INFRARED SPECTROSCOPIC STUDY OF CARBON MONOXIDE IN A SUPERSONIC NOZZLE.

Haruaki Kishige*, Masahiro Inoue, Koji Teshima, Hiroyuki Matsui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Measurements of infrared emission spectra of carbon monoxide in the first overtone band were performed in the reflected region of a shock tube and in a supersonic nozzle flow. The vibrational population estimated from the spectra in the reflected region, whose temperature and pressure were 2,700-3,100 K and 187-200 kPa, respectively, showed the Boltzmann distribution. The measured spectra in supersonic nozzle flows with a reservoir temperature and pressure of 2,300-3,300 K and 520-565 kPa were similar to simulated ones obtained using numerical results for the translational temperature and vibrational population distribution by solving quasi-one-dimensional gas dynamic equations coupled with nonequilibrium vibrational relaxation equations. The measured vibrational energy almost agrees with the simulated one.

Original languageEnglish
Pages (from-to)134-141
Number of pages8
JournalTransactions of the Japan Society for Aeronautical and Space Sciences
Volume29
Issue number85
StatePublished - 1 Nov 1986

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