DMMP对二甲醚层流预混火焰的影响研究

二甲醚(DME)作为可再生的清洁燃料,因为其优越的性能而越来越受关注,但与此同时其燃烧的安全性却容易被忽视。自蒙特利尔议定书以后,含磷化合物成为抑制碳氢化合物火焰最理想的卤代烷替代物,选取甲基磷酸二甲酯(DMMP)应用于二甲醚火焰,基于分层结构首次构筑了DME/DMMP详细化学反应机理。通过模拟研究发现,DMMP对DME层流预混火焰表现出与碳氢火焰同样明显的抑制作用。进一步进行火焰抑制机理分析,结果显示DMMP对DME层流火焰的抑制主要是因为PO_2和HOPO的循环反应促进了H和OH重组,同时得出DMMP对DME富燃火焰抑制更有效的结论。

Effect of DMMP on laminar premixed flame of dimethyl ether

As a renewable and clean fuel, Dimethyl ether (DME) has being paid more and more attention because of its superior performance, but at the same time the safety of its combustion is easily overlooked. After the Montréal Conventions, the phosphorus-containing compounds become the best halide alternatives for the inhibition of hydrocarbon flame. In this paper, DMMP was applied to the DME flame, and the reaction mechanism based on the layered structure of DME/DMMP was proposed for the first time. The simulation results indicated that the pre-mixed flame of DME and DMMP showed the same obvious inhibition as the hydrocarbon flame. The flame suppression mechanism was further analyzed and the results showed that the inhibition of the DME laminar flame is mainly due to the cycle reaction of PO2 and HOPO which promotes the recombination of H and OH. At the same time, DMMP is more effective for the suppression in rich DME flame.