Numerical Simulation of Two-Dimensional Large-Amplitude Acoustic Oscillations

Numerical Simulation of Two-Dimensional Large-Amplitude Acoustic Oscillations
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二维大振幅声振荡的数值模拟

DOI:
10.18280/ijht.340121
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发表时间:
2016-03
影响因子:
0.9
通讯作者:
Fenglin Yin
Fenglin Yin
中科院分区:
--
文献类型:
--
作者:
Heying Feng;Yehui Peng;Jianshi Gong;Fenglin Yin

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用气体动力学方法模拟了四种不同驱动振幅下谐振腔中的二维非线性声振荡。根据仿真结果,分析了谐振腔中的激波、激励振幅对声场和流场的影响以及谐波的分布。此外,本文还讨论了环形效应和速度反转等非线性效应产生的原因。指出随着激励幅值的增大,声学变量波形的畸变程度增大。结果表明,大振幅下的声场和流场与有限振幅下的声场和流场有很大的不同。激波对压力、温度和轴向速度的影响很大,而对径向速度的影响不大。这些都表明大振幅对谐振腔的非线性有很大的影响。
The two-dimensional nonlinear acoustic oscillations in the resonator of four different driving amplitudes are simulated by a gas-kinetic scheme. The shock in the resonator, the effects of the driving amplitude on the acoustic field and flow and the distribution of harmonics are investigated based on the simulaton results. Moreover, this work discusses the reasons for the nonlinear effects such as annular effect and velocity reverse. It is pointed out that the waveforms of the acoustics variables increasingly distort with the driving-amplitude increasing. And it is found that the acoustic field and the flow under the large-amplitude are quite different from those under the finite-amplitude. Moreover, it has been shown that the shock greatly affects the pressure, temperature and the axial velocity and has no effect on the radial velocity. All of this shows that the largeamplitude has a large effect on the nonlinearity in the resonator.
DOI: 10.1121/1.1366318
发表时间: 2001-06
期刊: The Journal of the Acoustical Society of America
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