狭缝内C2H4/O2预混气的起爆与速度亏损

受限通道内的预混气起爆与传播受外界因素影响较大,如初始压力、通道尺寸等。通过自制不同高度的狭缝通道,考察了狭缝高度和初始压力对C_2H_4/O_2可燃预混气起爆特性及传播过程的影响。结果发现:改变初压和狭缝高度确实对预混气起爆有较大影响,尤其是狭缝高度的不断降低可能获得不同于常规管道的DDT特性;爆轰波的速度亏损同时与初压和狭缝高度有关,其值正比于H~(-0.8)P_0~(-0.5)。考虑到实验结果的局限性,后续还需进行多次重复实验,以获得更加准确的实验数据。

(b)Detonation Initiation and Velocity Deficit of C2H4/O2 Premixed Gas in Narrow Gap

Detonation initiation and propagation of premixed gas in the confined channel are greatly influenced by external factors, such as initial pressure, channel size, etc. Using the self-made narrow gap with different heights, influences of different initial pressures and heights on detonation initiation characteristic and propagation process of C₂H₄/O₂ combustible premixed gas were investigated. The results show that different initial pressures and gap heights does have great influence on detonation initiation, especially the continuous decrease of gap height may shows different DDT characteristics of the conventional channel. In addition, velocity deficit of detonation wave is bound up with initial pressure and gap height at the same time, and the deficit value is proportional to . Considering the limitations of the experimental results, in order to obtain more accurate experimental data, they need to be repeated in the following experiment.