潜伏式高速船型变航态自航数值模拟
发布时间：2018-11-20 15:25
【摘要】：针对一种具有半潜—水面航态变换功能的新型潜伏式高速船型,基于非稳态RANS方程组与VOF模型求解粘性流场,结合动态流域边界与滑移网格技术,对目标船在垂直面内三自由度运动及其喷水推进器叶轮随船定轴高速旋转的耦合运动进行数值模拟。结果表明,在相同主机平均转速条件下,所预报自航点体积傅氏数与自航模型试验结果的相对误差在7%以内;从半潜到水面的航态变换过程中,船体有显著的纵倾与升沉,船体主要克服压差阻力,船体兴波由相互叠加的首波、肩波、尾波逐渐发展为首尾分明的两个波系,在喷水推进器射流区内捕捉到生成和发展的高强度涡系。
[Abstract]:Aiming at a new type of latent high-speed ship with the function of semi-submersive-surface navigation state transformation, the viscous flow field is solved based on the unsteady RANS equations and VOF model, and the dynamic basin boundary and sliding grid technology are combined to solve the viscous flow field. The coupled motion of the target ship with three degrees of freedom in the vertical plane and the impeller of the water jet propeller rotating with the ship's fixed axis at high speed is numerically simulated. The results show that the relative error between the predicted volume Fourier number and the model test results is less than 7% under the same average speed of the main engine. In the course of the change of ship's state from half to the water, the hull has significant trim and heave, and the hull mainly overcomes the pressure differential resistance, and the hull waves are gradually developed from the superimposed first wave, shoulder wave and coda wave to two distinct head-and-tail wave systems. High intensity vortices generated and developed were captured in the jet zone of the water jet propeller.
【作者单位】： 海军工程大学舰船工程系;
【分类号】：U661.7
[Abstract]:Aiming at a new type of latent high-speed ship with the function of semi-submersive-surface navigation state transformation, the viscous flow field is solved based on the unsteady RANS equations and VOF model, and the dynamic basin boundary and sliding grid technology are combined to solve the viscous flow field. The coupled motion of the target ship with three degrees of freedom in the vertical plane and the impeller of the water jet propeller rotating with the ship's fixed axis at high speed is numerically simulated. The results show that the relative error between the predicted volume Fourier number and the model test results is less than 7% under the same average speed of the main engine. In the course of the change of ship's state from half to the water, the hull has significant trim and heave, and the hull mainly overcomes the pressure differential resistance, and the hull waves are gradually developed from the superimposed first wave, shoulder wave and coda wave to two distinct head-and-tail wave systems. High intensity vortices generated and developed were captured in the jet zone of the water jet propeller.
【作者单位】： 海军工程大学舰船工程系;
【分类号】：U661.7
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