电脉冲除冰系统的电磁场分析  

Electromagnetic Field Analysis for Electro-Impulse De-icing System

作　　者：李清英[1] 白天[1] 朱春玲[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2011年第1期95-100,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(10972106)资助项目

摘　　要：针对NASA CR-4175试验电脉冲除冰系统,建立了该系统的电磁场涡流有限元分析模型,分析了试验蒙皮在涡流场中法向及径向的磁感应强度,采用麦克斯韦应力法计算了该蒙皮所受的瞬态电磁力,并与Hender-son模型计算结果以及实验测量值进行了拟合偏差比较。同时在不改变电路的情况下,研究了蒙皮厚度、蒙皮电导率、蒙皮-线圈间隙这3个因素对电脉冲除冰效果产生的可能影响。结果表明,电磁场涡流有限元分析模型所计算的磁感应强度比Henderson模型更吻合实验值;趋肤深度范围内的试验蒙皮厚度愈大、蒙皮电导率愈大、蒙皮-线圈间隙愈小,蒙皮所受的峰值脉冲力愈大,即意味着这些参数条件下的除冰效果将更佳。A finite element analysis for modeling the electromagnetic eddy current of the electro-impulse de-icing（EIDI） system is presented for the system of NASA CR-4175.The normal magnetic induction intensity and radial magnetic induction intensity in the eddy current field are numerically analyzed,followed compared results of Henderson model with experimental data.Then,the instant electromagnetic force exerted on the testing skin is calculated by Maxwell stress tensor method.Meanwhile,the factors influencing de-icing, such as skin thickness,skin conductivity and skin-to-coil gap,are studied.Results indicate that the calculations on the magnetic induction intensity in this model agree better with experimental results than those in Henderson model.The thicker the skin is within electrical skin depth,the higher the conductivity of testing skin is,and the smaller the skin-to-coil gap is,the larger the peak impulse force is in the same circuit,thus it predicts effective ways for EIDI system to remove ice.

关 键 词：电脉冲除冰系统 涡流模型 麦克斯韦应力法 影响因素 峰值脉冲力 

分 类 号：V244.1[航空宇航科学与技术—飞行器设计]