Abstract: To investigate the effects of initial fuel temperature on the performance of two-phase detonation， experiments under different fuel temperature conditions from 30℃ to 200℃ were conducted in a 24mm detonation tube at 10Hz， utilizing kerosene and oxygen as fuel and oxidant， respectively. The results show that， with the rise of the initial temperature of fuel， the steady propagation velocity of the flame front increases gradually， the combustion stability increases， the two-phase detonation peak pressure increases， the detonation initiation distance reduces. In addition， the observation of detonation tail flame at different initial fuel temperatures shows that， with the increase of fuel temperature， both the total pressure of unsteady exhaust process and the thrust available for the engine increase.

Key words: Initial temperature of fuel;Wave velocity;Distance of deflagration to detonation transition;Mach disk;Total pressure of exhaust gas

摘要： 为研究燃油初温对两相爆震性能的影响，在24mm内径爆震管中，以30~200℃的不同初温煤油为燃料，氧气为氧化剂，成功进行了10Hz的两相爆震实验。实验发现，随着燃油初温的升高，火焰锋面的稳态传播速度逐渐增大，爆震燃烧的稳定性逐渐提升，两相爆震峰值压力增大，起爆距离缩短。此外对不同燃油初温下的爆震燃烧尾焰观测表明，油温升高后，非稳态排气总压增大，发动机可获取的推力增大。

关键词: 燃油初温;波速;起爆距离;马赫盘;排气总压