Abstract
A laser-induced fluorescence technique for time-averaged planar velocity measurements in nonreacting compressible flow is reported. The technique is based on the detection of fluorescence from a Doppler-shifted absorption line of iodine molecules seeded into the flow field. We exploit the symmetry of the investigated flow field to eliminate the collisional impact shift from the measured total frequency shift of the iodine absorption spectrum. This reduces the amount of spectral data required for measuring two velocity components by a factor of 2 yet retains the accuracy of a counterpropagating laser sheets approach. The demonstration of this technique in a highly three-dimensional supersonic flow field represents what is to our knowledge the first planar velocity measurement with laser-induced fluorescence in which the contribution of the collisional shift is eliminated.
Sign-in/Register to access full text options 
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.
