介质阻挡放电等离子体增强引擎燃烧技术的初步研究

Study of Dielectric Barrier Discharge Nonequilibrium Plasma-assisted Combustion for More Efficient Engine

非平衡等离子体技术在增强引擎燃烧效率,降低废气排放方面有着巨大的应用潜力,而介质阻挡放电是获得较大体积和较均匀分布非平衡等离子体一种有效方式。为此,详细论述了非平衡等离子体对燃料或助燃气活化作用的基本原理。基于管管结构介质阻挡放电的特点,提出了增强引擎燃烧效率的非平衡等离子体发生器主体结构方案,从理论上阐明了设计方案的可行性。以此方案设计了等离子体发生器,并开展了丙烷燃烧实验,结果表明非平衡等离子体在很大程度上能够改善有机燃料的燃烧状况,使之燃烧得更加充分,有效地验证了非平衡等离子体增强燃烧技术应用于提高引擎燃烧效率的可行性。

The principle of activation of fuel or air by nonequilibrium plasmas is presented,and the probable process of formation of excited components that support the chain propagation reactions is discussed.The main body frame of nonequilibrium plasma reactor is put forward based on characters of the dielectric barrier discharge equipment with tube-tube configurations,and the feasibility of the design scheme is theoretically elucidated.Experiments on propane combustion were carried out using the nonequilibrium plasma reactor we designed.The experimental results show that nonequilibrium plasma can improve hydrocarbon combustion,and make it to be burnt more completely.The technology of nonequilibrium plasma-assisted combustion for more efficient engine is validated effectively.