论文信息 - Sound transmission in 180o duct bends of rectangular section

Sound transmission in 180o duct bends of rectangular section

Sound transmission in 180 o rectangular bends in rectangular section ducts is studied. Two models, a potential flow approach and an acoustic modal solution, are used and the relative accuracy of the results is assessed, by comparison with experimental data. An accurate method of predicting the bend's behaviour is described.

A. Cummings

[1] William E. Zorumski. Generalized radiation impedances and reflection coefficients of circular and annular ducts , 1973 .

[2] J. Miles. The Diffraction of Sound Due to Right‐Angled Joints in Rectangular Tubes , 1947 .

[3] P.O.A.L. Davies,et al. Performance of exhaust silencer components , 1971 .

[4] C. L. Morfey. A note on the radiation efficiency of acoustic duct modes , 1969 .

[5] P. E. Doak,et al. Excitation, transmission and radiation of sound from source distributions in hard-walled ducts of finite length (II): The effects of duct length , 1973 .

[6] T. L. Parrott. An improved method for design of expansion-chamber mufflers with application to an operational helicopter , 1973 .