HIGH-TEMPERATURE ABSORPTION BY PURE CO(2) FAR LINE WINGS IN THE 4 MU-M REGION

We present, for the first time. shock-tube measurements of the absorpt ion of infrared radiation by pure CO2 near 4 mum up to the temperature of 1200 K. The experimental values are in good agreement with previou s determinations up to 800 K. These results demonstrate the interestin g point of this new measurement technic and the investigated temperatu re and pressure ranges are extended toward those of the combustion med ia. Comparisons with calculations confirm the strongly sublorentzian b ehavior of the far wings Of CO2 absorption lines; the accuracy of prev iously published models based on empirical corrections to the Lorentzi an profile is also shown.