摘要
超空泡航行体的外形设计关乎其尾拍运动特性。为获得航行体的锥段结构对其尾拍运动特性的影响规律,采用动网格技术结合流体体积多相流模型、SST k-ω湍流模型和Schnerr-Sauer空化模型,对4种不同锥段结构的航行体尾拍运动特性开展数值模拟研究,分析超空泡航行体的尾拍运动过程及弹道特性。研究结果表明:在一定俯仰角速度扰动下,航行体锥段结构变化对其尾拍稳定性的影响体现出非线性特点,锥段部分过长或过短均会导致航行体的肩部沾湿而形成二次空泡,二次空泡的发展会抑制航行体尾部沾湿,从而回转力矩无法促使俯仰角减小,导致尾拍运动失稳,弹道稳定性较差。该研究成果可为超空泡航行体外形设计提供一定的理论指导。
The shape design of the supercavitating vehicle is related to its tail-slap motion characteristics.In order to obtain the influence of the cone part of supercavitating vehicle on its tail-slap motion,the dynamic grid technology combined with the VOF multiphase flow model,SST k-ωturbulence model and Schnerr-Sauer cavitation model are applied to simulate the tail-slap motion of supercavitating vehicle with the four different cone parts.The tail-slap motion and trajectory characteristics of supercavitating vehicle are analyzed.The results show that the influence of the cone geometry on the tail-slap stability of supercavitating vehicle is nonlinear under the condition of a certain pitch angle speed.If the cone section is too long or too short,the shoulder of supercavitating vehicle will get wet and form secondary cavitation.The development of secondary cavitation can inhibit the tail wet,which causes the turning moment failing to reduce the pitching angle and then the tail-slap motion and the trajectory showing instability.
作者
张亮
胡常莉
吴小安
ZHANG Liang;HU Changli;WU Xiao an(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第3期828-836,共9页
Acta Armamentarii
关键词
超空泡航行体
锥段结构
尾拍运动
6自由度
supercavitating vehicle
cone geometry
tail-slap
6 degrees of freedom
