GOALI: Resonant Holographic Interferometry: Diagnostic Capabilities in Multi-Phase Flame Environments

摘要-Dunn-Rankin这是加州大学欧文分校和加州欧文麦德龙激光公司之间的产学研合作项目。共振全息干涉法(RHI)是一种基于激光的诊断技术，它结合了全息术的三维成像能力、干涉测量的相敏检测能力和共振光谱的物种特异性。它通过记录两个不同波长的同时全息图来实现这一点，一个调谐在吸收线附近，另一个调谐关闭这一特征。在重建时，产生的干涉条纹唯一地对应于被询问的物种的密度，同时减去来自背景物种、温度和压力不稳定性以及光学像差的相位贡献。该方法已经在气相燃烧系统中得到了成功的验证。在这项工作中，RHI首次被应用于多相系统。具体地说，将对液滴和喷雾燃烧系统的产品进行定量分析。目前，侵入式光学诊断技术普遍应用于气相燃烧系统和其他反应流动系统的研究。这些方法也在考虑纳入主动控制系统。然而，大多数此类技术仅限于单相系统，这使得它们不适合许多使用液体燃料的重要燃烧系统。据推测，RHI可以克服这一障碍。

Abstract - Dunn-Rankin This is an industry-university cooperative research project between the University of California at Irvine and Metro Laser of Irvine, CA. Resonant holographic interferometry (RHI) is a laser-based diagnostic that combines the three-dimensional imaging capability of holography, the phase- sensitive detection of interferometry, and the species specificity of resonance spectroscopy. It accomplishes this by recording two simultaneous holograms at two different wavelengths, one tuned near an absorption line and the other tuned off this feature. Upon reconstruction, the resulting interference fringes correspond uniquely to the density of the species under interrogation while phase contributions from background species, thermal and pressure instabilities and optical aberrations are subtracted out. The approach has been successfully demonstrated in gas-phase combustion systems. In this effort, RHI is applied to multiphase systems for the first time. Specifically, products from droplet and spray combustion systems will be analyzed quantitatively. Now intrusive optical diagnostic techniques are commonly used in study of gas-phase combustion systems and other reacting flow systems. These methods are also being considered for incorporation in active control systems. However, most such techniques are limited to single-phase systems, making them unsuitable for many important combustion systems that use liquid fuels. It is speculated that RHI can overcome this hurdle.