Abstract
As part of a study into the use of infra-red techniques for determination in situ of chemical species concentrations in rocket combustion gases, the infra-red emission and absorption of hot carbon dioxide were measured in hydrocarbon combustion gas streams and in a furnace-heated gas cell. The absorption of carbon dioxide in a fully combusted gas stream from a propane-air flame was measured at 4·40μ. The composition of the gas was calculated from thermochemical data, using temperatures measured by an infra-red monochromatic radiation method. Temperatures ranged from 1215° to 1290° K, and the chemical species were CO 2, H 2 O, O 2, and N 2. The infra-red absorption measured in the burnt gases was compared to the infra-red absorption of carbon dioxide in a gas cell heated in a furnace. The optical depth of the furnace-heated gas was made equal to that of the combustion gas, and the furnace temperature equalled the exhaust gas temperature at the measurement station. The combustion gas and furnace data agreed within the experimental error. This result indicates the feasibility of using the furnace-gas cell technique as a calibrating means for determining carbon dioxide concentration in a combustion gas stream. It also appears feasible to use temperatures measured by the infra-red technique to calculate the composition of exhaust gases for equilibrium situations. These methods are particularly useful in cases of Beer's law failure.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
