摘要
数字模拟被调查揭示推进器老板帽子鳍(PBCF ) 怎么操作利用平均 Reynolds 的海军司烧(RANS ) 方法。另外，一个可操纵螺距推进器的开的水效率上的 PBCF 的影响机制的探索通过开的水特征曲线，片表面压力分发和中心被分析优化分发。在这个基础上，包括机翼侧面，直径，安装的轴的位置和可操纵螺距推进器的开的水效率上的环绕的安装角度的参数的影响被调查。数字结果出现：为可操纵螺距推进器，当老板帽子鳍的半径是 1.5 次有在轴的方向的一个最佳的安装位置的推进器中心时，产生的戳在最佳，并且它的最佳的环绕的安装位置是前面的延期线和在鳍根的前面的二条邻近的推进器根的后端的中点。在这些最佳的参数下面，有不同进展速度系数的可操纵螺距推进器的开的水效率的获得比 0.01 大，它近似说明开的水效率的 1%5% 的增加。
Numerical simulation is investigated to disclose how propeller boss cap fins （PBCF） operate utilizing Reynolds-averaged Navier-Stokes （RANS） method. In addition, exploration of the influencing mechanism of PBCF on the open water efficiency of one controllable-pitch propeller is analyzed through the open water characteristic curves, blade surface pressure distribution and hub streamline distribution. On this basis, the influence of parameters including airfoil profile, diameter, axial position of installation and circumferential installation angle on the open water efficiency of the controllable-pitch propeller is investigated. Numerical results show： for the controllable-pitch propeller, the thrust generated is at the optimum when the radius of boss cap fins is 1.5 times of propeller hub with an optimal installation position in the axial direction, and its optimal circumferential installation position is the midpoint of the extension line of the front and back ends of two adjacent propeller roots in the front of fin root. Under these optimal parameters, the gain of open water efficiency of the controllable-pitch propeller with different advance velocity coefficients is greater than 0.01, which accounts for approximately an increase of 1%-5% of open water efficiency.
基金
Supported by the National Natural Science Foundation of China under Grant No.51079157
