Diagnostics of Swirl Spray Combustion Processes"

喷雾燃烧是美国相当大一部分能源生产的来源，也是几乎所有主要推进系统的基础。相位多普勒干涉术现在经常被用作研究无漩涡情况下的非反应喷雾的诊断工具。本项目涉及液体喷雾燃烧系统中两相传输和空气-燃料相互作用测量技术的研究、开发、制造和应用。该计划第二阶段的目标是：1.解决在液体旋流喷雾燃烧(LSSC)系统中应用相位多普勒技术的局限性。2.扩展相位多普勒仪的功能，以便更有效地分析与LSSC过程相关的湍流输送过程。3.深入评价LSSC环境中液滴和气体输运测量的新仪器。4.研制并演示了功能齐全的样机。实现这些目标的技术途径将是解决目前的限制，扩大能力，通过在实际燃烧室中进行精心设计的无反应和反应条件下的实验来彻底测试先进的诊断技术，并开发新仪器的原型。第二阶段的重要成果将是开发、制造、测试和应用用于喷雾燃烧系统完整诊断的先进仪器。可用于分析LSSC系统的仪器的潜在应用很多：用于飞机的燃气轮机发动机、发电厂发电、用于空间取暖的炉子、火箭发动机燃烧室和用于焚烧危险废物的焚烧炉。这些应用占美国总能源消耗的50%以上。

Spray combustion serves as the source of a substantial portion of the energy production in the United States and as the basic for virtually all the major propulsion systems. Phase Doppler interferometry is now regularly used as the diagnostic tool for studying non reacting sprays in the absence of swirl. This project deals with the research, development, manufacture, and application of this technique for the measurement of two phase transport and air-fuel interaction in liquid spray combustion systems. The objective of Phase II of this program, which are a requisite before this technique can be successfully applied to spray combustion systems, are: 1. To resolve the limitations associated with the application of the phase Doppler technique to liquid swirl spray combustion (LSSC) systems. 2. To expand the capabilities of the phase Doppler instrument to more effectively analyze the turbulent transport processes associated with LSSC processes. 3. To thoroughly evaluate the new instrument for measurement of drop and gas transport in LSSC environments. 4. Develop and demonstrate a fully functional prototype instrument. The technical approach to fulfill these objectives will be to resolve the current limitations, expand the capabilities, exhaustively test the advanced diagnostic technique by performing carefully designed experiments in non reacting and reacting conditions in a practical combustor, and develop a prototype of the new instrument. Significant results of Phase II will be the development, manufacture, testing, and application of an advanced instrument for the complete diagnostic of spray combustion systems. Potential application of an instrument which can be applied to the analysis of LSSC systems are numerous: gas turbine engines for aircraft, power plant generation, furnaces for space heating, rocket engine combustors and incinerators for hazardous waste incineration. These applications account for more than 50% of the total energy consumption in the U.S.