Abstract

Difference in the molar masses of a combustible gas and its combustion products has a strong effect on a flame temperature and a burning rate. Instead of a molar mass difference, one may consider a heat capacity difference at a constant pressure. There are two heat sources in a combustion zone. One of them is chemical, and the other one is similar to heat release (heat absorption) during a first-order phase transition, but, depending on the process, it can be partially chemical. The higher the heat capacity of the fuel in comparison with the heat capacity of the combustion products, the higher the burning rate and the flame temperature. For the physical completeness of the issue under discussion, an ideal thermodynamic cycle is considered, and it is shown that Carnot’s formula should contain a correction factor that takes into account a change in heat capacity.

中文翻译：

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摩尔质量变化对火焰温度和燃烧速率的影响

摘要

可燃气体及其燃烧产物的摩尔质量的差异对火焰温度和燃烧速率有很大的影响。代替摩尔质量差，可以考虑恒定压力下的热容差。燃烧区有两个热源。其中一个是化学的，另一个类似于一阶相变过程中的放热（吸热），但是根据过程的不同，它可能是部分化学的。与燃烧产物的热容量相比，燃料的热容量越高，燃烧速率和火焰温度越高。为了所讨论问题的物理完整性，考虑了理想的热力学循环，