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首页> 外文期刊>Polish Maritime Research >INVESTIGATIONS OF THE EMISSION CHARACTERISTICS OF A DUAL-FUEL GAS TURBINE COMBUSTION CHAMBER OPERATING SIMULTANEOUSLY ON LIQUID AND GASEOUS FUELS
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INVESTIGATIONS OF THE EMISSION CHARACTERISTICS OF A DUAL-FUEL GAS TURBINE COMBUSTION CHAMBER OPERATING SIMULTANEOUSLY ON LIQUID AND GASEOUS FUELS

机译：双燃气燃气轮机燃烧室的排放特性在液态燃料上同时操作的双燃气燃气轮机燃烧室的排放特性

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This study is dedicated to investigations of the working process in a dual-fuel low-emission combustion chamber for afloating vessel's gas turbine. As the object of the research, a low-emission gas turbine combustion chamber with partial premixing offuel and air inside the outer and inner radial-axial swirls was chosen. The method of the research is based on the numerical solution of the system of differential equations which represent the physical process of mass and energy conservation and transformations and species transport for a multi-component chemically reactive turbulent system, considering nitrogen oxides formation and a discrete ordinates model of radiation. The chemistry kinetics is presented by the 6-step mechanism of combustion. Seven fuel supply operating modes, varying from 100% gaseous fuel to 100% liquid fuel, have been analysed. This analysis has revealed the possibility of the application of computational fluid dynamics for problems of dual-fuel combustion chambers for the design of a floating vessel's gas turbine. Moreover, the study has shown the possibility of working in different transitional gaseous and liquid fuel supply modes, as they satisfy modern ecological requirements. The dependencies of the averaged temperature, NO, and CO concentrations along the length of the low-emission gas turbine combustion chamber for different cases of fuel supply are presented. Depending on the different operating modes, the calculated emission of nitrogen oxides NO and carbon monoxide CO at the outlet cross-section of a flame tube are different, but, they lie in the ranges of 31-50 and 23-24 mg/nm(3) on the peak of 100% liquid fuel supply mode. At operating modes where a gaseous fuel supply prevails, nitrogen oxide NO and carbon monoxide CO emissions lie in the ranges of 1.2-4.0 and 0.04-18 mg/nm(3) respectively.
机译：该研究专用于对船舶燃气轮机进行双燃料低排放燃烧室中的工作过程的研究。作为研究的目的，选择了一种低排放式燃气涡轮燃烧室，其内部预混轴和内部和内径径向轴向旋流内的空气。该研究的方法基于微分方程系统的数值解，其代表了考虑氮氧化物形成和离散坐标的多组分化学反应性湍流系统的质量和节能和转化和物种传输的物理过程。辐射模型。化学动力学由燃烧的6步机制提出。已经分析了七种燃料供应操作模式，从100％的气态燃料到100％液体燃料。该分析揭示了应用计算流体动力学在浮动容器的燃气轮机设计中的双燃料燃烧室问题的可能性。此外，该研究表明，在不同的过渡气体和液体燃料供应模式下工作的可能性，因为它们满足现代生态要求。呈现了沿着低排放燃气涡轮机燃烧室的长度的平均温度，NO和CO浓度的依赖性，用于不同的燃料供应情况。取决于不同的操作模式，火焰管的出口横截面的氮氧化物NO和一氧化碳CO的计算出不同，但它们位于31-50和23-24mg / nm的范围内（ 3）在100％液体燃料供应模式的峰值上。在运行模式下，在气态燃料供应普遍，氮氧化物NO和一氧化碳CO排放分别位于1.2-4.0和0.04-18mg / nm（3）的范围内。

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