Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Disintegration of Cryogenic Jet in Super-critical Environment

초임계 환경으로 분사되는 극저온 제트의 분열

  • 이건웅 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 김도헌 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 구자예 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2013.08.31
  • Accepted : 2013.09.23
  • Published : 2013.09.30
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Abstract

Sub/supercritical spray experiments were conducted, and cryogenic nitrogen and gaseous argon were selected for simulants. liquid nitrogen and gaseous argon were injected in subcritical case, and supercritical nitrogen and near-critical gaseous argon were injected in near-critical/supercritical cases. shadowgraph method was used to visualize spray, and analyzed about the breakup length. The breakup length was measured from numbers of Instantaneous shadowgraph Images from each case, and they were compared with momentum flux ratios and density ratios. It was observed that the relation between breakup length and momentum flux ratio was fitted into former experiment results. and the reasonable constant was suggested about the relation between breakup length and density ratio.

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References

  1. C. Segal and S. A. Polikhov, "Subcritical to supercritical mixing", AIP Physics of Fluids 20, 052101, 2008. https://doi.org/10.1063/1.2912055
  2. A. Roy and C. Segal, "Experimental Study of Fluid Jet Mixing at Supercritical Conditions", Journal of Propulsion and Power, Vol. 26, No.6, November-December pp. 1205-1211, 2010. https://doi.org/10.2514/1.48462
  3. A. Roy and C. Segal, "Sub-to-Supercritical Mixing and Core Length Analysis of a Single Round Jet", AIAA 2011-792, January, pp. 1-14, 2011.
  4. W. Mayer, A. Schik, C. Schweitzer and M. Schaeffler, "Injection and mixing processes in high pressure LOX/ GH2 rocket combustors", AIAA 96-2620, July, pp. 1-15, 1996.
  5. M. Oschwald, J. J. Smith, R. Branam, J. Hussong, A. Schik, B. Chehroudi, and D. Talley, "Injection of fluids into supercritical environments", Combustion Science and Technology 178, pp. 49-100, 2006. https://doi.org/10.1080/00102200500292464
  6. D. W. Davis, "On the behavior of a shear-coaxial jet, spanning sub- to supercritical pressures, with and without an externally imposed transverse acoustic field", Ph.D Thesis, The Pennsylvania State University, 2006.
  7. D. W. Davis and B. Chehroudi, "Shear-coaxial jet from a rocket-like injector in a transverse acoustic field at high pressures", AIAA ASME, 44th, pp. 1-18, 2006.
  8. B. Chehroudi, S. H. Chen, F. Bracco and Y. Onuma, "On the intact core of full-cone sprays", Society of Automotive Engineers, 1985.