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对GE-F101型工业燃气轮机环形燃烧室燃用甲烷和低热值合成气的燃烧性能进行了数值研究,采用标准k-ε湍流模型和涡耗散湍流燃烧模型对燃烧室在不同燃料条件下的流场特性进行了数值模拟,并对燃烧室内的流场结构、温度分布、火焰结构及NOx分布进行了分析与比较;在此基础上对原燃烧室进行了一些改造.结果表明:随着燃料热值的降低,燃料射流速度增大,燃料和空气的混合程度减弱,燃烧稳定性降低,燃烧室内最高温度降低,NOx排放量减少;通过增大燃料喷嘴口径和增加旋流器的旋流数,可在一定程度上改善燃烧室内流动结构,增强燃料和空气的混合程度,因而提高了燃烧稳定性.
The combustibility of methane and low calorific value syngas for GE-F101 industrial gas turbine annular combustor was numerically studied. The standard k-ε turbulence model and eddy-current turbulent combustion model were used to simulate the combustor flow under different fuel conditions Field characteristics were simulated and the flow field structure, temperature distribution, flame structure and NOx distribution in the combustion chamber were analyzed and compared. Based on the above analysis, some modifications were made to the original combustion chamber.The results showed that with the increase of fuel heat The fuel jet velocity increases, the degree of mixing of fuel and air decreases, the combustion stability decreases, the maximum temperature in the combustion chamber decreases, and the NOx emission decreases. By increasing the diameter of the fuel nozzle and increasing the swirl number of the swirler, It can improve the flow structure in the combustion chamber to a certain extent and enhance the mixing degree of fuel and air, thus improving the combustion stability.