
Prediction of breakout noise from an elliptical duct of finite length
This paper describes a predictive model for breakout noise from an elliptical duct or shell of finite length. The transmission mechanism is essentially that of “mode coupling”, whereby higher structural modes in the duct walls get excited because of non-circularity of the
wall. Effect of geometry has been taken care of by evaluating Fourier coefficients of the radius of curvature. The noise radiated from the duct walls is represented by that from a finite vibrating length of a semi infinite cylinder in a free field. Emphasis is on understanding the physics
of the problem as well as analytical modeling. The analytical model is validated with 3-D FEM. Effects of the ovality, curvature, and axial terminations of the duct have been demonstrated.
Document Type: Research Article
Publication date: 01 May 2010
NCEJ is the pre-eminent academic journal of noise control. It is the Journal of the Institute of Noise Control Engineering of the USA. Since 1973 NCEJ has served as the primary source for noise control researchers, students, and consultants.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- INCE Subject Classification
- Ingenta Connect is not responsible for the content or availability of external websites
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content