【摘要】 在自行搭建的颗粒堆积多孔介质器中,以甲烷/空气为燃料,对多孔介质燃烧波传播过程中的"超焓"燃烧特性进行实验研究.在对比"超焓"与"非超焓"燃烧火焰温度的基础上,探讨不同当量比下燃烧波传播方向对"超焓"燃烧火焰温度的影响,对相应燃烧状态下的污染物排放特性进行比较.结果表明:随着当量比的升高,"超焓"燃烧状态下的火焰温度升高速率高于非"超焓"燃烧状态;燃烧波正向传播时,燃烧火焰温度超过绝热燃烧温度,出现"超焓"燃烧状态;燃烧波逆向传播时,燃烧火焰温度远低于绝热燃烧温度,出现"非超焓"燃烧状态;"超焓"状态下的CO排放体积分数低于"非超焓"燃烧,NOx排放体积分数相对较高.更多还原

【Abstract】 Super-adiabatic combustion in particle filled combustor was experimentally conducted by premixed methane/air mixtures under the different combustion wave propagation.The super-adiabatic combustion temperatures were compared with those of the under-adiabatic combustion at different equivalence ratio,in addition to the combustion emissions at corresponding conditions.The influence of combustion wave propagation direction on flame temperature of super-adiabatic combustion was analyzed at the certain operation conditions.Results show that the rate of flame temperature increase at superadiabatic combustion is much higher than that of the under-adiabatic combustion.The combustion temperature easily exceeds the adiabatic combustion temperature when the combustion wave propagates to the downstream,and the super-adiabatic combustion appears.The combustion temperature is less than the adiabatic combustion temperature easily when the combustion wave propagates to the upstream,and the under-adiabatic combustion appears.The CO emission at super-adiabatic combustion is lower than that of the under-adiabatic combustion at the certain operating conditions,but the NOxemission volume fraction is higher.更多还原