| 基于非结构变形网格的间断装配法原理 |
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| 作者姓名： | 刘君 邹东阳 董海波 |
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| 作者单位： | 大连理工大学 工业装备结构分析国家重点实验室, 辽宁大连 116024 |
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| 基金项目： | 国家自然科学基金9154117 |
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| 摘 要： | 在激波捕捉法计算得到的流场基础上采用辨识算法得到初始间断位置, 从ALE方程出发, 考虑离散几何守恒律, 采用变形网格和网格重构技术解决计算过程中间断运动和变形, 新旧网格之间流场采用高精度信息传递方法保持时间精度, 建立了基于非结构动网格技术的间断装配方法.通过激波管问题的二维模拟, 模拟了初始间断分解为激波和接触间断激波遇到固壁反射后与接触间断相交的非定常流动过程, 对这种新方法的基本原理进行了介绍.
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| 关 键 词： | 激波 装配法 非结构动网格 超声速流动 |
| 收稿时间： | 2016-10-05 |
Principle of New Discontinuity Fitting Technique Based on Unstructured Moving Grid |
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| Affiliation: | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | A new discontinuity fitting technique based on unstructured moving grid was proposed in this paper, which contained these processes: (1) locating the initial position of discontinuities on the basis of computed flow-field by capturing algorithm; (2) dealing with the motions and deformations of fitted discontinuities using moving grid approach and remesh technique in the context of arbitrary Lagrange-Euler (ALE) formulation, at the same time ensuring to satisfy discrete geometric conservation law (DGCL); (3) ensuring the time accuracy in the process of interpolating among meshes by a high accurate transferring flow information method. A Sod problem was chosen to introduce the principle of new discontinuity fitting technique. |
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