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| 1 | 氨气燃烧强化措施及NO_(x)控制策略研究进展显示文摘根据常规条件下几乎无法实现氨气的稳定燃烧,而掺烧其他燃料、部分预分解燃烧、增氧燃烧、预热燃烧及强化混合,能够显著改善氨气的着火和燃烧特性、强化燃烧的特性,总结了氨气燃烧强化的主要措施.汇总氨气燃烧NO_(x)生成特性,对于NO_(x)排放,当量比起着决定性作用.贫燃条件下,氨气燃烧NO_(x)排放比常规碳氢燃料高一个数量级,且燃烧强化措施会引起NO_(x)排放进一步增加;富燃条件下,NO_(x)排放低,但存在氨逃逸的风险.空气分级、掺氢贫燃预混燃烧及中度和重度缺氧(MILD)燃烧能够实现低NO_(x)排放.充分利用氨气自身对NO_(x)的高效还原能力,通过合理的燃烧组织控制局部当量比,有望实现氨气燃烧NO_(x)有效控制. | 范卫东 陈钧 | 2022 | 华中科技大学学报(自然科学版)2022，50，7： | 3 |
| 2 | Reduced Methane Combustion Mechanism and Verification,Validation,and Accreditation(VV&A)in CFD for NO Emission Prediction显示文摘In order to obtain a reduced methane combustion mechanism for predicting combustion field and pollutants accurately in CFD simulations with a lower computational cost,a reduced mechanism with 22 species and 65 steps of reactions from GRI-Mech 3.0 was obtained by direct relation graph method and sensitivity analysis.The ideal reactor calculation and VV&A(Verification,Validation,and Accreditation)in CFD were carried out using the proposed mechanism.The results showed that the proposed mechanism agrees well with the detailed mechanism in a wide range of operating conditions;the temperature field and species can be predicted accurately in CFD simulations(RANS and LES models),and the NO prediction error of an industrial gas turbine combustor outlet is less than 2×10-6.The proposed mechanism has high engineering values. | SUN Jihao ZHANG Zhihao LIU Xiao ZHENG Hongtao | 2021 | Journal of Thermal Science2021，30，2： | 2 |
| 3 | Combustion Wave Propagation of a Modular Porous Burner with Annular Heat Recirculation显示文摘A numerical investigation of the different arrangements of porous media in a combustor with annular heat recirculation is conducted.The effect of annular heat recirculation and porous block arrangement on the characteristics of combustion wave propagation is numerically studied.Results show that power input,heat capacity of porous matrix,arrangement of porous blocks,and annular heat recirculation are major factors that influence the propagation of combustion wave.The overall temperature of ceramic porous burner is higher than that of ceramic-metal type burner due to the lower heat storage capacity of the former,especially for the temperature downstream.The flame temperature is higher upstream and lower downstream with metal foams in the annulus than that without metal foams.The flame temperature of uniformity type burner is more uniform than that of gradually-varied and modular type burners.The flame front moves more slowly with metal foams in the annulus than that without metal foams due to the better preheating effect of metal foams.The flame position moves downstream,and the flame temperature gradually decreases and is eventually extinguished due to the low preheating temperature. | SONG Fuqiang WEN Zhi FANG Yuan WANG Enyu LIU Xunliang | 2020 | Journal of Thermal Science2020，29，1： | 2 |
| 4 | 稀薄氨气的燃烧特性及动力学研究显示文摘文章通过稀薄氨气在固定床反应器中的燃烧,研究了反应温度、停留时间、氨气浓度和氧气浓度对低浓度氨气燃烧特性的影响,并描述了氨气在氧气过量条件下在陶瓷蜂窝蓄热体中燃烧的动力学过程。研究结果表明:提高反应温度、延长停留时间以及增大氧气浓度和氨气浓度均可以提高NH3转化率,氧气浓度过高会促进NO生成;当反应温度为740~770℃、氨气浓度为1%、氧气浓度为15%时,氨气在陶瓷蓄热体中燃烧的活化能为253.56 kJ/mol;与氨气在自由空间内的燃烧相比,氨气在陶瓷蜂窝蓄热体中主要发生表面燃烧反应。 | 苏嘉明 李先春 李艳鹰 王焕然 李伯阳 邱爽 | 2021 | 可再生能源2021，39，1： | 1 |
| 5 | Study on the Effects of Dome Fuel Distribution Ratio on Lean Blowout of a Model Combustor显示文摘The experimental studies and numerical simulation were conducted on the effects of the dome fuel distribution ratio on the lean blowout of a model combustor.The experimental results indicate that as the key parameter,the dome fuel distribution ratio,increases from 2.06%to 16.67%,the lean blowout equivalence ratio declines obviously at the beginning,and then the decrease slows down,in addition,the amplitude of the pressure fluctuation in the combustor reduces significantly while the dominant frequency keeps basically constant.In order to analyze the experimental results,the numerical simulation is adopted.The temperature and local equivalence ratio distributions are employed to explain the reason why the lean blowout performance improves with the increase of the dome fuel distribution ratio. | SHEN Xiaoming YUAN Yixiang ZENG Detang XIE Pengfu TAN Chunqing | 2020 | Journal of Thermal Science2020，29，1： | 0 |
| 6 | 基于DRGEPSA方法的甲烷燃烧简化机理的构建及验证显示文摘采用耦合误差传播和敏感性分析的直接关系图(DRGEPSA)法,对甲烷燃烧详细反应机理(Gri Mech 3.0机理)进行了简化,构建出了一套含有23种组分和110步基元反应的简化机理。为验证该简化机理的合理性和可靠性,采用充分搅拌反应器模型和一维层流预混反应器模型分别对甲烷燃烧反应过程进行模拟,并对温度和组分摩尔分数分布进行了对比分析。结果显示:利用简化机理分析得到的预测数据与详细机理吻合良好。结合该简化机理,建立了二维数值模型对带伴流的甲烷/空气Flame D进行数值模拟仿真研究,流场的温度和组分分布均与实验值吻合度较好,进一步表明所提甲烷燃烧简化机理具有较高的模拟精度。 | 徐传义 邵亚丽 卢平 宋涛 张海楠 黄震 | 2022 | 上海电力大学学报2022，38，5： | 0 |
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