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.
|Number of pages||8|
|Journal||Transactions of the Japan Society for Aeronautical and Space Sciences|
|State||Published - 1 Nov 1986|