Spatially resolved temperature measurements in a liquid using laser induced phosphorescence

This paper describes recent advances in the development of a temperature me asurement methodology based on phosphorescence of a tracer molecule in a li quid. The methodology represents an extension of molecular tagging velocime try (MTV). MTV is a laser-based technique of obtaining spatially resolved f luid velocity profiles. The methodology has the potential of providing spat ially resolved simultaneous measurements of velocity and temperature data o ver a planar domain. Presently, a method of obtaining temperatures over a r ange of 30 degreesC with a typical uncertainty of +/-1.0-1.5 degreesC has b een developed . Recent progress has resulted in a method of generating robu st calibration curves for use in subsequent temperature measurements. A dis cussion of the experimental methodology, calibration curve development, and error analysis is presented. Finally, simultaneous temperature and velocit y profile measurements using the method are demonstrated under dynamic cond itions.