为推进零碳燃料氨/氢掺混燃烧在燃气轮机中的应用,本文针对氨/氢燃料的掺混设计和燃烧性能开展研究。以氨/氢掺混燃烧设计为目标,以天然气的燃烧性能为参照,采用可靠的燃烧反应机理,在较宽工况范围和不同掺氢比下开展了氨/氢掺混燃烧特性及其可行性的数值研究,并确定了氨/氢混燃在燃气轮机中的合理配比。结果表明：在点火延迟时间、绝热火焰温度、火焰传播速度等典型基础燃烧特性的判据下,氨/氢燃料在掺氢比为40 % ~ 60 %范围内的燃烧性能与天然气相当；另外,氢气的掺混显著拓宽了氨气的稳定燃烧范围,同时系统分析了氨/氢燃烧过程中NO的生成路径以及影响燃烧温度和氨气的关键反应通道。然后基于基础燃烧仿真结果,在燃气轮机燃烧室模型中探究了氨/氢掺混燃烧的出口温度、NO浓度等性能,获取适用于燃气轮机的氨/氢燃料合理掺氢比为50%~55%。

To explore the application of ammonia/hydrogen blended combustion in zero-carbon gas turbines, this study investigates the blending design and combustion performance of ammonia/hydrogen fuel. With the target of designing ammonia/hydrogen blended combustion, and using natural gas combustion performance as a benchmark, reliable combustion reaction mechanisms are employed. Numerical studies on the characteristics and feasibility of ammonia/hydrogen blended combustion are conducted under various operating conditions and different hydrogen blending ratios, and a reasonable ratio of ammonia/hydrogen blend in gas turbines is determined. The results indicate that, based on criteria such as ignition delay time, adiabatic flame temperature, and flame propagation speed, the combustion performance of ammonia/hydrogen fuel within the hydrogen blending ratio range of 40% to 60% is comparable to natural gas. Furthermore, the inclusion of hydrogen significantly expands the stable combustion range of ammonia. The study also analyzes the generation pathways of nitrogen oxides (NO) during ammonia/hydrogen combustion, as well as the key reaction channels influencing combustion temperature and ammonia. Based on the results of basic combustion simulations, the study explores the performance of ammonia/hydrogen blended combustion in terms of outlet temperature and NO concentration in a gas turbine combustion chamber model, determining that a reasonable hydrogen blending ratio for ammonia/hydrogen fuel is between 50% and 55%.

V231.1

国家自然科学基金；河南省重点研发与推广专项（科技攻关）；河南省高等学校重点科研项目计划；2023年郑州航院研究生教育创新计划基金项目