High pressure spray field dynamics in turbulent mixing layers

Joseph C. Oefelein, Vigor Yang

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

High-pressure spray-field dynamics have been systematically analyzed in turbulent, two-dimensional mixing layere using recently obtained correlations which describe droplet dynamics in high-pressure convective environments. Overall objectives are to gain insight with respect to: (1) the many uncertainties associated with modeling turbulent chemical spray-field dynamics at high-pressure, (2) the sensitivity of these dynamics to various modeling assumptions and (3) the fundamental coupling mechanisms associated with high-pressure spray field dynamics. The computational domain consists of two co-flowing hydrogen streams, initially at 1000 K, with a dilute 100 K oxygen spray injected at the splitter plate. In the current study, only vaporization processes are considered. Four cases are analyzed. The first is a simulation at 1 atmosphere using classical low-pressure correlations to provide a point of reference with respect to established low-pressure theory. The remaining three are performed using the high-pressure correlations. Of these three, the first is performed at 100 atmospheres assuming droplet vaporization dynamics exhibit a linear dependence with respect to time. The latter two are performed at 400 atmospheres, one assuming a linear dependence and one assuming a non-linear dependence as quantified through direct numerical simulations of isolated oxygen droplets vaporizing in a supercritical, convective, hydrogen environment. Results highlight the dramatic effect of pressure on overall spray-field dynamics. Comparisons between cases suggest that the path dependency associated with droplet vaporization rates has a negligible effect on overall spray-field dynamics. Future work will provide a more definitive assessment with combustion.

Original languageEnglish
Publication statusPublished - 1995
Event31st Joint Propulsion Conference and Exhibit, 1995 - San Diego, United States
Duration: 1995 Jul 101995 Jul 12

Other

Other31st Joint Propulsion Conference and Exhibit, 1995
CountryUnited States
CitySan Diego
Period95-07-1095-07-12

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Systems Engineering
  • Aerospace Engineering

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