Propagation of weak pressure waves against two parallel subsonic streams
Propagation of weak pressure waves against two parallel subsonic streams
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DOI：
10.1007/s11630-006-0135-2
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发表时间：
2006-06
影响因子：
2.5
通讯作者：
Makiko Yonamine;Takanori Ushijima;Y. Miyazato;M. Masuda;H. Katanoda;K. Matsuo
中科院分区：
文献类型：
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作者：
Makiko Yonamine;Takanori Ushijima;Y. Miyazato;M. Masuda;H. Katanoda;K. Matsuo
本文通过一维分析、二维数值模拟和实验研究了等截面直管道中压力波对两平行亚音速来流的传播特性。计算采用二维Euler方程，采用Chakravarty-Osher型TVD格式。通过纹影法的光学观测和壁面压力测量，阐明了压力波的结构和传播速度。结果表明，逆着来流传播的压力波变为分叉压力波，分叉发生在低速来流中。通过分析计算得到的压力波传播速度与实验数据吻合较好。
In this paper, the characteristics of a pressure wave propagating against two parallel subsonic streams in a constant-area straight duct are investigated by one-dimensional analysis, two-dimensional numerical simulation, and experiments. Computations have been carried out by the two-dimensional Euler Equations using the Chakravarthy-Osher-type TVD scheme. Optical observations by the schlieren method as well as wall pressure measurements have been performed to clarify both the structure and the propagation velocity of pressure waves. The results show that the pressure wave propagating against the streams changes into a bifurcated pressure wave and the bifurcation occurs in the low speed streams. It is also found that the propagation velocity of the pressure wave obtained by the analysis and computation agrees well with the present experimental data.