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Experimental Investigation of NO_x Emission from a Sequential Combustor with the Kinetic Second Zone

机译：具有动力学第二区的顺序燃烧器NO_x排放的实验研究

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This is the fourth paper in a series of publications on the experimental investigation of fuel-air mixture combustion in a combustion chamber (CC) with two combustion zones set in a series with an outlet temperature ranging from 1550 to 1700°C and meeting the requirements for NO~( x )and carbon oxide emissions. The results of the experimental investigation into combustion of gaseous fuel CS comprising two combustion zones set it a series, each with its own burner unit, are presented. The first burner unit (BU1) is typical for low-emission combustors. It has swirlers, a premixing zone, and pilot and main burners. The premixed fuel-air mixture (FAM) is fed to the BU1 inlet. The second burner unit (BU2) is located downstream of the first combustion zone and is fed with FAM with a fuel concentration equal to or higher than the fuel concentration in the first combustion zone. The kinetic fuel combustion whose rate depends on the kinetics of the fuel oxidation reaction rather than on the rate of migration of the reacting components to the flame surface by molecular or kinetic diffusion (as in case of diffusion combustion) occurs in the first and second zones. The second burner unit has its own premixer. In the second zone, the fuel burns in a high-temperature environment at a reduced oxygen content. Four CS configurations with different lengths of the first and second combustion zones were investigated experimentally. The first configuration with single-zone fuel burning is the base one. In the other three configurations, the length of the first and the second zone varied (with the total length of the liner being the same). The results of optimization of the FAN between two sequential combustion zones are presented. The best length of the second zone minimizing NO~( x )and CO emissions at a CC outlet temperature from 1550 to 1700°С was found.
机译：这是一系列出版物中的第四篇，有关在燃烧室（CC）中进行燃料-空气混合物燃烧的实验研究，该燃烧室具有两个燃烧区，串联设置的一系列出口温度在1550至1700°C之间并满足要求用于NO〜（x）和二氧化碳排放。呈现了对气体燃料CS的燃烧进行实验研究的结果，该气体燃料CS包括两个燃烧区，将其划分为一系列，每个燃烧区都有自己的燃烧器单元。第一燃烧器单元（BU1）通常用于低排放燃烧器。它具有旋流器，预混合区以及先导燃烧器和主燃烧器。预混合的燃料-空气混合物（FAM）被送入BU1入口。第二燃烧器单元（BU2）位于第一燃烧区的下游，并被供给燃料浓度等于或高于第一燃烧区中的燃料浓度的FAM。动态燃料燃烧的速率取决于燃料氧化反应的动力学，而不是取决于分子或动态扩散（如扩散燃烧的情况下）的反应组分向火焰表面迁移的速率（如扩散燃烧的情况） 。第二个燃烧器单元有自己的预混合器。在第二区域中，燃料在高温环境下以降低的氧气含量燃烧。实验研究了具有不同长度的第一和第二燃烧区的四种CS构型。基本的单区域燃油燃烧配置是第一种。在其他三个配置中，第一和第二区域的长度是变化的（衬里的总长度相同）。给出了两个连续燃烧区之间的FAN优化结果。发现第二区域的最佳长度是在1550至1700°С的CC出口温度下将NO〜（x）和CO排放降至最低。

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