Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Dynamic Characteristics of Gas Centered Swirl Coaxial Injector Varying Tangential Inlet Diameter with Liquid Pulsation

기체 중심 동축형 분사기의 접선방향 유입구 지름 변화에 따른 액체 가진 연구

  • 오석일 (서울대학교 기계항공공학부) ;
  • 박구정 (서울대학교 기계항공공학부) ;
  • 김성주 (서울대학교 기계항공공학부) ;
  • 이형원 (서울대학교 기계항공공학부) ;
  • 윤영빈 (서울대학교 항공우주신기술연구소(IAAT)) ;
  • 최정열 (부산대학교 항공우주공학부)
  • Received : 2017.01.27
  • Accepted : 2017.03.08
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

It is important to study on the combustion instability to develop liquid rocket engines for preventing lower combustion efficiency and destruction of combustion chamber. There are many researches on simplex injector with liquid pulsation to solve this problem. In real rocket engine system, however, they use coaxial injectors. Therefore, research on coaxial injector with liquid pulsation is essential. In this study, we investigate dynamic characteristics of gas centered swirl coaxial injector varying tangential inlet diameter. A mechanical pulsator was used to generate an excitation in the liquid flow, and the response characteristics of the injector were confirmed. As tangential inlet diameter increased, mass flow rates increased and spray angle decreased. As tangential inlet diamter decreased, gain decreased because the pressure fluctuation in the injector manifold rarely passed through the inlet. Additionally, it was confirmed that a sufficiently small tangential inlet served as a damper.

Keywords

References

  1. 키무라 이츠로. 로켓공학. 경문사. 2004.
  2. V. Yang, and W. E. Anderson. Liquid Rocket Engine Combustion Instability. Progress in Astronautics and Aeronautics, Vol. 169, 1995.
  3. V. G. Bazarov, Liquid Injector Dynamics, Mashinostroenie, 1979.
  4. V. G. Bazarov and V. Yang, "Liquid-Propellant Rocket Engine Injector Dynamics", Journal of Propulsion and Power, Vol. 14, No. 5, 1998.
  5. B. Ahn, M. Ismailov, and S, D. Heister, "Forced Excitation of Swirl Injectors using a Hydro-Mechanical Pulsator", 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2-5 Ausust 2009, Denver, Colorado, AIAA 2009-5043.
  6. Q. Fu, L. Yang, and X. Wang, "Theoretical and Experimental Study of the Dynamics of a Liquid Swirl Injector", Journal of Propulsion and Power, Vol. 26, No. 1, January - February 2010.
  7. Y. Chung, H. Kim, S. Jeong, and Y. Yoon, "Dynamic Characteristics of Open-Type Swirl Injector with Varying Geometry", Journal of Propulsion and Power, Vol. 32, No. 3, 2016, pp. 583-591. https://doi.org/10.2514/1.B35729
  8. G. Park, J. Lee, S. Oh, Y. Yoon, and C. H. Sohn, "Characteristics of Gas-Centered Swirl Coaxial Injector with Acoustic Excitation of Gas Flow", AIAA Journal, Vol. 55, No. 3, pp. 894-901. https://doi.org/10.2514/1.J055126
  9. 박구정, 이정호, 이인규, 윤영빈. "분무 조건에 따른 기체 중심 스월 동축형 분사기의 분무 특성", 한국액체미립화학회지, 19(4), 2014, pp. 167-173. https://doi.org/10.15435/JILASSKR.2014.19.4.167
  10. M. Suyari, and A. H. Lefebvre, "Film Thickness Measurements in a Simplex Swirl Atomizer", Journal of Propulsion and Power, Vol. 2, No. 6, 1986, pp. 528-533 https://doi.org/10.2514/3.22937
  11. S. Kim, T. Khil, D. Kim, and Y. Yoon, "Effect of Geometric Parameters on the Liquid Film Thickness and Air Core Formation in a Swirl Injector", Measurement Science and Technology, Vol. 20, No. 1, 2009.
  12. L. Bayvel and Z. Orzechowski, Liquid Atomization. 1993.