Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지
DOI QR코드

DOI QR Code

The Gross Thrust Estimation Technique of Air-Breathing Engine

공기 흡입 엔진의 총추력 추정 기법

  • Kim, Jeongwoo (The 4th R&D Institute - 5th Directorate, Agency for Defense Development) ;
  • Jung, Chihoon (The 4th R&D Institute - 5th Directorate, Agency for Defense Development) ;
  • Ahn, Dongchan (The 4th R&D Institute - 5th Directorate, Agency for Defense Development) ;
  • Lee, Kyujoon (The 4th R&D Institute - 1st Directorate, Agency for Defense Development)
  • Received : 2017.06.07
  • Accepted : 2017.11.14
  • Published : 2018.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

It is definitely important to measure thrust during ground test when developing air-breathing engine, and in case of air-breathing engine, gross thrust should be calculated considering not only the measured thrust but also the force induced by the air flow of engine intake. Also, side thrust like yaw and pitch should be measured and analyzed using multi-component thrust measurement system. Engine performance was accurately evaluated by calculating the gross thrust of air breathing engine precisely which is analyzed from below serial procedure: labyrinth seal isolation, 1-axis gross thrust calculation, develop multi-component thrust measurement system, and side thrust analysis.

공기 흡입 엔진을 개발하기 위해서는 지상 시험을 통한 추력 측정이 반드시 필요한데, 공기 흡입 엔진은 추력 측정 장치에서 측정된 값 이외에도 엔진 흡입구로 들어오는 공기 유동에 의한 힘을 고려하여 총추력을 계산해야 한다. 또한 다분력 추력 측정 장치를 활용하여 요와 피치 방향의 측추력도 정확하게 측정하고 분석할 수 있어야 한다. 래버린스 씰 격리, 1축 총추력 계산, 다분력 추력 측정 장치 개발, 측추력 분석 등의 일련 과정을 통해 공기 흡입 엔진의 총추력을 정밀하게 추정하여 엔진 성능을 보다 정확하게 평가할 수 있게 하였다.

Keywords

References

  1. Joubert, L., "Mathematical Modeling of Leakage Flow Through Labyrinth Seals," M.S. Dissertation, School of Mechanical and Materials Engineering, Potchefstroom University for Christian Higher Education, Potchefstroom, South Africa, 2013.
  2. Kim, J.W., Kim, S.H. and Lee, K.J., "Design of Labyrinth Seal for Air Flow Duct Connection," KIMST Annual Conference Pro-ceedings, Jeju, Korea, pp. 2286-2289, June 2011.
  3. Ahn, D.C., Jung, C.H., Kim, J.W. and Lee, K.J., "Mechanical Isolation Technique for the Intake with Non-axisymmetric Temperature Distribution in the Thrust Stand," KIMST Annual Autumn Conference Proceedings, Daejeon, Korea, pp. 690-691, Nov. 2015.
  4. Jung, C.H., "Mechanical Isolation Method for an Air Intake Duct with Vertical Temperature Gradient," Journal of the Korean Society of Propulsion Engineers, Vol. 20, No. 4, pp. 87-93, 2016. https://doi.org/10.6108/KSPE.2016.20.4.087
  5. Covert, E.E., James, C.R., Kimzey W.F., Richey, G.K. and Rooney E.C., Thrust and Drag: Its Prediction and Verification, Princeton Combustion Research Laboratories Inc., Monmouth Junction, N.J., U.S.A., 1985.
  6. Kim, J.W., Jin, S.W. and Lee, K.J., "Gross Thrust Calculation in an Air Intake Duct Containing a Labyrinth Seal," KSPE Fall Conference Proceedings, Gyeongju, Korea, pp. 113-118, Dec. 2013.
  7. Runyan, R.B., Rynd, Jr., J.P., and Seely, J.F.,"Thrust Stand Design principles," 17th AIAA Aerospace Ground Testing Conference, Nashville, T.N., USA, AIAA-1992-3976, July 1992.
  8. Lee, K.J., Jung, C.H. and Ahn, D.C., "Multi-component Thrust Measurement for Air-breathing Engine," High Energy & Defense Material Conference Proceedings, Daejeon, Korea, pp. 53-56, Nov. 2014.
  9. Lee, K.J., Jung, C.H. and Ahn, D.C., "The Effect of the Bolted Joint Stiffness on the Thrust Measurement Stand," Journal of the Korean Society of Propulsion Engineers, Vol. 20, No. 5, pp. 31-39, 2016. https://doi.org/10.6108/KSPE.2016.20.5.031