Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Performance Test of Metal 3D Printed Micro Gas Turbine Engine Combustor

초소형 가스터빈 엔진용 금속 3D 프린팅 연소기 성능 시험

  • Kim, Jaiho (Aeropropulsion Office, Korea Aerospace Research Institute) ;
  • Kim, Hyungmo (Aeropropulsion Office, Korea Aerospace Research Institute) ;
  • Park, Poomin (Aeropropulsion Office, Korea Aerospace Research Institute) ;
  • Rhee, Dongho (Aeropropulsion Office, Korea Aerospace Research Institute)
  • Received : 2019.06.11
  • Accepted : 2019.08.20
  • Published : 2019.12.01
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Abstract

In this study, a set of performance tests on 3D-printed combustor components were carried out to investigate the performance of 3D-printed component and its feasibility for micro gas turbine engines. The test were conducted for four different equivalence ratios under two different engine operating conditions. The measurement results show that the tested combustor had a low total pressure loss coefficient and a uniform exit temperature distribution. However, the combustion efficiency values are less than 93.5% owing to the large amount of UHC and CO, which is considerably lower than a typical gas turbine engine combustor. The performance data obtained from the tests will be used for combustor performance improvements using 3D-printing technology.

본 연구에서는 소형 무인기에 사용되는 초소형 가스터빈 엔진의 연소기를 3D 프린팅으로 제작하고, 시험 설비와 리그를 제작하여 연소기 단품 성능시험을 수행하였다. 연소기 성능시험은 두 가지 부하조건에서 당량비를 조절하여 각 부하조건 별 4가지 시험조건에서 수행하였다. 성능시험 결과 연소기의 압력손실과 출구온도분포는 우수하였지만, 연소가스에서 다량의 UHC와 CO가 검출되어 연소효율은 일반적인 가스터빈 연소기에 비해 아주 낮음을 확인하였다. 성능시험을 통해 획득한 정량적 성능데이터는 향후 3D 프린팅 기술로 성능이 개선된 연소기의 설계와 제작에 활용 할 예정이다.

Keywords

References

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