机构地区: 西北工业大学动力与能源学院翼型叶栅空气动力学国防科技重点实验室
出 处: 《航空计算技术》 2005年第3期29-33,共5页
摘 要: 研究了二维、三维复杂外形下的无网格算法。在一种布置点云方法的基础上,发展一种曲面拟合的重构方式构造流场物理量,并应用于AUSM+_up格式计算欧拉方程的数值通量;计算采用了隐式时间推进,并引入当地时间步长和残值光顺等加速收敛措施。通过对某三段翼型低速流动、M6机翼跨音速流动、某全机跨音速流动进行了数值模拟,表明本文发展的无网格算法能有效地模拟复杂外形的无粘绕流。 In this paper, a gfidless method for 2 -D and 3 -D complex shape flow calculation is investigated. On the base of the distributed clouds of points, a least - squares fitting and the AUSM^+ _up scheme is used to obtain the numerical flux. An implicit algorithm is used to advanced the flow equations in time, at the same time local time stepping technique and residual averaging are employed. In order to demonstrate the accuracy and rudeness of the method, some multi -element airfoil in subsonic flow, M6 wing in transonic flow, and some plane in transonic flow are computed. The compute result demonstrate that the greedless method in this paper can be good for simulation of complex shape flow.
领 域: [航空宇航科学与技术] [航空宇航科学技术]