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Review of Entropy Wave in a Gas Turbine Combustor

가스터빈 연소기에서 엔트로피파에 대한 고찰

  • Kim, Daesik (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University) ;
  • Yoon, Myunggon (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University)
  • 김대식 (강릉원주대학교 기계자동차공학부) ;
  • 윤명곤 (강릉원주대학교 기계자동차공학부)
  • Received : 2017.08.08
  • Accepted : 2018.03.05
  • Published : 2018.03.30

Abstract

Entropy waves(or hot spots) in a gas turbine combustor are generated by irregular heat release from flames, then can be coupled with acoustic waves when they are accelerated at the exit of the combustor. This coupling mechanism between the entropy and the acoustic waves is generally known to be one of the triggers for combustion instability, which is commonly called "indirect" combustion noise. This paper reviews the fundamental theories on generation, propagation, and coupling with acoustic field of entropy waves and recent research results on the indirect combustion noise for gas turbine combustors.

Acknowledgement

Supported by : 한국연구재단, 산업통상자원부

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