The flamevelocity of flammable gas deflagration in a large closed vessel has an accelerating process, and the pressure distribution is not homogeneous.
大型密闭容器内可燃气体爆燃的火焰速度存在着一个加速过程，压力也不是均匀分布的。
2
The hypersonic velocity of the flame shortens the time of interaction between the powder and flame, while the low temperature of flame limits the grain growth and decomposition of coating.
火焰的高超声速速度缩短了粉末与火焰之间的相互作用时间，而火焰也促使了颗粒增长和涂层分解的低温限制。
3
To express the effects of flame stretch upon burning velocity, Markstain numbers has been obtained from the measurement of flame speed.