DOI QR코드

DOI QR Code

Study of Gas-turbine Cranking Model using the Coast Down Experimental Results

Coast Down 시험데이터를 이용한 가스터빈엔진 시동모델 연구

  • Kim, Sun Je (The 4th R&D Institute - 5th Directorate, Agency for Defense Development) ;
  • Kim, Yeong Ryeon (The 4th R&D Institute - 5th Directorate, Agency for Defense Development) ;
  • Min, Seongki (The 4th R&D Institute - 5th Directorate, Agency for Defense Development)
  • Received : 2016.06.10
  • Accepted : 2017.01.03
  • Published : 2017.06.01

Abstract

Appropriate selection of the starter is essential for successful starting of the gas-turbine engine. Thus, aerodynamic drag during starting phase should be analyzed to assess the feasibility of the starter. In this paper, aerodynamic drag is modeled based on the speed profile from the engine coast down test, and it is scaled with respect to the target engine by comparing the compressor load. Afterward, the govern equation of the starting phase is developed with the torque model of the starter, and the design scheme to select the feasible starter will be finally suggested. The proposed model of starting phase will be useful to perform a preliminary design of the starting system of the gas-turbine engine.

가스터빈엔진의 시동점화 조건 달성 및 시동가속을 위해서는 엔진에 적합한 시동기를 선정하여야 한다. 이를 위해서는 시동 크랭킹 과정의 공력저항을 예측하여 시동성능을 파악하여야한다. 본 논문에서는 기 개발엔진의 Coast down 시험을 통하여 획득된 엔진속도 프로파일 데이터를 바탕으로 엔진 주축에 인간되는 공력저항을 도출하고, 압축기 부하를 기준으로 한 스케일링을 통해 대상엔진의 공력저항을 모델링하였다. 이후, 공력저항 모델과 공기시동기(ATS)의 토크 성능선도를 엔진 시동모델에 적용함으로써, 엔진시동에 적합한 시동기를 선정하는 방법을 제시한다.

Keywords

References

  1. Lim, B., Rhee, D. and Ahn, I., "Preliminary Design Procedure of Electric Starting System for Small GasTurbine Engine," Proceedings of the 2010 KSPE Fall Conference, Jeju, Korea, pp. 829-832, Nov. 2010.
  2. Alabin, M.A., Kats, B.M. and Litvinov, Y.A., "Starting of Aircraft Gas Turbine Engines," Foreign Science and Technology Center, FSTC-HT-23-766-70, 1972.
  3. Park, J.G., "Introduction of Road Load Measurement Method using the Coastdown Test," Journal of Korea Society of Automotive Engineers, Vol. 22, No. 2, pp. 43-48, 2000.
  4. Agrawal, R.K., Yunis, M. "A Generalized Mathematical Model to Estimate Gas Turbine Starting Characteristics," Transactions of the ASME, Vol. 104, Issue 1, pp. 194-201, 1982.