A numerical method for computation of sound radiation from an unflanged duct
Chen, X.X., Zhang, X., Morfey, C.L. and Nelson, P.A. (2004) A numerical method for computation of sound radiation from an unflanged duct. Journal of Sound and Vibration, 270, (3), 573-586. (doi:10.1016/j.jsv.2003.09.055)
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Official URL: http://dx.doi.org/10.1016/j.jsv.2003.09.055
Description/Abstract
Some issues involved in establishing a numerical model for sound radiation from a straight duct are addressed in this paper. The main ingredient of the numerical method is solutions of linearized Euler equations using a high order compact scheme. Farfield directivity is estimated through an integral solution of Ffowcs–Williams Hawkings equations. A generic test case of planar wave radiation from an unflanged duct is studied. The sound pressure level and wave propagation in the nearfield are analyzed, together with the farfield directivity. Comparison with analytical solutions shows good agreement. The effect of grid resolution on the sound radiation pattern and the construction of integration surface on the farfield directivity are discussed.
| Item Type: | Article |
|---|---|
| Additional Information: | I.M.A. Conference on Computational Aeroacoustics, London, UK, Apr 2002 |
| ISSN: | 0022-460 (print) |
| Related URLs: | http://dx.doi.org/10.1016/j.js...003.09.055 |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences University Structure - Pre August 2011 > Institute of Sound and Vibration Research |
| ePrint ID: | 22619 |
| Deposited On: | 06 Mar 2007 |
| Last Modified: | 01 Jun 2011 17:14 |
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