|
| An acoustic numerical model considering scattering effect of the thin-body |
| Received:December 17, 2011 Revised:April 02, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201302007 |
| KeyWord:thin-body BEM aeroacoustic discrete frequency noise axial flow fan |
| Author | Institution |
| 胡彬彬 |
上海交通大学 机械与动力工程学院,上海 |
| 欧阳华 |
上海交通大学 机械与动力工程学院,上海 |
| 吴亚东 |
上海交通大学 航空航天学院,上海 |
| 杜朝辉 |
上海交通大学 机械与动力工程学院,上海 |
|
| Hits: 2974 |
| Download times: 1631 |
| Abstract: |
| In this paper,a thin-body BEM/FW-H hybrid method is applied to establish numerical model considering the scattering effect of the thin body.This acoustic model can be used to predict acoustic wave propagation include the thin body such as the volute and fan casing.The establishment of the numerical model consists of the calculation of the noise source and propagation of the sound wave:firstly,establishing FW-H equation in the frequency domain,and the flow field calculated using computational fluid dynamics method is used to calculate the aerodynamic noise source; and then using a thin body BEM to calculate the scattering effect of the casing.The numerical results are compared with the experimental results and the classical duct theory.The results show that the numerical model is validated and can accurately predict the scattering effect of the casing wall on the sound source propagation. |