基于VOF多相流模型，利用重叠网格技术实现高速航行体并联出水过程运动与流场的耦合求解，对不同并联间距下双航行体高速出水的多相流动特性进行数值模拟研究。对比单独出水和并联出水过程的超空泡演化特性，获得了航行体并联出水的无量纲纵向位移变化曲线、纵向速度衰减曲线、偏航角变化曲线。研究结果表明：并联高速出水过程中，航行体周围流场彼此发生干扰，抑制了超空泡内侧的扩展，而且当并联间距较小时，2个出水超空泡的尾部发生融合。相比单个航行体出水，并联出水过程中纵向速度衰减较快，使航行体的减阻性能小幅下降。并联出水航行体的弹道发生偏转，当并联间距较小时，航行体先发生向外侧偏转之后转向内侧偏转，当并联间距较大时，航行体只发生向外侧的偏转。
Based on volume of fluid （VOF） multiphase flow model, the coupling solution of motion and flow field of the water-exit process of high-speed vehicles in parallel was realized by using overset grid technology. The multiphase flow characteristics of water-exit of two high-speed vehicles in parallel with different parallel distances were numerically simulated. The evolution characteristics of supercavitation in the water-exit process of the single vehicle and two vehicles in parallel were compared. The dimensionless longitudinal displacement variation curve, longitudinal velocity attenuation curve and yaw angle variation curve of parallel water-exit were obtained. The results show that in the process of parallel high-speed water-exit, the flow fields around the vehicle interfere with each other and inhibit the expansion of the inner side of the supercavity. Moreover, when the parallel distance is small, the tails of the two supercavities merge. Compared with the single vehicle water-exit, the longitudinal velocity decays faster in the process of parallel water-exit, which makes the drag reduction performance of the vehicle decrease slightly. The trajectory of vehicles exiting water in parallel deflects. When the parallel distance is small, the vehicles first deflect outward and then turn inward. When the parallel distance is large, the vehicles only deflect outward.
2023,45(4): 74-79 收稿日期：2021-09-16
DOI：10.3404/j.issn.1672-7649.2023.04.015
分类号：O352
基金项目：浙江省自然科学基金资助项目（LY16A020003）；浙江省教育厅科研资助项目（Y202146461;Y202146575）
作者简介：周东辉(1989-),男,博士,讲师,研究方向为超空泡减阻技术
