Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Acoustic Modeling in a Gas Turbine Combustor with Backflow Using a Network Aproach

역류형 가스터빈 연소기에서 네트워크 접근법을 이용한 음향장 모델링

  • Son, Juchan (Department of Mechanical Engineering, Gangneung-Wonju National University) ;
  • Hong, Sumin (Department of Mechanical Engineering, Gangneung-Wonju National University) ;
  • Hwang, Jeongjae (Department of Gas Turbine Research, Korea Institute of Machinery and Materials) ;
  • Kim, Min Kuk (Department of Gas Turbine Research, Korea Institute of Machinery and Materials) ;
  • Kim, Daesik (Department of Mechanical Engineering, Gangneung-Wonju National University)
  • Received : 2021.06.07
  • Accepted : 2021.09.07
  • Published : 2021.10.31
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Abstract

In this work, we have developed a 1D network model aimed at predicting eigenvalues for resonance frequency analysis in a lab-scale industrial gas turbine single nozzle combustion system. Modern industrial gas turbines generally adopt combustors with very complex geometry and flow path to meet various design requirements simultaneously. The current study has developed a network model for combustion systems with backflow at the same axial location. The modeling results of resonance frequencies and mode distributions for a given system using the network model were validated from comparisons with prediction results using a 3D Helmholtz solver.

본 연구에서는 실험실 규모의 산업용 가스터빈 싱글노즐 연소기에서의 공진주파수 해석을 위한 고유값 도출을 목적으로 하는 1D 네트워크 모델을 개발하였다. 현대의 산업용 가스터빈은 다양한 요구 조건을 동시에 만족시키기 위하여 일반적으로 매우 복잡한 구조와 유동의 형태를 가지고 있다. 이러한 복잡한 연소기 특징 중 하나인 동일한 축 방향 위치에서 서로 반대 방향의 유동 흐름을 갖는 시스템에서의 네트워크 모델 구현을 목적으로 하였다. 네트워크 모델을 통해 음향장을 해석한 결과를 실제 형상을 그대로 해석한 헬름홀츠 기반의 모델링 결과와 비교하였을 때, 공진주파수와 모드 분포로부터 해석의 타당성을 검증하였다.

Keywords

Acknowledgement

본 연구는 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원(20206710100030)을 받아 수행된 연구 결과입니다.

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