THE ACCURACY OF BEAM-AVERAGED INTERFEROMETRIC TEMPERATURE MEASUREMENTS IN A THREE-DIMENSIONAL FIELD

摘要

A classical or holographic interferometer can be used to measure the average fluid tem- perature integrated in the direction of the test/object beam. However, such beam-averaged measurements are not exact for a three-dimensional temperature field, when a standard two-dimensional analysis technique is applied. In the current study, an analysis is per- formed to determine the error in the average fluid temperature measurement caused by temperature variations in the light beam direction.