Stream function–potential function coordinates for aeroacoustics and unsteady aerodynamics
Stream function–potential function coordinates for aeroacoustics and unsteady aerodynamics
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DOI：
10.1080/10618560902798079
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发表时间：
2009-03
影响因子：
1.3
通讯作者：
H. Gopalan;A. Povitsky
中科院分区：
文献类型：
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作者：
H. Gopalan;A. Povitsky
与紧凑的高阶有限差分格式相结合的“流函数作为坐标方法”（SFC）已被开发出来并应用于空气声学和非定常空气动力学问题。 SFC 的直接实现会在驻点附近创建粗糙网格，从而影响高阶数值计算。采用网格聚类来解决驻点附近的粗网格。扑动翼型的数值结果与粒子图像测速 (PIV) 测量之间的一致性表明了当前执行高阶计算的方法的鲁棒性。
‘Stream function as a coordinate approach’ (SFC) combined with compact high-order finite difference schemes has been developed and applied to aeroacoustics and unsteady aerodynamics problems. Straightforward implementation of SFC creates coarse grids at the vicinity of stagnation points that smears high-order numerical computations. Grid clustering is employed to resolve coarse grid near stagnations points. The agreement between numerical results and particle image velocimetry (PIV) measurements for flapping airfoil shows the robustness of the current approach for performing high-order computations.