基于改进体积力法的导管螺旋桨水动力性能数值研究

Numerical study on hydrodynamic performance of ducted propeller based on improved body force model

    摘要
  • 摘要:
      目的  旨在解决传统Goldstein体积力法在导管螺旋桨水动力仿真中的适用局限性问题。
      方法  首先，基于机翼理论，分析导管水动力模拟失真的原因，并以质量流量和体积力分布模型为切入点，提出修正思想和方法；然后，采用RANS方法探究经质量流量修正后的2种体积力分布模型的模拟精度。
      结果  结果显示，2种改进体积力法在敞水工况下其总推力系数的平均相对误差均为5%左右；在艇后工况下，前进合力的平均相对误差分别为1.8%和11.6%。
      结论  研究表明，基于改进体积力法的导管螺旋桨在敞水和艇后工况下的模拟精度较传统体积力法有较大的提升，能准确实现对导管螺旋桨水动力性能的数值模拟，可为水下航行器高效、动态的操纵性仿真奠定基础。

     

    Abstract:
      Objectives  The paper aims to solves the limitations of the Goldstein body force method in a hydrodynamic simulation of a ducted propeller.
      Methods  An analysis of the reason for the distortion of the duct hydrodynamic simulation is carried out based on the wing theory, and a correction method based on the mass flow and body force distribution model is proposed. The RANS method is then used to study the simulation accuracy of two kinds of improved body force method.
      Results  The results show that the average relative error of the total thrust coefficient of the two improved body force methods under open water conditions is about 5%. The average relative error of the resultant forward force of the two improved volume force methods behind the underwater vehicle are 1.8% and 11.6% respectively.
      Conclusions  The simulation accuracy of a ducted propeller based on the improved body force method in open water and behind an underwater vehicle is greatly improved compared with the traditional method. The proposed method can accurately simulate the hydrodynamic performance of a ducted propeller, laying the foundation for the efficient dynamic maneuverability simulation of underwater vehicles.

     

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