Hydrogen-based fuels have become a primary interest in the gas turbine market. To better predict the reactivity of mixtures containing different levels of hydrogen, laminar and turbulent flame speed experiments have been conducted. The laminar flame speed measurements were performed for various methane and natural gas surrogate blends with significant amounts of hydrogen at elevated pressures (up to 5 atm) and temperatures (up to 450 K) using a heated, high-pressure, cylindrical, constant-volume vessel. The hydrogen content ranged from 50% to 90% by volume. All measurements were compared to a chemical kinetic model, and good agreement within experimental measurement uncertainty was observed over most conditions. Turbulent combustion experiments were also performed for pure H_2 and 50:50 H_2:CH_4 mixtures using a fan-stirred flame speed vessel. All tests were made with a fixed integral length scale of 27 mm and with a turbulent intensity level of 1.5 m/s at 1 atm initial pressure. Most of the turbulent flame speed results were in either the corrugated or thin reaction zones when plotted on a Borghi diagram, with Damkohler numbers up to 100 and turbulent Reynolds numbers between about 100 and 450. Flame speeds for a 50:50 blend of H_2:CH_4 for both laminar and turbulent cases were about a factor of 1.8 higher than for pure methane.
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机译：氢燃料已成为燃气轮机市场的主要兴趣。为了更好地预测含不同量氢的混合物的反应性，已经进行了层流和湍流火焰速度实验。使用加热，高压，圆柱形，恒定体积的高压（最高5 atm）和温度（最高450 K）对含大量氢气的各种甲烷和天然气替代混合物进行层流火焰速度测量血管。氢含量按体积计为50％至90％。将所有测量值与化学动力学模型进行比较，并且在大多数条件下都观察到实验测量不确定度内的良好一致性。还使用风扇搅拌的火焰速度容器对纯H_2和50:50 H_2：CH_4混合物进行了湍流燃烧实验。所有测试均使用固定的27 mm整体长度标尺和在1个大气压初始压力下的湍流强度水平为1.5 m / s进行。当在Borghi图上绘制时，大多数湍流火焰速度结果位于波纹反应区或稀薄反应区中，Damkohler数最大为100，湍流雷诺数大约为100至450。H_2以50:50混合的火焰速度：层流和湍流情况下的CH_4比纯甲烷高约1.8倍。
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