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CFD中数值耗散和延伸边界对声传播的影响 被引量：4

Effect of numerical dissipation and extended-grid on sound propagation in computational fluid dynamics
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摘要 对已知色散关系的正弦波在二维管道中的传播使用有限体积法进行计算,结果表明二阶精度下每波长40个左右的网格点能够有效地保留声波.在计算域外增加稀疏网格延伸段能够对边界反射起到抑制作用,为以较小的计算量增加实现较好的反射抑制效果,研究给出了延伸段长度和网格轴向尺寸的推荐公式. A sinusoidal acoustic wave with known dispersion-relation was propagated through a two-dimensional duct using a finite-volume scheme,showing that a rough estimate of around 40 points per wavelength under second order accuracy was sufficient to preserve the wave.Adding an extended coarse grid out of the computational region could reduce the unwanted boundary reflection.A guideline of the extended-grid＇s length and axial size for the good effect of absorbing the boundary reflection with less computation was provided.
作者 赵磊 乔渭阳
机构地区 西北工业大学动力与能源学院
出处 《航空动力学报》 EI CAS CSCD 北大核心 2010年第12期2716-2720,共5页 Journal of Aerospace Power
关键词 叶轮机噪声 数值耗散 边界反射 延伸网格 计算流体动力学 turbomachinery noise numerical dissipation boundary reflection extended-grid computational fluid dynamics（CFD）
分类号 V235.13 [航空宇航科学与技术—航空宇航推进理论与工程]
  • 相关文献

参考文献11

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共引文献14

同被引文献27

  • 1陈海生,谭春青,Yamamoto Atsumasa,梁锡智.低展弦比涡轮静叶栅叶片正弯曲作用的试验研究[J].机械工程学报,2005,41(2):65-70. 被引量：6
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引证文献4

二级引证文献20

航空动力学报
2010年 第12期

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