图表示不同反应物流量下焰流速度与轴向距离的关系。煤油与氧气在燃烧室内部燃烧，经过拉瓦尔喷嘴与氮气充分混合并形成超音速焰流。受激波现象的影响，焰流速度在拉瓦尔喷嘴扩张段与喷枪管口自由射流区均出现锯齿状波动，最后在一定喷涂距离后快速衰减。根据拉瓦尔喷嘴喉部气体函数关系以及上节中对焰流温度的分析，较高的煤油与氧气流量可以提供较高的焰流温度，因此也一定程度上提高了焰流的速度。

The graph represents the flame flow velocity versus axial distance for different reactant flow rates. The kerosene and oxygen are burned inside the combustion chamber, and are fully mixed with nitrogen through the Laval nozzle and form a supersonic flame flow. Affected by the excitation phenomenon, the flame velocity in the expansion section of the Laval nozzle and the free jet area of the nozzle nozzle both appear jagged fluctuations, and finally decay rapidly after a certain spraying distance. According to the Laval nozzle throat gas function relationship and the analysis of the flame temperature in the previous section, higher kerosene and oxygen flow can provide a higher flame temperature, and therefore also to a certain extent to increase the flame speed.