A frequency domain linearized Navier-Stokes equations approach to acoustic propagation in flow ducts with sharp edges.
A frequency domain linearized Navier-Stokes equations approach to acoustic propagation in flow ducts with sharp edges.
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DOI：
10.1121/1.3273899
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发表时间：
2010-02
期刊：
影响因子：
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通讯作者：
A. Kierkegaard;Susann Boij;Gunilla Efraimsson
中科院分区：
文献类型：
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作者：
A. Kierkegaard;Susann Boij;Gunilla Efraimsson
声波在管道中的传播通常用时域非线性Navier-Stokes方程方法来模拟。为了减少计算量，在频域进行了线性化方法的研究。给出了带孔板和平均流的直管中声波传播的计算。透射和反射的结果以双端口散射矩阵形式呈现，并与测量结果进行了比较，结果吻合良好。用频域线性化的Navier-Stokes方程方法模拟了波的传播。这种方法被发现是有效的情况下，声场不改变平均流场，即，当口哨没有发生。
Acoustic wave propagation in flow ducts is commonly modeled with time-domain non-linear Navier-Stokes equation methodologies. To reduce computational effort, investigations of a linearized approach in frequency domain are carried out. Calculations of sound wave propagation in a straight duct are presented with an orifice plate and a mean flow present. Results of transmission and reflections at the orifice are presented on a two-port scattering matrix form and are compared to measurements with good agreement. The wave propagation is modeled with a frequency domain linearized Navier-Stokes equation methodology. This methodology is found to be efficient for cases where the acoustic field does not alter the mean flow field, i.e., when whistling does not occur.