Receptivity of hypersonic boundary layer due to fast-slow acoustics interaction
Receptivity of hypersonic boundary layer due to fast-slow acoustics interaction
复制标题
快慢声学相互作用导致的高超声速边界层的接受性
DOI：
10.1007/s10409-015-0504-8
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发表时间：
2015-09
影响因子：
3.5
通讯作者：
Wu Xue-Song
中科院分区：
文献类型：
--
作者：
Gao Jun;Luo Ji-Sheng;Wu Xue-Song
感受性的目的是研究外部扰动产生不稳定波的机制。在高超声速边界层中，快、慢声通过非线性相互作用，在第二模态的下支附近激发出第二模态，这是一种新的感受性过程。它们通过非线性相互作用产生一个和频扰动，从而激发第二阶模态。这种感受性过程是由边界层的非线性相互作用和非平行性质产生的。感受性系数对和频扰动与下支二阶模态之间的波数差敏感。当波数差为零时，接收系数最大。感受性系数随波数差的增大而减小。研究还发现，和频扰动的演化在初始阶段是线性增长的。这表明和频扰动产生的强迫项与第二阶模态发生共振。
The objective of receptivity is to investigate the mechanisms by which external disturbances generate unstable waves. In hypersonic boundary layers, a new receptivity process is revealed, which is that fast and slow acoustics through nonlinear interaction can excite the second mode near the lower-branch of the second mode. They can generate a sum-frequency disturbance though nonlinear interaction, which can excite the second mode. This receptivity process is generated by the nonlinear interaction and the nonparallel nature of the boundary layer. The receptivity coefficient is sensitive to the wavenumber difference between the sum-frequency disturbance and the lower-branch second mode. When the wavenumber difference is zero, the receptivity coefficient is maximum. The receptivity coefficient decreases with the increase of the wavenumber difference. It is also found that the evolution of the sum-frequency disturbance grows linearly in the beginning. It indicates that the forced term generated by the sum-frequency disturbance resonates with the second mode.
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影响因子：
3.7
作者：
By P. Balakumar;M. Malik
通讯作者：
By P. Balakumar;M. Malik
非线性特征值问题的模态分解及其在流动稳定性中的应用
DOI：
10.1007/s10483-014-1820-6
发表时间：
2014
期刊：
Applied Mathematics and Mechanics (English Edition )
影响因子：
--
作者：
Gao Jun;Luo Ji-sheng
通讯作者：
Luo Ji-sheng
影响因子：
3.7
作者：
By M. E. Goldstein
通讯作者：
By M. E. Goldstein
DOI：
10.1098/rspa.1987.0119
发表时间：
1987-10
期刊：
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
影响因子：
--
作者：
J. Luo;H. Zhou
通讯作者：
J. Luo;H. Zhou
影响因子：
3.7
作者：
Ma, YB;Zhong, XL
通讯作者：
Zhong, XL