摘要
使用带基元化学反应的多组分Navier-Stokes方程,数值研究了多点连续点火过程诱导氢气-空气预混合气体的爆轰过程.计算结果表明,点火时序的变化可以显著影响预混气的爆轰引发特性.适当的加速连续点火过程可以诱导爆轰的形成,且随着点火过程的加速,爆轰的形成时间和距离均有所缩短;减速或过快的连续点火过程则不能诱导爆轰的形成.
Based on the multi-component Navier Stokes equations with elementary reactions, a detonation initiation process of stoichiometric hydrogen-air mixtures induced by successive ignition was investigated numerically. The computational results show that the detonation initiation strongly depends on the ignition timing. Appropriate acceleration of successive ignition timing can initiate detonation. The time and distance of the detonation initiation can be shortened by increasing the ignition velocity, while in the case of deceleration or over-acceleration of the successive ignition timing, detonation initiation cannot occur.
基金
国家自然科学基金(50476027)资助.
关键词
爆轰引发
连续点火
点火时序
数值模拟
detonation initiation
successive ignition
ignition timing
numerical simulation
