摘要
面元法已经在导管螺旋桨的水动力性能计算中得到愈来愈多的应用。网格划分和影响系数计算是其核心问题。本文采用了不同的网格划分函数生成直网格和螺旋网格 ,影响系数分别采用全部对应于四边形双曲面元的精确公式、全部高斯积分近似计算公式以及近场采用精确公式、远场采用高斯积分近似计算三种方法 。
The surface panel method has been widely and successfully applied for the prediction of hydrodynamic performance of ducted propellers.The grid generation and computation of influence coefficients of duct panels are key problems for the accuracy of the calculated results.The chordwise pressure distribution on the duct surface and induced velocity field due to singularity distribution representing the duct are calculated by using different panel arrangement with helical paneling with varying pitch angles,number of panels and methods to calculate the influence coefficients.Potential based surface panel method is used for the duct influence coefficient calculation.When influence coefficients are computed,three different treatments are adopted: 1. Exact formulas of quadrilateral hyperboloidal panels for the near field and approximate formulas obtained by Guass quadrature technique for the far field; 2. Exact formulas for the whole field; 3. Gauss integral approximate formulas with different number of Gauss points for the whole field.Detailed analysis and comparison are made in this paper.
出处
《船舶力学》
EI
2000年第5期1-8,共8页
Journal of Ship Mechanics
