新型无尾翼水下滑翔器升阻比性能的研究

Research on a New Type of Tailless Underwater Glider

采用标准k-ε两方程涡粘性模型,压力的隐式算子分割算法（PISO）求解时均Reynolds方程（RANS）,对三种新型无尾翼水下滑翔器的升阻比性能进行研究。先对滑翔器摩擦阻力的CFD模拟结果与理论计算结果进行对比分析,验证CFD模拟结果的合理性与可靠性;再对不同迎流速度、不同速度攻角下的试验工况进行数值模拟,分析不同试验工况下滑翔器的粘压阻力与升力,得到不同试验工况下滑翔器的升阻比性能。研究结果表明,新型无尾翼水下滑翔器在5°~15°攻角区间内具有良好的升阻比,小攻角下圆碟型和飞碟型滑翔器的升阻比性能优于椭圆型滑翔器,而大攻角下椭圆型滑翔器相对其它两种具有更佳的升阻比性能,为新型无尾翼水下滑翔器升阻比性能的研究提供一定的思路。

This paper uses the standard κ-ε two equation eddy viscosity model and the pressure implicit with splitting of operators（PISO） algorithm to solve the Reynolds-Averaged Navier-Stokes（RANS） equation for studying three new types of tailless underwater gliders in their lift-drag ratio performances. The CFD simulation results are compared with the results of theoretical calculation of the friction of the glider for verifying the rationality and reliability of the CFD simulation results. Then numerical simulation is conducted for the experimental states under different approach speeds and different speeds of attack angle, in order to analyze the viscous-pressure resistance and elevating force, obtaining the lift-drag ratio performances of gliders under different experimental states. The research results show that the new type of tailless underwater glider has a good performance in lift-drag ratio between the 5 to 15 degree attack angle. It is showed that the lift-drag ratio of the Roundel or Disk glider is higher than that of Ellipse glider under small attack angle, while the Ellipse glider has a higher lift-drag ratio than others under large attack angle. The study results provide some ideas for the research of new-type tailless underwater gliders.