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

这是加州大学欧文分校和加州欧文市Metro Laser公司之间的一个产学研合作项目。共振全息干涉术（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、干涉术的相敏检测和共振光谱的物种特异性。它通过同时记录两个不同波长的全息图来实现这一点，一个在吸收线附近调谐，另一个在吸收线附近调谐。重建后，得到的干涉条纹只对应于被测物种的密度，而来自背景物种、热压不稳定性和光学像差的相位贡献被减去。该方法已在气相燃烧系统中得到了成功的验证。在这项工作中，RHI首次应用于多相系统。具体来说，从液滴和喷雾燃烧系统的产品将进行定量分析。目前，侵入式光学诊断技术已广泛应用于气相燃烧系统和其他反应流系统的研究。这些方法也正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，这使得它们不适用于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.