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李鹏, 王超, 韩阳, 郐云飞, 王世民. 自由液面对艇后螺旋桨性能的影响研究. 力学学报, 2021, 53(9): 2501-2514. DOI: 10.6052/0459-1879-21-063
引用本文: 李鹏, 王超, 韩阳, 郐云飞, 王世民. 自由液面对艇后螺旋桨性能的影响研究. 力学学报, 2021, 53(9): 2501-2514. DOI: 10.6052/0459-1879-21-063
Li Peng, Wang Chao, Han Yang, Kuai Yunfei, Wang Shimin. The study about the impact of the free-surface on the performance of the propeller attached at the stern of a submarine. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(9): 2501-2514. DOI: 10.6052/0459-1879-21-063
Citation: Li Peng, Wang Chao, Han Yang, Kuai Yunfei, Wang Shimin. The study about the impact of the free-surface on the performance of the propeller attached at the stern of a submarine. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(9): 2501-2514. DOI: 10.6052/0459-1879-21-063

自由液面对艇后螺旋桨性能的影响研究

THE STUDY ABOUT THE IMPACT OF THE FREE-SURFACE ON THE PERFORMANCE OF THE PROPELLER ATTACHED AT THE STERN OF A SUBMARINE

  • 摘要: 靠近自由液面航行的潜艇, 自身绕流特性较其在深水区域会有所改变, 从而影响艇后螺旋桨的性能表现, 进而增加潜艇安全航行的风险. 为了探究自由液面存在对艇后螺旋桨性能的影响, 本文利用URANS方程耦合 k - \omega 湍流模型, 基于Star CCM+求解器对潜艇自航模(Sub-off+E1619桨)在近自由液面航行时的性能进行数值仿真计算. 首先, 通过对比可获取的实验数据, 数据包括无限潜深下全附体艇体阻力实验数据、多潜深条件下旋转体阻力实验数据和螺旋桨敞水实验数据, 验证数值模拟方法的正确性; 接着, 基于3套不同密度的网格开展网格收敛性分析, 确保数值模拟的准确性; 最后, 对2个潜深、3个航速下潜艇自航模的性能进行仿真计算, 分析自由液面对自航模螺旋桨性能的影响. 结果表明, 自由液面的存在首先会增加潜艇自航模自航点对应的螺旋桨转速; 另外, 自由液面的兴波和艇体壁面形成的类喷嘴流动与转速变化有关, 类喷嘴流动和桨的抽吸作用共同改变桨叶剖面的迎流攻角, 使得桨叶靠近或远离自由液面会显著改变螺旋桨的载荷.

     

    Abstract: The performance of the propeller attached at the stern of the submarine navigating under limited depths is affected obviously by the free-surface, duo to the changes of the flow field characteristics around this vehicle. And what mentioned above will greatly threaten the security of the maneuverability of the submarine. To figure out the effect of the free-surface on the performance of the propeller attached at the stern of the submarine. In this paper, the URANS (unsteady Reynold average Navier−Stokes) equations coupled with k - \omega turbulence model are used for the numerical simulations about performance of the self-propulsion model (the standard Sub-off geometry and the E1619 propeller). At first, the experimental data available including the resistance tests of the submarine with all appendages under total submergence, the resistance tests of the revolution with different navigating depths and the OWC (open water curve) of the propeller, is used for the validation of the numerical method adopted in this paper. Next, the correctness of the numerical method is acquired based on three sets of grids with different spatial resolutions. Finally, the performance of the self-propulsion model navigating under two depths and three different velocities is simulated carefully to figure out the effect of the free-surface on the performance of the self-model. The numerical results show that the exitance of the free surface increases the rotational speed of the propeller at a specific navigating speed, which corresponds to the self-propulsion point. The increment mentioned above is related to the wave pattern induced by the submarine. The wave pattern will cause the nozzle-like flow between submarine and free-surface. The nozzle-like flow and the suction of the propeller change the angle of attack of the blade profile at different radial sections. Meanwhile, approaching and getting away from free surface will also significantly change the hydrodynamic loads of the propeller.

     

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