TY  - EJOU
AU  - Langthjem, Mikael A.  
AU  - Nakano, Masami  

TI  - Application of the Time-Domain Boundary Element Method to Analysis of Flow-Acoustic Interaction in a Hole-tone Feedback System with a Tailpipe
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2013
VL  - 96
IS  - 4
SN  - 1526-1506

AB  - This paper is concerned with a mathematical model of a simple axisymmetric silencer-like model, consisting of a hole-tone feedback system equipped with a tailpipe. The unstable shear layer is modeled via a discrete vortex method, based on axisymmetric vortex rings. The aeroacoustic model is based on the Powell- Howe theory of vortex sound. Boundary integrals are discretized via the boundary element method; but the tailpipe is represented by the exact (one-dimensional) solution. It is demonstrated though numerical examples that this numerical model can display lock-in of the self-sustained flow oscillations to the resonant acoustic oscillations.
KW  - Self-sustained flow oscillations
KW  -  Acoustic resonance
KW  -  Hole tone
KW  -  Feedback cycle
KW  -  Flow-acoustic interaction
KW  -  Discrete Vortex Method
KW  -  Boundary Element Method

DO  - 10.3970/cmes.2013.096.227