Journal of ILASS-Korea (한국분무공학회지)

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

DOI QR Code

Characteristics of Gel Propellant Spray from a Pintle Injector

핀틀 인젝터를 사용한 젤 추진제 분무 특성 연구

  • 이건웅 (한국항공대학교 대학원 항공우주및기계공학과) ;
  • 송우석 (한국항공대학교 대학원 항공우주및기계공학과) ;
  • 황주현 (한국항공대학교 대학원 항공우주및기계공학과) ;
  • 황용석 (국방과학연구소 제4 기술연구본부) ;
  • 구자예 (한국항공대학교 항공우주및기계공학부)
  • Received : 2019.05.18
  • Accepted : 2019.06.18
  • Published : 2019.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Shear coaxial injectors were commonly used in rocket engine combustor. They showed good combustion performance. However it is not easy to control the thrust. Pintle injectors were not as popular as the coaxial injectors so far, they have a great advantage over the coaxial injectors. That is, it is relatively easy to control the thrust. Spray characteristics of gel type propellant from movable sleeve pintle injector were investigated. Water with 0.05% of Carbopol 940 was used as gel simulant instead of kerosene gel combined with Thixarol ST for academic purpose. Experiments were performed in various temperature, pressure and pintle opening condition. The results were compared with neat liquid spray. It is also verified that the capabilites of the injector by adjusting the pintle opening.

Keywords

OMHHBZ_2019_v24n2_82_f0001.png 이미지

Fig. 1 Comparison of various gels

OMHHBZ_2019_v24n2_82_f0002.png 이미지

Fig. 2 Viscosity of 0.05% Water gel depending on shear rate and its power-law modeling

OMHHBZ_2019_v24n2_82_f0003.png 이미지

Fig. 3 Schematic of flow visualization experimental apparatus (6)

OMHHBZ_2019_v24n2_82_f0004.png 이미지

Fig. 4 Schematic of pintle injector

OMHHBZ_2019_v24n2_82_f0005.png 이미지

Fig. 5 Comparison of liquid/liquid spray and gel/liquid spray at various injection pressure

OMHHBZ_2019_v24n2_82_f0006.png 이미지

Fig. 6 Spray half angle depending on mass flow rate of simulants

OMHHBZ_2019_v24n2_82_f0007.png 이미지

Fig. 7 Water gel vicosity depending on temperature

OMHHBZ_2019_v24n2_82_f0008.png 이미지

Fig. 8 Gel simulant injection temperature

OMHHBZ_2019_v24n2_82_f0009.png 이미지

Fig. 9 Gel/Water Spray visualization images of pintle injector at different temperature

OMHHBZ_2019_v24n2_82_f0010.png 이미지

Fig. 10 Spray visualization images of pintle injector at different pintle opening distance

Table 1 Comparison between kerosene gel and water Gel

OMHHBZ_2019_v24n2_82_t0001.png 이미지

Table 2 Design parameters of pintle injector

OMHHBZ_2019_v24n2_82_t0002.png 이미지

References

  1. M. J. Casiano, J. R. Hulka, and V. Yang, "Liquid-Propellant Rocket Engine Throttling : A Comprehensive Review", Journal of Propulsion and Power, Vol. 26, No. 5, 2010, pp. 897-923. https://doi.org/10.2514/1.49791
  2. G. A. Dressler and J. M. Bauer, "TRW Pintle Engine Heritage and Performance Characteristics", Proceedings of 36th AIAA/ ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2000, AIAA 2000-3871.
  3. D. K. Huzel and D. H. Huang, "Modern Engineering for Design of Liquid-propellant Rocket Engines", AIAA, 1992.
  4. B. W. Barry and M. C. Meyer, "The rheological properties of carbopol gels I. Continuous shear and creep properties of carbopol gels", International Journal of Pharmaceutics, Vol. 2, No. 1, 1979, pp. 1-25. https://doi.org/10.1016/0378-5173(79)90025-5
  5. I. Lee and J. Koo, "Break-up Characteristics of Gelled Propellant Simulants with Various Gelling Agent Contents", Journal of Thermal Science, Vol. 19, No. 6, 2010, pp. 545-552. https://doi.org/10.1007/s11630-010-0422-9
  6. J. M. Green, D. C. Rapp, and J. Roncace, "Flow Visualization of a Rocket Injector Spray Using Gelled Propellant Simulants", Proceedings of 27th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 1991, AIAA 91-2198
  7. B. Natan, V. Perteghella, and Y. Solomon, "Hypergolic Ignition of Oxidizers and Fuels by Fuel Gelation and Suspension of Reactive or Catalyst Particles", Proceedings of 46th AIAA/ASME/ SAE/ASEE Joint Propulsion Conference and Exhibit, 2010, AIAA 2010-7144.
  8. 박선정, 신동수, 이건웅, 황주현, 구자예, 황용석, "젤 추진제를 사용하는 가변 슬리브 인젝터의 분무특성", 한국추진공학회 2018년도 추계학술대회 논문집, 2018.
  9. 박선정, 남정수, 이건웅, 구자예, 황용석, "딥 스로틀링 가변 슬리브 인젝터의 추력제어 성능", 한국항공우주학회지, 제46권, 제6호, 2018, pp. 487-495. https://doi.org/10.5139/JKSAS.2018.46.6.487
  10. P. Cheng, Q. Li, S. Xu, and Z. Kang, "On the Prediction of Spray Angle of Liquid-liquid pintle injectors", Acta Astronautica, Vol. 138, 2017, pp. 145-151. https://doi.org/10.1016/j.actaastro.2017.05.037
  11. Y. Solomon and B. Natan, "Experimental Investigation of the Combustion of Organic-gellant-based Gel Fuel Droplets", Combustion Science and Technology, Vol. 178, No. 6, 2006, pp. 1185-1199. https://doi.org/10.1080/00102200600620259