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首页> 外文会议>ASME Turbo Expo: Turbomachinery Technical Conference and Exposition >EMISSIONS PERFORMANCE OF STAGED PREMIXED AND DIFFUSION COMBUSTOR CONCEPTS FOR AN NH_3/AIR FLAME WITH AND WITHOUT REACTANT HUMIDIFICATION
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EMISSIONS PERFORMANCE OF STAGED PREMIXED AND DIFFUSION COMBUSTOR CONCEPTS FOR AN NH_3/AIR FLAME WITH AND WITHOUT REACTANT HUMIDIFICATION

机译：用于NH_3 /空气火焰的分阶段预混和扩散燃烧器概念的排放性能与无反应剂加湿

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Renewably generated ammonia offers a form of carbon-free chemical energy storage to meet the differences between uncertain renewable supply and fluctuating demand, and has the potential to support future energy requirements as a power-to-X concept. The storage and transportation characteristics of NH_3 are favorable compared with H_2, however there are significant combustion research challenges to enhance fuel reactivity whilst reducing harmful emissions production. The purpose of the presented work was to evaluate different fuel delivery concepts for a representative GT combustor. An experimental and numerical comparison was made between swirl-stabilized premixed and diffusion NH_3-air flames at elevated inlet temperature (473 K). The exhaust NO_x and unburned NH3 emissions generated from each concept were quantified to optimize operational combustor performance. High-speed OH* and NH_2* chemiluminescence was employed to characterize the change inflame topology with variation in fuel-air equivalence ratio, and the resultant influence on measured emission concentrations. Chemiluminescence intensities were shown to elucidate changes in sampled exhaust emissions, enabling detailed analysis of intermediate chemistry. A comparison was made between experimental data and chemical kinetic simulations with a reactor network model, demonstrating the sensitivity of NO_x emissions to premixed fuel-air equivalence ratio. A comparison was also made between exclusive primary airflow, and the staged introduction of secondary air, to quantify the change in NO_x production between each configuration and improve fuel burnout. Secondary air loadings were incrementally increased through the combustor, and the change in exhaust emissions mapped. In addition, reactant humidification was employed as a secondary process for NO_x reduction, having shown favorable performance with NH_3/H_2 mixtures to limit thermochemical NO production. The efficacy of humidifwation was compared for both premixed and diffusion configurations.
机译：可再生生成的氨提供一种无碳化学能量存储形式，以满足不确定的可再生供应和需求波动之间的差异，并且有可能支持未来的能源要求作为电源到X概念。与H_2相比，NH_3的储存和运输特性是有利的，然而，有显着的燃烧研究挑战，以提高燃料反应性，同时减少有害排放生产。所提出的工作的目的是评估代表性GT燃烧器的不同燃料输送概念。在升高入口温度（473k）的旋涡稳定的预混合和扩散NH_3-AIR运动中进行实验和数值比较。量化从每个概念产生的排气NO_X和未燃烧的NH3排放以优化操作燃烧器性能。高速OH *和NH_2 *化学发光用于表征与燃料 - 空气当量比变化的改变发炎的拓扑结构，以及所测量的排放浓度所得的影响。表明化学发光强度阐明了采样废气排放的变化，从而进行了中间化学的详细分析。使用反应堆网络模型在实验数据和化学动力学模拟之间进行了比较，证明了NO_X排放对预混燃料空气等效比的敏感性。在独有的主要气流和分阶段的二级介绍之间也进行了比较，以量化每种配置之间的NO_X产生的变化，提高燃料倦怠。通过燃烧器逐渐增加二次空气载荷，并映射了废气排放的变化。此外，使用反应物湿化作为NO_X还原的二级方法，表现出具有NH_3 / H_2混合物的良好性能，以限制热化学无生产。比较加湿的功效，以预混和扩散配置。

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