煤油温度对于爆震波形成影响的实验研究

Experimental Investigation on Effects of Kerosene Temperature on Detonation Wave Formation

在内径为30mm的脉冲爆震发动机模型上,以煤油为燃料,以空气为氧化剂,成功地进行了两相爆震实验,获得了充分发展的脉冲爆震波。测试了在化学恰当比,不同爆震频率及燃油温度下的爆震波压力,并对其变化进行了分析。通过分析实验结果发现,在化学恰当比下,爆震频率不变时,煤油温度的升高明显促进了爆震的形成,在内径小于混合物胞格尺寸的爆震管内,可以形成充分发展的两相脉冲爆震波。

Using kerosene as fuel and air as oxidizer, two-phase detonation experiments were successfully conducted on a PDE model with its diameter 30mm. Fully developed repetitive C-J detonation waves were obtained in the experiments. Under stoichiometric ratio, various frequencies and fuel temperatures, the detonation pressures in the tube were measured, and the factors influencing detonation pressures were analyzed. The experimental results have shown that under stoichiometric ratio and for a given frequency, detonation initiations are promoted remarkably by means of increasing kerosene temperature. It＇ s found that successful two-phase pulse detonations can be achieved in tubes with the diameters less than cell sizes of mixtures.