螺旋桨非定常轴承力计算

Calculation of unsteady shaft forces of propeller

采用扰动速度势面元法计算螺旋桨非定常轴承力,桨叶、桨毂和尾涡面由双曲四边形面元进行离散,对时域内非定常问题的求解采用时间步进迭代方法,建立了满足桨叶随边非定常等压库塔条件的非线性迭代结构,使迭代求解更加有效、快速和稳定。

This paper calculated the unsteady shaft forces of propellers by utilizing the perturbation potential based on the panel method. The propeller blades, hub and their trailing vortex surface are meshed by a number of small hyperbolical quadrilateral panels. The unsteady problem in the time domain is calculated by using a time-marching iterative method, a nonlinear itemtive procedure is set to ensure the Kutta condition of equal pressure at the blade trailing edge. The proposed algorithm is shown to be more efficient, quick and robust. The numerical results are in satisfactory agreement with experimental data and other numerical results.