CAJ | 학술논문

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25 m×宽3 m×高1．5 m）中进行拖曳实验，实验鱼雷模型长1 m，直径0．1 m，头部结构为半球，尾部结构为锥体。实验结果表明：1 m／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。
위료감소고속어뢰재발사과정중소수도적단류점성조력（즉마찰조력），제고어뢰적성능，재어뢰표면포복전자격활판，전자장격려산생적전향전자력（야칭락륜자력）작용우어뢰표면적단류변계층，통과전자체적력여단류의서결구적상호작용가이감소어뢰수도적마찰조력；침대실험어뢰모형，재장유염수적수지（장25 m×관3 m×고1．5 m）중진행타예실험，실험어뢰모형장1 m，직경0．1 m，두부결구위반구，미부결구위추체。실험결과표명：1 m／s 타예속도하（뢰낙수적량급위106，특정장도위어뢰모형장도），모형표면적류체변계층위단류변계층，전향주기성전자력공제작용후，어뢰소수조력감소17．47％，유일정적감조공제효과。
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 ).