Extended quantitative fluorescence imaging for multicomponent and staged injection into supersonic crossflows

Hidemi Takahashi, Shuzo Ikegami, Goro Masuya, Mitsutomo Hirota

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The fluorescence ratio technique for processing planar laser-induced fluorescence data was extended for quantitative imaging of the injectant mole-fraction and density in multicomponent and multiinjection configurations in a nonreacting supersonic mixing flowfield. The method was experimentally validated in a mixing flowfield formed by single or staged sonic transverse injection into a Mach 2.0 supersonic air stream. Gaseous helium and air were used as injectants. Injectant mole-fraction distributions obtained by the present method were confirmed by comparison with gas-sampling data. Density distributions were validated with the oblique shock relation. The new method worked well for the multistaged injection configuration. Phase-locked measurement for the pulsed secondary injection was also tested. Results demonstrated the applicability of the new method to the pulse injection as well.

Original languageEnglish
Pages (from-to)798-807
Number of pages10
JournalJournal of Propulsion and Power
Volume26
Issue number4
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

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