为了提高能源转换效率、降低燃烧副产物的排放,利用电场增强燃烧、控制燃烧火焰特性已逐渐引起研究人员的注意.本文从竖向、横向(即径向)和单电极式等不同的电场形式对燃烧场的影响展开论述.不同的电场形式下,通过改变电场参数,对电场中不同燃料的燃烧火焰特性变化规律进行研究,以此考查电场与燃烧耦合时的特性.研究表明,利用竖向电场力来平衡浮力可以粗略模拟微重力下燃烧时的扩散火焰,燃烧速率受电场强度影响,4kV时最小;利用横向电场可以改变火焰形状(如高度降低)及颜色,也可以助燃低热值燃料,实现可靠点火和稳定燃烧;对于单极式电场,观察到3种不同类型的振荡火焰.然后,对利用电场降低燃烧副产物的可行性进行了阐述.最后指出,迄今未见对不同电场形式与燃烧火焰特性的系统研究,缺乏相应的基础数据、电场参与下的燃烧反应动力学模型以及完备的燃烧场耦合机制分析.

Recently, in order to improve energy translation effect and decrease the emission of combustion byproducts, many researchers have gradually paid attention to enhance combustion and control combustion flame by utilizing an electric field. The effect of different electric fields, such as vertical electric field, horizontal (or radial) electric field, scattered (viz single electrode) electric field, and alternation electric field, etc, on various fuel combustion flame characters were firstly discussed. Secondly, the feasibility for decreasing combustion byproducts by using the electric field was described. Finally, up to now, the complete research on the relation between different electric fields and the combustion flame characters does not exist. Its relative base data, perfect mechanism analysis, and combustion reaction dynamics with electric field are lack of. Enhancing combustion and controlling combustion flame by utilizing various electric fields possesses the practical significance for saving energy and reducing emission.