电飘机升力机制和效率的研究

Investigation of the lifter's lift mechanism and efficiency

实验测量了电飘机在不同电压和电极几何参数情况下的升力值.采用离子风现象解释了电飘机的升力机制,在此基础上利用一维电流体动力学方法推导了升力和升力效率的公式.理论分析结果和实验值吻合良好,电飘机中升力的来源依赖于电晕电流的形成,并与电晕电流的大小相关.在电压不太高时,升力大小随电压的升高而增大,并大致呈抛物线关系,与电极间距成反比关系,与电极长度成正比关系.分析了空气参数对电飘机升力和效率的影响,发现减小离子在空气中的迁移率是提高效率的有效方法,但同时降低了升力.分析了电飘机的应用前景.

The lift force of the lifter were measured with different voltage and geometry between electrodes.The ionic wind explanation of the lifter＇s flying was given and the formulas of the lifter＇s lift and efficiency was deduced based on it with an one dimensional electrohydrodynamic（EHD） method.The theoretical results agree with the present experimental results.The lift force generation and its magnitude depends on the corona discharge current.When the voltage between the electrodes is not very high,the magnitude of the lift fore is parabolic to the voltage,proportional to the distance between the electrodes,and inverse proportional to the length of the electrodes.The influence of the parameters on the lift force and efficiency of the lifter was analysed according to the theoretical formulas.The lifter＇s efficiency can be improved by reducing the ion drift velocity while the lifter force is reduced.The lifter＇s performance is compared with that of the present propulsion systems and it indicates the lifter＇s thrust power ratio is greater while its efficiency and thrust weight ratio is smaller.Thus the lifter can be only developed as an auxiliary aviation propulsion system.