Abstract The interest in alternative fuels has increased in recent years. Because, the conventional fuels have the danger of extinction in the near future and these fuels harm the environment. Therefore, in this study, the availability of hydrogen as an alternative fuel has been investigated in the tubular combustion chamber of a gas turbine engine fueled by jet-A fuel. For this purpose, the combustion characteristics in the combustor of a Rolls-Royce Nene turbojet engine fueled by gas jet-A and hydrogen have been numerically studied at different excess air ratios (EAR) for a given thermal power values. Temperature distributions in the combustor, combustion efficiency, pressure drop and velocity change have been numerically analyzed at 1480 kW (10000 rpm), 2290 kW (11000 rpm) and 2980 kW (12000 rpm) thermal power in the combustion chamber. The RNG k- turbulence and eddy-dissipation combustion models have been used for 2D axisymmetric geometry with swirling flow. The combustion efficiency and the pressure drop values are increasing with an increase in the EAR values. But, the outlet temperature values of the combustion chamber, the CO2 emissions and unburned HC emissions are decreasing by increasing of the EAR values. Moreover, it is observed that the NOx emission values are increasing and then are decreasing with the EAR values. The combustion of hydrogen is seen as advantageous in terms of pressure drop, temperature values at the combustion chamber outlet and CO2 and unburned HC emissions. In addition, it can be seen that as advantageous in terms of the NOx emission values at low EAR values but as disadvantageous at high EAR values.

中文翻译：

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氢燃料燃气轮机燃烧室与喷气A燃料对比的数值分析

摘要 近年来，人们对替代燃料的兴趣有所增加。因为，传统燃料在不久的将来有灭绝的危险，而且这些燃料会危害环境。因此，在这项研究中，在以喷气 A 燃料为燃料的燃气涡轮发动机的管状燃烧室中，研究了氢气作为替代燃料的可用性。为此，在给定的热功率值下，在不同的过量空气比 (EAR) 下，以气体喷射 A 和氢气为燃料的 Rolls-Royce Nene 涡轮喷气发动机的燃烧器中的燃烧特性进行了数值研究。燃烧室中的温度分布、燃烧效率、压降和速度变化已经在燃烧室的 1480 kW (10000 rpm)、2290 kW (11000 rpm) 和 2980 kW (12000 rpm) 热功率下进行了数值分析。RNG k-湍流和涡耗散燃烧模型已用于具有旋流的二维轴对称几何。燃烧效率和压降值随着 EAR 值的增加而增加。但是，燃烧室的出口温度值、CO2 排放量和未燃烧的 HC 排放量随着 EAR 值的增加而降低。此外，观察到 NOx 排放值随着 EAR 值的增加而下降。氢气燃烧在压降、燃烧室出口处的温度值以及 CO2 和未燃烧的 HC 排放方面被认为是有利的。此外，可以看出，在低 EAR 值下的 NOx 排放值方面有利，但在高 EAR 值下不利。