Combustion in the Turbine: Transonic, Accelerating, Mixing and Reacting Flows

摘要- Sirignano 这是一个理论，计算和实验研究，检查多维，跨音速，多组分，反应流在高雷诺数范围内，重点是在加速或减速流的燃烧过程和流体动力学现象之间的耦合。 被认为是对能量转换效率的影响，对流体动力学稳定性，并对潜在的氮氧化物的形成。 能量效率的情况下，在温度是有限的材料的限制，使释放的能量作为动能的表达是有利的。 研究了反应流中存在严重密度分层和强压力梯度的流体动力学稳定性。 降低火焰温度的影响，包括潜在的熄灭和减少氮氧化物的形成，进行了分析。 这主要是一个基本问题和广泛的应用研究，但一个应用程序将探讨一些细节：在地面燃气轮机涡轮机通道燃烧。 这项研究可能会导致新的概念，设计涡轮机，更有效，更稳定，污染少，比现存的模型。 可以预见，在使用燃气轮机的任何地方都将有广泛的应用，包括发电、飞机推进和其他动力系统。

Abstract - Sirignano This is a theoretical, computational, and experimental study examining multidimensional, transonic, multicomponent, reacting flows in a high Reynolds-number range, with emphasis on the coupling between combustion processes and fluid-dynamic phenomena in an accelerating or decelerating flow. The impacts on efficiency of the energy conversion, on hydrodynamic stability, and on the potential formation of oxides of nitrogen are considered. Energy efficiency is examined in situations in which temperature is limited by material constraints so that expression of released energy as kinetic energy is advantageous. Hydrodynamic stability is studied in reacting flows where severe density stratifications and strong pressure gradients are present. Effects of reduction of flame temperature in the stream, including potentials for extinction and reduced nitrogen oxide formation, are analyzed. This is primarily a study of fundamental issues and broad applications, but one application will be explored in some detail: combustion in turbine passages in ground-based gas turbines. This study could potentially lead to new concepts for design of turbines that are more efficient, more stable, and less polluting than extant models. Broad applications wherever gas turbines are used would be foreseen, including electric power generation, aircraft propulsion, and other power systems.