비의류제품

development of a cw laser absorption diagnostic for measurement of cn in shock tube experiments

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 467
time-histories of the cn radical were monitored using a tunable ring dye laser to measure absorption at the p-branch bandhead of the b/sup 2/ sigma /sup +/ from x/sup 2/ sigma /sup +/ (0,0) band of cn in a shock tube. measurements of cn resulting from the pyrolysis of highly dilute mixtures of c/sub 2/n/sub 2/ in ar were compared with a spectroscopic model, and the location of maximum absorption for the bandhead was 25743.72 cm/sup -1/ ( lambda =388.444 nm). a second set of experiments at the maximum absorption frequency was conducted for temperatures between 2700 and 4900 k and pressures between 0.34 and 1.0 atm. these measurements were used to determine an expression for the effective collisional broadening coefficient. correlation of the data with the spectroscopic model led to a temperature- and pressure-dependent expression for the absorption coefficient
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