熊天红, 易文俊. 高速射弹超空泡减阻试验研究与数值模拟分析[J]. 工程力学, 2009, 26(8): 174-178.
引用本文: 熊天红, 易文俊. 高速射弹超空泡减阻试验研究与数值模拟分析[J]. 工程力学, 2009, 26(8): 174-178.
XIONG Tian-hong, YI Wen-jun. EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF SUPERCAVITY DRAG REDUCTION OF A HIGH SPEED PROJECTILE[J]. Engineering Mechanics, 2009, 26(8): 174-178.
Citation: XIONG Tian-hong, YI Wen-jun. EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF SUPERCAVITY DRAG REDUCTION OF A HIGH SPEED PROJECTILE[J]. Engineering Mechanics, 2009, 26(8): 174-178.

高速射弹超空泡减阻试验研究与数值模拟分析

EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF SUPERCAVITY DRAG REDUCTION OF A HIGH SPEED PROJECTILE

  • 摘要: 为了研究超空泡形态下高速射弹的阻力特性,针对某典型结构的带圆盘空化器头部的水下射弹,设计加工了4种不同结构参数的射弹模型,在水靶道中进行了高速射弹的水下航行试验,通过试验数据处理得到了射弹的平均阻力系数,分析了空化器直径、弹体长径比、空化数对射弹阻力特性的影响,并利用Fluent6.2对其阻力系数进行数值仿真研究,在试验数据与数值仿真的基础上探索了超空泡的减阻特性,结果表明:空化器的直径越大,射弹的阻力系数越大;增加射弹的长细比,可以获得更小的阻力系数;在超空泡形态下,高速射弹的超空泡减阻率可达95%以上。

     

    Abstract: In order to investigate the drag characteristics of high speed projectile in the states of supercavitation shape, four projectile models were designed, whose structure parameters were in accordance with a typical projectile structure with disk cavitator. Experimental studies of the high speed projectiles in underwater shipping were performed and the average drag coefficients of projectiles were obtained through data processing. The influences of the cavitator diameter, the aspect ratio of projectile andcavitation number on the drag characteristics of projectile were analyzed. Finally, drag coefficients of projectiles were numerical studied with Fluent6.2. On the base of experimental data and numerical simulation, the supercavitation drag reducible characteristics were explored. The results show that the drag coefficient increases with the cavitator parameter. Smaller drag coefficient of the projectile can be obtained by increasing the slenderness ratio. The supercavitation drag reduction ratio of the high speed projectile is above 95% in supercavitation shape.

     

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