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Cavitation Instability of Turbopump Assembly Test for KSLV-II

한국형 발사체용 터보펌프 조립체 시험에서의 캐비테이션 불안정성

  • Kim, Dae-Jin (Turbopump Team, Korea Aerospace Research Institute) ;
  • Choi, Chang-Ho (Turbopump Team, Korea Aerospace Research Institute) ;
  • Kim, Jin-Sun (Turbopump Team, Korea Aerospace Research Institute)
  • 김대진 (한국항공우주연구원 터보펌프팀) ;
  • 최창호 (한국항공우주연구원 터보펌프팀) ;
  • 김진선 (한국항공우주연구원 터보펌프팀)
  • Received : 2020.05.19
  • Accepted : 2020.07.14
  • Published : 2020.10.31

Abstract

Turbopumps for liquid rocket engines are exposed to various cavitation instabilities under their operating conditions. The instabilities affect the stability of the turbopumps. To make sure of the stability of the turbopump of KSLV-II, the present work examined the characteristics of the cavitation instabilities during the turbopump assembly test. In the test, the LOx pump was operated under super-synchronous rotating cavitation and attached to uneven cavitation. In the vibration analysis of the fuel pump, the characteristic frequency by the super-synchronous cavitation of the LOx pump was clearly shown.

액체로켓엔진용 터보펌프는 작동 조건에서 캐비테이션 불안정성에 노출되며, 이는 터보펌프의 안정성에 영향을 미친다. 이를 확인하기 위해 터보펌프 조립체 시험 중 나타난 캐비테이션 불안정성의 특징을 살펴보았다. 시험 중 산화제펌프는 대표적인 캐비테이션 불안정성인 초조화 선회 캐비테이션과 부착 비대칭 캐비테이션에 노출되었다. 캐비테이션 불안정성이 발생되지 않는 조건에서 작동했던 연료펌프에서도 산화제펌프의 초조화 선회 캐비테이션에 의한 진동이 확인되었다.

Keywords

References

  1. J. Kim, C. Choi, E. Jeong, S. Jeon and S. Hong, "Development Status of a Turbopump for Korea Space Launch Vehicle(KSLV-II)," Proc. of 2012 Fall Conference of Korean Society for Aeronautical & Space Sciences, Jeju, Korea, Nov. 2012.
  2. C. Choi, D. Kim, B. Kang, H. Lee, H. Kwak, J. Kim, S. Yoon, S. Jeon and S. Heo, "Introduction of Turbopump for 75-ton Thrust Class Engine," Proc. of SASE 2019 Fall Conference, Changwon, Korea, pp. 78-79, Nov. 2019.
  3. Y. Tsujimoto, Y. Yoshida, Y. Maekawa, S. Watanabe and T. Hashimoto, "Observations of Oscillating Cavitation of an Inducer," ASME Journal of Fluids Engineering, vol. 119, no. 4, pp. 775-781, April 1997. https://doi.org/10.1115/1.2819497
  4. T. Hashimoto, M. Yoshida, M. Watanabe, K. Kamijo and Y. Tsujimoto, "Experimental Study of Rotating Cavitation of Rocket Propellant Pump Inducers," AIAA Journal of Propulsion and Power, vol. 13, no. 4, pp. 488-494, Dec. 1997. https://doi.org/10.2514/2.5210
  5. T. Zoladz, "Observations on Rotating Cavitation and Cavitation Surge From the Development of the FASTRAC Engine Turbopump," Proc. of the 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Las Vegas, N.V., U.S.A., AIAA-2000-3403, July 2000.
  6. S. Kobayashi, "Effects of Shaft Vibration on Occurrence of Asymmetric Cavitation in Inducer," JSME International Journal, Series B, vol. 49, no. 4, pp. 1220-1225, 2006. https://doi.org/10.1299/jsmeb.49.1220
  7. Y. Yoshida, M. Eguchi, T. Motomura, M. Uchiumi, H. Kure and Y. Maruta, "Rotordynamic Forces Acting on Three-Bladed Inducer Under Supersynchronous/Synchronous Rotating Cavitation," ASME Journal of Fluids Engineering, vol. 132, no. 6, Paper 061105. June 2010.
  8. L. Torre, A. Cervone, A. Pasini and L. d'Agostino, "Experimental Characterization of Thermal Cavitation Effects on Space Rocket Axial Inducers," ASME Journal of Fluids Engineering, vol. 133, no. 11, Paper 111303, Nov. 2011.
  9. O. Coutier-Delgosha, G. Caignaert, G. Bois and J.-B. Leroux, "Influence of the Blade Number on Inducer Cavitating Behavior," ASME Journal of Fluids Engineering, vol. 134, no. 8, Paper 081304, Aug. 2012.
  10. D. Kim, H. Sung, C. Choi and J. Kim, "Cavitation Instabilities During the Development Testing of a Liquid Oxygen Pump," AIAA Journal of Propulsion and Power, vol. 33, no. 1, pp. 187-192, 2017. https://doi.org/10.2514/1.B35988
  11. J. Kim, Y. Han and Y. Ko, "Construction and Validation Test of Turbopump Real-propellant Test Facility," Journal of the Korean Society of Propulsion Engineers, vol. 19, no. 4, pp. 85-93, Aug. 2015. https://doi.org/10.6108/KSPE.2015.19.4.085
  12. D. Kim, C. Choi and J. Kim, "Cavitation Instabilities of LOX Pump for KSLV-II," Proc. of 2016 Summer Conference of Korean Society for Fluid Machinery, Busan, Korea, July 2016.
  13. D. Kim, C. Choi and J. Kim, "Cavitation Instabilities of Fuel Pump for KSLV-II," Proc. of 2016 Summer Conference of Korean Society for Fluid Machinery, Busan, Korea, July 2016.
  14. D. Kim, H. Sung, C. Choi and J. Kim, "Cavitation Instabilities of an Inducer in a Cryogenic Pump," Acta Astronautica, vol. 132, pp. 19-24, 2017. https://doi.org/10.1016/j.actaastro.2016.12.007
  15. D. Kim and C. Choi, "Measurement of Cavitation Instability of Inducer," Proc. of SASE 2016 Fall Conference, Muju, Korea, Nov. 2016.