Experiments in Fluids

, Volume 27, Issue 6, pp 497–506

Supercritical nitrogen free jet investigated by spontaneous Raman scattering

  • M. Oschwald
  • A. Schik

Abstract

The injection of fuel and oxidizer in high pressure rocket combustion chambers is simulated in a model experiment dedicated to investigate the phenomenology of coaxial injection at supercritical pressures. Cryogenic nitrogen is injected in a pressurized reservoir of N2 at ambient temperature at 4 Mpa and 6 Mpa, above the critical pressure for nitrogen of 3.4 Mpa. The radial density distribution of the N2 is determined by spontaneous Raman-scattering, from the measured densities temperature distributions are derived. The radial density and temperature pro les are analyzed as a function of the distance from the injector for x/D = 1 to 30. The influence of density gradients, internal field effects and interference effects on the performance of the Raman technique when applied to turbulent high density flows is discussed.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • M. Oschwald
    • 1
  • A. Schik
    • 1
  1. 1.DLR Lampoldshausen, Space Propulsion Division, D-74239 Hardthausen, GermanyDE

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