Wave reflections from duct terminations.
Wave reflections from duct terminations.
复制标题
管道终端的波反射。
DOI：
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发表时间：
2001
影响因子：
2.4
通讯作者：
R. A. Kach
中科院分区：
文献类型：
--
作者：
A. Selamet;Z. Ji;R. A. Kach
几个管道终端，包括有限长度的管道延伸垂直于一个无限的墙壁，以及在一些角度，弯曲的界面，和环形腔的反射系数和惯性端修正，确定和分析的情况下，通过采用边界元法的流动。经典的无凸缘和凸缘圆形管道的预测显示出良好的协议与文献中的分析和计算结果。弯曲的界面表面（喇叭口或喇叭）的预测也与现有的实验数据一致。考虑到其高反射系数，可以建议具有环形腔的管道终端用于抑制特定频带中的噪声辐射或用于终端的有效波反射。
The reflection coefficients and inertial end corrections of several duct terminations, including finite length duct extensions perpendicular to an infinite wall, as well as at a number of angles, curved interface surfaces, and annular cavities, are determined and analyzed in the absence of flow by employing the boundary element method. Predictions for the classical unflanged and flanged circular ducts show good agreement with analytical and computational results available in the literature. The predictions for curved interface surfaces (bellmouth or horn) are also consistent with the available experimental data. In view of its high reflection coefficient, the duct termination with an annular cavity may be suggested for the suppression of noise radiation in a specific frequency band or for an effective wave reflection from the termination.