Numerical Simulation of Leading-Edge Vortex Breakdown Using an Euler Code
Numerical Simulation of Leading-Edge Vortex Breakdown Using an Euler Code
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DOI：
10.2514/3.46161
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发表时间：
1989-07
影响因子：
2.2
通讯作者：
P. O'neil;R. Barnett;C. M. Louie
中科院分区：
文献类型：
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作者：
P. O'neil;R. Barnett;C. M. Louie
利用欧拉代码对三角翼尖锐前缘产生的前缘涡击穿进行了可靠的模拟。描述了一种直接的技术，可以在数值解中识别涡击穿的开始，从而允许与实验数据进行定量比较。随着攻角的变化，预测的击穿过程与测试数据一致，直到CLmax，并表明旋涡击穿过程主要由粘度因素控制。计算网格特性和翼廓效应对击穿预测的影响也被注意到。
Reliable simulation of the breakdown of leading-edge vortices emanating from sharp leading edges of delta wings is demonstrated using an Euler code. A straightforward technique is described that identifies the onset of vortex breakdown within numerical solutions, thereby allowing quantitative comparison with experimental data. Predictions of breakdown progression with angle of attack are shown to be consistent with test data up to CLmax, and indicate that the vortex breakdown process is governed primarily by in viscid factors. Effects of computational grid characteristics and wing camber effects on breakdown prediction are also noted.