This paper reports on the theoretical and experimental studies of combustion in a bidirectional swirling flow to develop its criterion base. Based on considering known aero‐thermochemical similarity criteria, turbulent combustion numbers were calculated for the bidirectional vortex combustor for the first time. Theoretical assessment and experimental studies of the probability of the known combustion mechanisms' implementation in a limited bidirectional swirling flow, containing the secondary flows and separation phenomena, were performed. This gave us a possibility to provide the new correlation of combustion mechanisms with emission dependencies. A joint review of these data allowed us to establish that the greatest environmental efficiency is observed in the range of the air‐fuel equivalence ratio of 1.5 < λ < 1.9. At the same time, it was defined that stable combustion of liquid fuel in the bidirectional swirling flow is available up to the value λ = 22. Moreover, criterion equations for lean and rich limits of stable combustion were obtained.

中文翻译：

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双向旋流燃烧机理的判据分析与实验研究及其与污染物排放的关系

本文报道了在双向旋流中燃烧的理论和实验研究，以发展其标准基础。在考虑已知的航空热化学相似性标准的基础上，首次计算了双向涡流燃烧器的湍流燃烧数。对包含次级流和分离现象的有限双向旋流中已知燃烧机制的实施可能性进行了理论评估和实验研究。这使我们有可能提供燃烧机制与排放相关性的新关联。通过对这些数据的共同审查，我们可以确定，在空燃当量比为1.5 < λ的范围内，可以观察到最大的环境效率。  <1.9。同时，定义了双向旋流中液体燃料的稳定燃烧，直到值λ = 22为止。而且，获得了稳定燃烧的稀薄和浓限的标准方程式。