Finite Element Analysis of the Standing Wave Field in a Tube with Lossy Wall for Thermoacoustic System
Finite Element Analysis of the Standing Wave Field in a Tube with Lossy Wall for Thermoacoustic System
复制标题
热声系统有损壁管内驻波场的有限元分析
DOI：
10.1143/jjap.50.07he21
复制
发表时间：
2011
影响因子：
1.5
通讯作者：
S. Sakamoto
中科院分区：
文献类型：
--
作者：
M. Nishikori;T. Tsuchiya;S. Sakamoto
将有限元方法应用于热声管内稳态声场的频域分析。虽然热声场是非线性的、等温的，但我们提出了一个线性绝热模型，其中只考虑了声强场，因为在热声系统中，为了提高能量转换效率，一般都是讨论声强。在数值模型中，声强的发散被模拟为声源，耗散被模拟为由墙体的特定声阻抗引起的损失。对有耗直管中的二维驻波场进行了数值计算。研究了叠加和相位调节器对声场的影响。通过引入壁面的特定声阻抗，可以对热声管内的声场进行定性分析。
The finite element method (FEM) is applied to the analysis of the steady-state sound field in a thermoacoustic tube in the frequency domain. Although the thermoacoustic field is nonlinear and isothermal, a linear and adiabatic model is proposed, in which only the sound intensity field is considered because the sound intensity is generally discussed for the efficiency of energy conversion in the thermoacoustic system. In the numerical model, the divergence of the sound intensity is modeled as the sound source and the dissipation is modeled as loss caused by the specific acoustic impedance of the wall. Some numerical demonstrations are made for the two-dimensional standing wave field in a straight tube with a lossy wall. The influences of the stack and the phase adjuster on the sound field are examined. It is found that the sound field in the thermoacoustic tube can be qualitatively analyzed by introducing the specific acoustic impedance of the wall.