The underwater rocket ammunition is a new type of underwater weapon,which can be lunched by underwater vehicles and features a short attack distance and high projectile speed. It is demanded that the fuze could arm the rocket in a short time,so the accuracy of the start time is very important. In this paper, turbine's fluid dynamics performance was simulated and analyzed by ICEM and FLUENT,parts of ANSYS14. O.for the feasibility and stability of turbine arming institutions. The results showed that, the turbine institutions had a low start-up speed(20 m underwater,2. 97 m/s) ,and a good linearity relationship between the turbine speed and the projectile velocity. In 0~ 50 m underwater depths,the generated error was no more than 2. i%.%水下火箭弹是一种应用于小型水下航行器等的新型水中武器,具有作战距离短、威力大的特点.根据其使用环境,要求保险机构能在到达指定距离后短时间内完成解除保险,所以解除保险信号的准确性非常重要,但未见相关研究发表.针对水下涡轮机构用于引信解除保险的可行性和稳定性,运用ANSYS14.0中的ICEM和FLUENT模块,对该机构流体动力学性能进行了仿真分析.结果表明:水下火箭弹涡轮定距解除保险机构中,涡轮启动速度小(水深20 m时约2.97 m/s),涡轮转速和弹速之间线性度良好,在水深0～50 m、弹速0～100 m/s内,由水深产生的误差不大于2.4％.分析表明:该研究方法可信度较高,涡轮应用在火箭弹定距中可行,且精度较高.
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