沼气成分对微型燃气轮机燃烧室影响的数值分析
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摘要
为了探究沼气成分的变化对微型燃气轮机燃烧室性能产生的影响,对微型燃气轮机环形燃烧室在不同成分沼气条件下的流动及燃烧过程进行了数值分析,得到了燃烧室内部的压力、温度及污染物生成量等参数,并对比了在不同甲烷含量的沼气下,燃烧室燃气侧的来流参数、内部温度和污染物分布以及出口参数的变化。计算结果表明:为保证微型燃气轮机的热负荷,燃气中甲烷含量的降低将增大燃气侧的流量以及压力。而燃气中二氧化碳含量的增加,增大了燃烧室内的高温区域面积以及温度梯度,并影响了燃烧反应的充分进行,增加了NO_x与CO的生成量。
In order to explore the influence of methane composition on the combustor of micro gas turbine, the flow and combustion processes in the annular combustor of micro gas turbine were numerically analysed under the various fuel components. The parameters such as pressure, temperature and pollutant generation in the combustor were obtained. The change of fuel flow, temperature and pollutant distribution and export parameter was also investigated. The results show that to maintain the thermal load of micro gas turbine, the decrease of CH_4 in fuel will increase the flow and pressure of fuel. In addition, the rise of CO_2 in fuel increases the high temperature area and temperature gradient in the combustor, affects the process of complete combustion, and then adds the formation of NO_x and CO.
In order to explore the influence of methane composition on the combustor of micro gas turbine, the flow and combustion processes in the annular combustor of micro gas turbine were numerically analysed under the various fuel components. The parameters such as pressure, temperature and pollutant generation in the combustor were obtained. The change of fuel flow, temperature and pollutant distribution and export parameter was also investigated. The results show that to maintain the thermal load of micro gas turbine, the decrease of CH_4 in fuel will increase the flow and pressure of fuel. In addition, the rise of CO_2 in fuel increases the high temperature area and temperature gradient in the combustor, affects the process of complete combustion, and then adds the formation of NO_x and CO.
引文
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[4] 张倩倩, 薄泽民, 桑振坤, 等. 以生物质气为燃料的微型燃气轮机运行特性分析[J]. 热能动力工程, 2016, 31(3): 44-49+137-138.
[5] 吴旺松, 翁一武. 使用不同生物质气的微型燃气轮机性能分析[J]. 华东电力, 2012, 40(9): 1603-1606.
[6] 张巍, 翁一武, 刘爱虢. 生物质气微型燃气轮机燃烧室的数值模拟[J]. 热能动力工程, 2009, 24(1): 100-104.
[7] 肖云峰, 文双娜, 周秀博, 等. 沼气微型燃气轮机热力循环特性的仿真模拟[J]. 北京石油化工学院学报, 2017, 25(04): 36-41.
[8] 宗超, 朱彤. 某100 kW微燃机燃烧室结构优化及数值模拟[J]. 燃烧科学与技术, 2017, 23(1): 68-74.
[9] 王福珍, 刘石, 任晓辰, 等. 微燃机富氧燃烧室NOx排放的数值研究[J]. 华东电力, 2014, 42(2): 406-411.
[2] CHEN L, ZHAO L, REN C, et al. The progress and prospects of rural biogas production in China[J]. Energy Policy, 2012, 51: 58-63.
[3] RIST J F, DIAS M F, PALMAN M, et al. Economic dispatch of a single micro-gas turbine under CHP operation[J]. Applied Energy, 2017, 200: 1-18.
[4] 张倩倩, 薄泽民, 桑振坤, 等. 以生物质气为燃料的微型燃气轮机运行特性分析[J]. 热能动力工程, 2016, 31(3): 44-49+137-138.
[5] 吴旺松, 翁一武. 使用不同生物质气的微型燃气轮机性能分析[J]. 华东电力, 2012, 40(9): 1603-1606.
[6] 张巍, 翁一武, 刘爱虢. 生物质气微型燃气轮机燃烧室的数值模拟[J]. 热能动力工程, 2009, 24(1): 100-104.
[7] 肖云峰, 文双娜, 周秀博, 等. 沼气微型燃气轮机热力循环特性的仿真模拟[J]. 北京石油化工学院学报, 2017, 25(04): 36-41.
[8] 宗超, 朱彤. 某100 kW微燃机燃烧室结构优化及数值模拟[J]. 燃烧科学与技术, 2017, 23(1): 68-74.
[9] 王福珍, 刘石, 任晓辰, 等. 微燃机富氧燃烧室NOx排放的数值研究[J]. 华东电力, 2014, 42(2): 406-411.