Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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An Analysis of Aircraft Engine Inlet Acoustic Fields by using Finite Element Method

유한 요소법을 이용한 비행기 엔진 입구 음향장 해석

  • 전완호 (한국과학기술원 항공우주공학과) ;
  • 이덕주 (한국과학기술원 항공우주공학과)
  • Published : 1998.02.01
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Abstract

Internal and external acoustic fields of the engine inlet are calculated by using a finite element method. The far fields non reflecting boundary condition is enforced by using a wave envelope element, which is a kind of infinite element. The geometry is assumed an axisymetric duct. Sources of the fan are modeled by the Tyler and Sofrin's theory. Effects of uniformly moving medium are considered. A pulsating sphere and an oscillating piston problem are calculated to verify the external problems, and compared with exact solutions. When the wave envelope element is applied at the far boundary, the calculated finite element solutions show good agreements with the exact solutions. The engine inlet is solved with the combined internal and external grid. The cut-off phenomena on engine inlet duct are observed.

Keywords

References

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