Citation

Abbasi MZ, Wilson PS, Ezekoye OA. J. Acoust. Soc. Am. 2022; 151(5): 3177.

Copyright

(Copyright © 2022, American Institute of Physics)

DOI

10.1121/10.0009800

PMID

35649912

Abstract

A compartment fire (a fire in a room or building) creates temperature gradients and inhomogeneous time-varying temperature, density, and flow fields. This work compared experimental measurements of the room acoustic impulse/frequency response in a room with a fire to numerically modeled responses. The fire is modeled using a Fire Dynamics Simulator (FDS). Acoustic modeling was performed using the temperature field computed by FDS. Room acoustics were modeled using two-dimensional ray and finite element modeling. A three-dimensional model was used to simulate an open flame. COMSOL(TM) Multiphysics was used for finite element acoustic modeling and BELLHOP(TM) for ray trace acoustics modeling. The results show that the fire causes wave-fronts to arrive earlier (due to the higher sound speed) and with more variation in the delay times (due to the sound speed perturbations). The resonance frequencies of low-frequency modes were shifted upwards. Model results are compared with data and show good agreement in observed trends.

Language: en