摘要
发展了一种三维有限元数值模型和计算方法来对矩形流管声场进行整体的计算。与以往的二维方法相比,此种数值方法不仅全面反映了矩形流管内声波的传播情况,而且提高了网格精度,从而大大扩展了对铺没有声衬的流管的计算领域。结果表明,该数值模型是有效和准确的,与其它方法和文献的计算结果吻合得非常好。同时,在大大增加计算量的同时,也对程序代码进行了优化工作,提高了计算效率。
A Three-Dimension FEM numerical model and the method for calculating the acousucs field in rectangular duct have been developed. Compared with those previous approaches, this numerical method not only comprehensively demonstrates the three dimension acoustic propagation in rectangular duct but also broadens the range of acoustic computation in flow duct with liner by using higher order accuracy. Concluded from the results, the numerical model is effective and accurate, and it coincides satisfactorily with other methods. Meanwhile, the code of this method is optimized as the amount of computation increases greatly, and the efficiency in calculating is improved.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第5期766-768,共3页
Journal of Engineering Thermophysics
关键词
流管
有限元
三维
声传播
flow duct
finite element method
three-dimension
acoustic propagation
