螺旋桨非定常性能的面元法预报

采用扰动速度势面元法预报螺旋桨非定常性能,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.预报结果与测试结果或其它数值结果比较是令人满意的.

Prediction of Unsteady Performance of Propeller by Surface Panel Method

The prediction of unsteadyflow around a propeller by utilizing the perturbation potential based surface panel method is studied. The propeller blades, hub and their trailing vortex surface are divided into a number of small hyperboloidal quadrilateral panels. The solution of unsteady problem in the time domain is analyzed by using a time-marching iterative method, a non-linear iterative procedure is set to ensure the Kutta condition of equal pressure at the blade trailing edge. The algorithm presented in the paper is shown to be more efficient, quick and robust. The numerical results are in satisfactory agreement with experimental data and other numerical result.