展向电磁力控制鱼雷模型湍流边界层减阻实验研究  

Experimental study on the drag reduction of torpedo model controlled by spanwise electromagnetic force

作　　者：徐驰[1] 周本谋[1] 黄亚冬[1] 李俊伟[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094

出　　处：《中国科技论文》2015年第17期2033-2035,2045,共4页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20133219110039)

摘　　要：为了减小高速鱼雷在发射过程中所受到的湍流黏性阻力(即摩擦阻力),提高鱼雷的性能,在鱼雷表面包覆电磁激活板,电磁场激励产生的展向电磁力(也称洛伦兹力)作用于鱼雷表面的湍流边界层,通过电磁体积力与湍流拟序结构的相互作用可以减小鱼雷受到的摩擦阻力;针对实验鱼雷模型,在装有盐水的水池(长25m×宽3m×高1.5m)中进行拖曳实验,实验鱼雷模型长1m,直径0.1m,头部结构为半球,尾部结构为锥体。实验结果表明:1m/s拖曳速度下(雷诺数的量级为106,特征长度为鱼雷模型长度),模型表面的流体边界层为湍流边界层,展向周期性电磁力控制作用后,鱼雷所受阻力减少17.47%,有一定的减阻控制效果。To improve the performance of the torpedo,drag reduction of a torpedo model via the interaction between spanwise electromagnetic force （or Loreztz force）and turbulent coherent structure is considered.Towing experiments of the torpedo model are carried out to investigate drag reduction in a brine tank （25 m length×3 m width ×1.5 m height）.The spanwise electromag-netic force is excited by the electromagnetic field from the electromagnetic actuator which is embedded in the surface of the torpe-do model.The torpedo model with 1 m length contains a 0.1 m diameter hemisphere head and a taper tail.Results show that the drag can be reduced by 17.47% at the dragging velocity 1.0 m/s （the magnitude of Reynolds number based on the tropedo model length was 106 ）.

关 键 词：流体力学 鱼雷模型 湍流边界层 展向电磁力 减阻 

分 类 号：O357.5[理学—流体力学]