Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Active Control of Thermoacoustic Instability in Cylindrical Combustor with Low Speed Flow Field

저속 유동장이 있는 원통형 연소기에서의 열-음향학적 불안정에 대한 능동 제어 연구

  • 조상연 (서울대학교 대학원 항공우주공학과) ;
  • 이용석 (서울대학교 대학원 항공우주공학과, 현재 현대자동차) ;
  • 이수갑 (서울대학교 공과대학 항공우주공학과) ;
  • 배충식 (충남대 항공우주공학과, 현재 KAIST 기계공학과)
  • Published : 1998.10.01
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Abstract

Combusion instability due to thermoacoustic feedback in a ducted combustor usually excites severe noise and vibration, which could lead to result in the failure of the system or environmental dispute. In the present study, an active noise control(ANC) method with an adaptive algotithm is hired to suppress instability which has very discrete behavior in the frequency domain. Especially a feedback system is composed to evade hot environment of the combustor, and as a preliminary, the performance and stability of the controller is chekced by simulating the real situation with harmonic waves. Application to the real combustor showed serious reductions in sound pressure level by 20∼30 dB. It was also shown that the selected control system was very stable and effective.

Keywords

References

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