Development of a Phosphorescence Technique for Joint Velocity-Scalar-Temperature Measurements in Lean, Premixed, Stratified and Mild Combustion

我们的目标是开发一种诊断技术，联合标量和速度测量稀薄预混，分层和“温和”燃烧。这种火焰需要比经典的非预混火焰更详细地了解流动，混合，燃烧及其相互作用，我们的技术将以合理的成本提供新的见解。我们的技术通过使用不同类型的磷光颗粒，将允许不同的流体流被区分，从而扩展了经典的PIV。这些粒子的发射衰减率和发射光谱强烈地依赖于温度，这使得温度场可以与速度场同时测量。最终，我们的技术将提供同步的速度/混合/温度数据，为模型开发和设计的清洁，贫预混燃气轮机燃烧室，分层内燃机，和未来的燃烧室在“温和”的燃烧制度。我们的技术的另一个有吸引力的特点是它的潜力，被应用于整个燃烧室，包括附近的壁的薄膜冷却的散射效应，往往排除使用粒子图像测速技术的分析。

We aim to develop a diagnostic technique for joint scalar and velocity measurements in lean-premixed, stratified and 'mild' combustion. Such flames require a more detailed understanding of flow, mixing, combustion and their interaction than classical non-premixed flames, and our technique will provide new insights at an affordable cost. Our technique extends the classical PIV by using different types of phosphorescent particles that will allow different fluid streams to be distinguished. The emission decay-rate and the emission spectrum of these particles strongly depend on temperature, which allows the temperature field to be measured at the same time as the velocity field. Eventually, our technique will provide simultaneous velocity/mixing/temperature data, as required for model development and for the design of cleaner, lean premixed gas-turbine combustors, stratified internal combustion engines, and future combustors in the 'mild' combustion regime. A further attractive feature of our technique is its potential to be applied throughout an entire combustor, including the analysis of film cooling near the walls where scattering effects often preclude the use of particle image velocimetry techniques.