Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2001.05a
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- Pages.1009-1014
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- 2001
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- 1598-2548(pISSN)
Numerical Analysis of Nonlinear Acoustic Characteristics in Axisymmetric Resonant Tubes for Sonic Compressors
음향 압축기 설계를 위한 축대칭 공명튜브 내부음장의 수치해석 및 특성연구
Abstract
A numerical investigation on nonlinear oscillations of gas in an axisymmetric resonant tube is presented. When a tube is oscillated at a resonant frequency, acoustic variables such as density, velocity, and pressure undergo very large perturbation, often described as nonlinear oscillation. In order to analyze these phenomena, axisymmetric 2-D nonlinear governing equations have been derived and solved numerically. Numerical simulations were accomplished for cylindrical, conical, and 1/2 cosine-shape tubes, which have same volume and length. For conical and 1/2 cosine-shape tubes, very large variation of pressures can be induced without shock formation except the cylindrical tube. In addition, the results well agree to those of 1-D simple model analysis.
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