Rotational energy transfer and LIF temperature measurements

✍ Scribed by David R. Crosley; Gregory P. Smith

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 436 KB
• Volume: 44
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(82)90060-8

✦ Synopsis

In a previous study, OH molecules in the burnt gases of a CH4]air flame were excited to a single v', J' level using a laser, and the resulting fluorescence spectra were measured. It was found that the electronically excited OH did not rotationally thermalize before radiating, and it was postulated that this could cause significant systematic errors in rotational temperatures deduced from excitation scans. We here report excitation scans showing quantitative agreement with the results of a model based on the independent information from those earlier rotational population distributions. Errors of several hundred degrees can result using a typical detector ban@ass configuration.