CAJ | 학술논문

　　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 FLUENT 6.3,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50~150 m/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。
　　회전체입수문제대도탄、어뢰등적외형화탄도설계유착심원영향。본문이용상업연건 FLUENT 6.3,결합동망격기술화용호자정의함수(UDF),사용혼합물(MIXTURE)모형대평두、추두화원두회전체재속도위50~150 m/s 시적입수과정진행료방진시험,탐구속도화두형대기입수충격재하화공포형태적영향。시험결과표명,회전체고속입수충격재하봉치발생재입수초기,차속도증대시,회전체충격재하、공포직경화장도역수지증대,재속도상동적정황하,회전체충격재하、공포직경화장도안평두、추두、원두적차서의차감소。
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.