某航机燃烧室煤油改柴油燃烧特性研究

为了给某型航空发动机改为地面用柴油型燃气轮机的设计提供重要的技术支持,本文借助数值计算的方法,采用FLUENT稳态压力求解器、P1辐射模型和涡耗散破碎(EDU)燃烧模型对某航空发动机燃烧室在巡航工况和最大工况下煤油与柴油两种燃料的燃烧特性进行了计算及对比研究。得到了该燃烧室使用航空煤油(RP-3)和0号柴油的热态流场、空气流量分配、温度场、出口温度分布、污染物排放及头部燃油蒸发量。研究结果表明：当该燃烧室的燃料由航空煤油改为0号柴油后,燃烧室的热态温度场分布基本一致,流量分配最大差异在0.45%之内；燃烧效率降低约4.3%和NO、Soot排放量相当；出口温度分布和总压损失差异分别在1%和4.1%之内。

Study on combustion characteristics of an aeroengine combustor with kerosene into diesel

: In order to provide an important technical support for the design of an ground aeroderivative gas turbine with diesel oil.The combustion characteristics and comparative study for an aeroengine with kerosene and diesel oil was studied by using the FLUENT steady pressure solver, P1 radiation model and eddy dissipation breakup (EDU) in cruise condition and the maximum conditions. The flow field, flow distribution,temperature field, total pressure loss, outlet temperature distribution, pollutant and fuel evaporation process of combustor are obtained with aviation kerosene(RP-3)and #0 diesel oil.The results indicate that when the aviation kerosene is changed to #0 diesel oil, the distribution of hot temperature field is consistent and the maximum difference of flow distribution is within 0.45%:the combustion efficiency is reduced by about 4.3% and NO and Soot emissions are equal; the difference of the out temperature distribution and total pressure loss of the outlet are 1% and 4.1% respectively.The calculation results provide the important technical support for the design of an ground aeroderivative gas turbine with diesel oil.