摘要
回转体入水问题对导弹、鱼雷等的外形和弹道设计有着深远影响。本文利用商业软件FLUENT6．3，结合动网格技术和用户自定义函数（UDF），使用混合物（MIXTURE）模型对平头、锥头和圆头回转体在速度为50～150m／s时的入水过程进行了仿真试验，探究速度和头型对其入水冲击载荷和空泡形态的影响。试验结果表明，回转体高速入水冲击载荷峰值发生在入水初期，且速度增大时，回转体冲击载荷、空泡直径和长度亦随之增大，在速度相同的情况下，回转体冲击载荷、空泡直径和长度按平头、锥头、圆头的次序依次减小。
The problem of high-speed water entry of an axisymmetric body greatly influences the design of shape and trajectory for a torpedo or a missile. This paper simulates the impact and cavity shape in water entry of different head shapes, such as flat head, cone head, and round head, at the velocity between 50 -150 m/s with the commercial software FLUENT6.3 combining with the dynamic mesh, user-define function（UDF） and MIXTURE model. Conclusions are drawn that the peak of impact load appears in the primary period of the water entry; the impact load and the cavity＇s length and diameter increase with the increasing velocity; while the impact load and the cavity＇s length and diameter decrease in the order of flat head, cone head, and round head when the bodies have same velocity.
出处
《鱼雷技术》
2013年第3期161-164,共4页
Torpedo Technology
关键词
回转体
入水冲击
空泡形态
混合物模型
冲击载荷
axisymmetric body
water entry impact
cavity shape
MIXTURE model
impact load
