The existing scientific and technical results in the field of methane-air flames stabilization by adding hydrogen under various gravitational conditions were analyzed in relation to ensuring the safe operation of rocket and space power plants. Experimental setup was created for the purpose of studying the combustion stability of such fuel compositions under the various gravity conditions. The extended ranges of stable combustion rates were obtained experimentally at different percentages of hydrogen added to methane-air mixture under the both normal and reverse gravity conditions. The existence of a lean methane-hydrogen-air flame under reverse gravity in contrast to normal gravity conditions was observed. The influence of hydrogen addition on the dynamics and flame shape at such conditions was studied. The greater influence of hydrogen in ensuring stable combustion of a lean flame under reverse gravity than under normal gravity was demonstrated. Furthermore, the findings substantiated the rationale for utilizing hydrogen to expand the operational stability of burner devices.

中文翻译：

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加氢对正常重力和反重力下甲烷-空气燃烧的影响


分析了在各种重力条件下通过添加氢气稳定甲烷-空气火焰领域的现有科技成果，以保证火箭和航天发电厂的安全运行。创建实验装置的目的是研究此类燃料成分在各种重力条件下的燃烧稳定性。在正常重力和反向重力条件下，在甲烷-空气混合物中添加不同百分比的氢气时，通过实验获得了稳定燃烧速率的扩展范围。观察到在反重力下与正常重力条件相比存在稀薄的甲烷-氢气-空气火焰。研究了在这种条件下加氢对动力学和火焰形状的影响。氢气在确保反重力下稀薄火焰稳定燃烧方面的影响大于在正常重力下。此外，研究结果证实了利用氢气来扩大燃烧器设备运行稳定性的基本原理。