水下航行器海流发电装置叶轮的数值仿真

针对水下航行器航行过程中的能源补给问题，设计了一种用于水下航行器的垂直轴海流发电装置.为探索稳定海流中发电装置叶轮的受力特性和功率输出特性，利用滑移网格技术对叶轮流场进行了二维非定常数值仿真，结果与实验数据较为吻合.针对4叶片和3叶片叶轮分析了叶轮旋转速度ω和叶片翻转角θ对叶轮发电性能的影响，结果表明，3叶片叶轮最大输出功率要高于4叶片叶轮，展长为1 m的3叶片叶轮在v∞=1 m/s、θ=120°和ω=0.3 rad/s时获得最大平均输出功率29.33 W.分析了3叶片叶轮在来流v∞=1 m/s下速度场的基本特点，为实际的设计安装工作提供了预测和指导.

Numerical Analysis of a Water Turbine for Underwater Vehicles

In this paper, a vertical axis water turbine (VAWT) was developed to supply energy for underwater vehicles. 2-D transient numerical studies were conducted to determine the operating performance and power output of the turbine. A RNG k-ε turbulence model was used to perform the transient simulations. For both the four-bladed turbine and three-bladed turbine, the influence of blade pitch angle on the turbine performance was investigated over a range of rotor rotation velocity ω. It was found that the three-bladed turbine showed a larger power output than the four-bladed turbine. For a three-bladed turbine, a maximum averaged power of 29.33 W was generated when v=1 m/s, θ=120° and ω=0.3 rad/s. Contours of the velocity field of a three-bladed turbine under an inflow velocity of 1 m/s were also analyzed, providing helpful reference for the future design of turbines.