域中所选尺度尺寸的波动所致。对于低频(10 MHz)现象，该方法已经得到了演示，目前正在根据其他程序进行开发。这个第二阶段计划的目的是将这项技术扩展到更高的频率，这将允许研究更小规模的现象和更快的流动，以及等离子体中的快速波。在第一阶段，设计了高频探测头，并发明了一种新的超高频仪器。这两种仪器的原型都将在第二阶段进行制造和测试。高频本地化光学测速仪将是非常热的气体的宝贵诊断工具，例如在电弧、燃烧炉和工业等离子体处理室内发现的气体。这也将有助于详细研究流动气体中的小尺度现象，如风洞中的边界层和湍流尾迹。在未来，预计这种新仪器也可以用于过程控制应用。对气体和等离子体进行研究的小组将是这种仪器的最初客户。