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给出了二维轴对称欧拉方程的自适应网格隐式矢通量分裂差分格式和模拟结果。隐式矢通量分裂格式不需人工粘性项与人工耗散项,可以计算跨声速流场,也可以较准确地捕获激波。利用流场解的梯度信息对网格进行调整,可以提高激波的捕获精度。算例表明:该方法精度高、稳定性好、不依赖于初始条件。
An adaptive grid implicit vector flux difference scheme and simulation results for two-dimensional axisymmetric Euler equations are given. Implicit vector flux splitting format does not need artificial viscous items and artificial dissipation items, can calculate transonic flow field, and can capture shock more accurately. Using the gradient information of the flow field solution to adjust the grid, the shock capture accuracy can be improved. The example shows that this method has high precision and good stability, and does not depend on the initial conditions.