Evaluation of wall-interference correction method using numerical analysis and porous wall model
Evaluation of wall-interference correction method using numerical analysis and porous wall model
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DOI：
10.2514/1.c032675
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发表时间：
2015-02
影响因子：
2.2
通讯作者：
T. Nambu;A. Hashimoto;M. Ueno;K. Murakami;Tetsuya Sato
中科院分区：
文献类型：
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作者：
T. Nambu;A. Hashimoto;M. Ueno;K. Murakami;Tetsuya Sato
利用计算流体力学和多孔壁模型计算的风洞二维翼型绕流，对传统的线性壁面干扰修正方法进行了评价。首先，通过与风洞试验测量值的比较，验证了计算结果。然后，利用这些结果讨论了壁面干扰效应。多孔壁对于减少堵塞是有效的，这改变了翼型周围的马赫数。然而，高的壁面孔隙率引起大的下洗，这改变了流动角。本文利用计算流体力学对线性洞壁干扰修正方法之一的Mokry方法进行了定量评价。用Mokry方法对有壁风洞的计算结果进行了修正，并与无壁风洞的计算结果进行了比较。Mokry方法在亚音速和无失速条件下具有较高的精度，满足小扰动位势方程的要求。
Evaluation of the conventional linear wall-interference correction method is conducted using flows around a two-dimensional airfoil in a wind tunnel computed by computational fluid dynamics and a porous wall model. First, the computational results are validated by comparison with wind-tunnel test measurements. Then, the wall-interference effect is discussed using these results. Porous walls are effective for reducing blockage, which change the Mach number around the airfoil. However, high wall porosity causes large downwash, which changes the flow angle. In this paper, Mokry’s method, which is one of the linear wall-interference correction methods, is evaluated quantitatively using computational fluid dynamics. Computational result with wind-tunnel walls are corrected by Mokry’s method, and the corrected result is compared with the one without wind-tunnel walls. Mokry’s method shows high accuracy in subsonic and no-stall conditions, which satisfy the requirement of the small-perturbation potential equatio...