High-Frequency Shearing Interferometer Emission Velocemeter (SIEVE) for High-Temperature Gas Diagnostics

这个小型企业创新研究第一阶段项目将开发一种强大的高温气体光学诊断方法，该方法与目前使用的任何技术都有根本的不同。这种诊断提供空间定位信息，例如激光诱导荧光，但不需要激光。它利用热发光气体的光学发射。如该提案中所解释的，发射的光可以被光学检测，随后被操纵并分离成两个分量，其强度差异仅归因于来自发光体积内的空间局部区域的光学发射。更准确地说，这种强度差异是由于所选局部区域中光源分布的一个空间傅立叶分量造成的。由于先前大学和 SBIR 开发了低频设备，因此可以在 SBIR 资助下设计、制造和演示高频剪切干涉仪发射测速仪 (SIEVE)。在第一阶段，将分析将该技术扩展到高频的三种不同方法，开发仪器的概念设计，并计算每种方法的光强度要求。完整的仪器将在第二阶段建造、演示和表征。

This Small Business Innovation Research Phase I Project will develop a powerful optical diagnostic for high temperature gases that is fundamentally different from any technique currently in use. This diagnostic provides spatially localized information, like laser-induced fluorescence, but does not require a laser. It utilizes the optical emission from the hot luminous gases. As explained in this proposal, the emitted light can be optically detected and subsequently manipulated and separated into two components whose intensity difference is due only to optical emission from a spatially localized region within the luminous volume. More precisely, this intensity difference is due to one spatial Fourier component of the light source distribution in the selected, localized region. Because of prior university and SBIR development of low-frequency devices, a high-frequency shearing interferometer emission velocimeter (SIEVE) can be designed, fabricated, and demonstrated under SBIR funding. In Phase I, three different ways to extend the technique to high frequencies will be analyzed, conceptual designs for instruments will be developed, and the light intensity requirements for each method will be calculated. A complete instrument will be built, demonstrated, and characterized during Phase II.