初始压力对氢-空气预混诱导湍流燃烧的影响

发布时间：2018-03-29 12:44

本文选题：网孔板　切入点：定容燃烧弹　出处：《内燃机学报》2016年05期

【摘要】：在顶置点火定容燃烧弹内加入一个网孔板,采用纹影法和压力采集系统,研究不同初始压力下氢气-空气预混合气穿过网孔时的火焰传播特性以及压力特性.结果表明:火焰通过网孔板时产生射流,网孔间火焰相互干涉,火焰前锋面积增加,诱导成湍流燃烧;相对于未添加网孔板而言,最大燃烧压力值几乎不变,达到最大压力的时刻提前,燃烧持续期缩短;火焰穿过网孔板后,传播速度提高,压力升高率增加;随着初始压力的增加,添加网孔板后的燃烧持续期变化率先增大后减小,在初始压力为0.10,MPa时达到最大值.
[Abstract]:A mesh plate was added to the top ignited constant volume combustion bomb, and the method of schlieren and the pressure acquisition system were adopted. The flame propagation characteristics and pressure characteristics of hydrogen-air premixed gas passing through the mesh at different initial pressures are studied. The results show that the jet flow occurs when the flame passes through the mesh plate, and the flame interacts with each other between the meshes, and the front area of the flame increases. Compared with the plate without meshes, the maximum combustion pressure is almost constant, the time of reaching the maximum pressure is earlier, the combustion duration is shortened, the velocity of flame propagating through the mesh plate is increased, and the increasing rate of pressure is increased. With the increase of initial pressure, the change of combustion duration increases first and then decreases after adding mesh plate, and reaches the maximum when the initial pressure is 0.10 MPA.
【作者单位】：北京理工大学机械与车辆学院;北京电动车辆协同创新中心;
【基金】：高等学校学科创新引智计划资助项目(B12022)
【分类号】：TK401

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