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

涡轮机中的燃烧：跨音速流、加速流、混合流和反应流

• 批准号: 9714930
• 负责人: William Sirignano
• 金额: $ 38万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714930&HistoricalAwards=false
• 关键词: Combustion; Turbine; Transonic; Accelerating; Mixing

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.

这是一项理论、计算和实验研究，研究了高雷诺数范围内多维、跨音速、多组分的反应流动，重点研究了加速或减速流动中燃烧过程和流体动力学现象之间的耦合。考虑了对能量转换效率、水动力稳定性和氮氧化物潜在形成的影响。能源效率是在温度受材料限制的情况下进行研究的，因此将释放的能量表示为动能是有利的。研究了存在严重密度分层和强压力梯度的反应流的水动力稳定性。分析了火焰温度降低对流的影响，包括消光势和减少的氮氧化物生成。这主要是对基本问题和广泛应用的研究，但将详细探讨一个应用：地面燃气轮机涡轮通道中的燃烧。这项研究可能会带来比现有型号更高效、更稳定、污染更少的涡轮机设计新概念。燃气轮机的广泛应用可以预见，包括发电、飞机推进和其他动力系统。