Based on the known calculated and experimental data on distribution of temperature and gas compositions near the flame front in jets, it is shown that the nature of a change in the total enthalpy during combustion of mixed and unmixed reagents depends on the molecular properties of gases to different extents, but in the same way. Systems with Lewis numbers less than one have a maximum in the enthalpy profile; if the Lewis number is greater than one, a minimum appears near the flame front. Data on heat fluxes associated with thermal conductivity and diffusion are obtained. It has been found that during combustion of unmixed reagents, the heat flux carried by diffusion is an order of magnitude less than the flux carried by thermal conductivity. For mixed reagents, the heat fluxes carried by diffusion and thermal conductivity exceed the heat fluxes in the flame of unmixed reagents.

根据已知的关于射流中火焰前沿附近温度和气体成分分布的计算和实验数据，表明混合和未混合试剂燃烧过程中总焓的变化性质取决于气体的分子性质。程度不同，但方式相同。Lewis数小于1的系统的焓分布最大。如果Lewis数大于1，则在火焰前缘附近出现最小值。获得与热导率和扩散相关的热通量数据。已经发现，在未混合试剂的燃烧过程中，扩散所携带的热通量比导热率所携带的热通量小一个数量级。对于混合试剂，