Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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3D Acoustic Field Analysis in an Annular Combustor System under a Cold Flow Condition

환형 연소기 시스템에서 비연소 3D 음향장 해석

  • Lim, Jaeyoung (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University) ;
  • Kim, Daesik (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University)
  • Received : 2017.02.06
  • Accepted : 2017.07.29
  • Published : 2017.12.01
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Abstract

The current study has developed an in-house 3D FEM code in order to model thermoacoustic problems in an annular system and compared the acoustic field calculation results with measured ones from a benchmark combustor. From the comparison of calculation results with the measured data, the current acoustic code could successfully capture the various acoustic mode found in the annular system. In addition, it was found that the transverse waves in the combustor were strongly affected by the nozzle acoustic impedances, as well, the pressure distributions were closely related with the combustor acoustic pressure field.

본 연구에서는 환형 시스템에서 열음향 문제를 모델링하기 위하여 자체 3D 유한요소해석을 모델 개발을 통하여 음향장을 해석하였고, 다양한 음향 모드를 벤치마크 연소기의 실험 결과와 비교/검증하였다. 비교 결과, 본 해석에서 사용된 음향장 해석 코드는 환형 시스템에서 실험으로 계측된 다양한 음향모드들을 예측하는데 성공하였다. 또한 연소실의 횡방향 모드는 노즐의 음향 경계 조건의 영향을 크게 받게 되고, 노즐에서의 압력 분포 역시 연소실의 압력장과 밀접한 관련이 있는 것으로 나타났다.

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References

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