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过去在鱼雷型回转体上加尾导管的操纵性模型试验研究表明,尾导管使回转体的静稳定性显著降低,而DARPA的SUBOFF模型试验结果却显示,潜艇类回转体(主体)加尾导管(尾附件)对回转体的静稳定性没有不利的影响,而且还提高了回转体的运动稳定性。本文通过模型试验对水滴型回转体加尾导管的静稳定性以及导管的水动力特性进行了精细的研究,同时,结合CFD工具对回转体绕流进行的机理分析,得出了尾导管对主体静稳定性影响的基本结论:在有攻角的情况下,主体近表面的绕流特性主要由势伴流控制,当导管尺寸相对比较小时,尾导管的实际有效来流攻角与名义来流攻角符号相反,而产生不稳定的力矩,导致主体静稳定性反而下降。
In the past, the manipulative model test on the torpedo-type rotary body showed that the stability of the rotary body was significantly reduced by the tail pipe. However, the SUBOFF model test results of DARPA showed that the sub-type rotary body (main body) (Tail attachment) has no adverse effect on the static stability of the slewing body, but also improves the stability of the slewing body’s movement. In this paper, through the model test, the static stability of the ducted catheter and the hydrodynamic characteristics of the catheter were studied. At the same time, the mechanism of the catheter around the flow body was analyzed based on the CFD tool. The basic conclusion about the static stability effect: Under the condition of attack angle, the flow around the main body near the surface is mainly controlled by potential companion flow. When the pipe size is relatively small, the actual effective flow angle and nominal flow of the tail pipe Contrary to the angle of attack sign, and instability of the moment, leading to the main body static stability but decreased.