Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Numerical Study on Transient Performance Behavior of a Turbofan Engine with Variable Inlet Guide Vane and Bleed Air Schedules

가변 입구 안내익과 블리드 공기 스케줄에 따른 터보팬 엔진에서의 천이 성능특성에 관한 수치연구

  • Kim, Sangjo (Department of Aerospace Engineering, Pusan National University) ;
  • Son, Changmin (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Kuisoon (Department of Aerospace Engineering, Pusan National University) ;
  • Kim, Myungho (The 4th R&D Institute, Agency for Defense Development) ;
  • Min, Seongki (The 4th R&D Institute, Agency for Defense Development)
  • Received : 2015.08.13
  • Accepted : 2015.09.11
  • Published : 2015.10.01
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Abstract

This paper performed a numerical study to analyse the transient performance behavior of a turbofan engine with variable inlet guide vane (IGV) and bleed air schedules. The low bypass ratio mixed flow turbofan engine was considered in this study. For modeling the compressor performance with IGV, the performance maps were generated by using a one-dimensional meanline analysis and feed to the engine simulation program. The IGV and bleed air according to the rotating speed were scheduled to satisfy 10% of surge margin at steady-state condition. The transient engine performance analysis was conducted with the schedules. The engine with IGV schedule showed a higher surge margin and lower turbine inlet temperature than the engine with bleed air schedule during the transient period.

본 연구에서는 가변 입구 안내익과 블리드 공기 스케줄에 따른 터보팬 엔진에서의 천이 성능특성을 수치적으로 분석하였다. 대상 엔진으로 저 바이패스비 혼합 흐름 터보팬 엔진을 선정하였다. 압축기 가변 입구 안내익에 따른 성능 변화를 고려하기 위해 평균 반경 해석법을 이용하여 압축기 성능성도를 도출하고 엔진 해석 프로그램에 입력하였다. 정상상태 조건에서 축류 압축기 서지마진 10%를 만족하도록 회전속도에 따른 가변 입구 안내익과 블리드 공기 스케줄을 각각 도출하였다. 도출된 스케줄을 이용하여 엔진 천이 성능해석을 수행하였다. 엔진 천이 성능해석 수행 결과 가변 입구 안내익을 사용하는 경우가 블리드 공기를 사용하는 경우보다 천이과정에서 높은 서지마진과 낮은 터빈 입구 온도를 보였다.

Keywords

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