Characteristics of Acoustic Damping Induced by Helmholtz Resonators with Various Geometric Factors in a Model Chamber

모형연소실내에서 헬름홀츠 공명기의 기하학적 형상 인자에 따른 음향 감쇠 특성

  • 최효현 (세종대학교 대학원 기계공학과) ;
  • 박이선 (세종대학교 대학원 기계공학과) ;
  • 손채훈 (세종대학교 기계항공우주공학부)
  • Published : 2010.05.27

Abstract

Acoustic design parameters of a Helmholtz resonator are studied experimentally and numerically for acoustic stability in a model acoustic tube. Acoustic damping is quantified by the amplitude of the fluid velocity in mass-spring-damper system. The length of an orifice, the volume of a cavity, and the diameters of an orifice and a cavity in the resonator are selected as design parameters for tuning of the resonator. It is found that acoustic damping capacity is increased by shorter orifice and longer cavity in the resonator. As the ratio of the orifice diameter to the cavity diameter increases in the resonator, the damping capacity decreases.

Acknowledgement

Supported by : 한국연구재단