From laboratory to large-scale facility - Scaling of the RELIEF velocimetry technique

1996, American Institute of Aeonautioj and Astronautics, Inc. The system design issues associated with applying the RELIEF (Raman excitation + laser-induced electronic fluorescence) flow-tagging velocimetry technique to large-scale wind tunnels have been investigated. RELIEF measurements were obtained in laboratory air at tagging distances of 0. 5-1 m and imaging distances of 1-2 m to simulate the conditions which would be encountered in large facilities. The data indicate that velocity measurement accuracies of better than 1 m/s with a spatial resolution of 1 cm3 can be realized. The spectral characteristics of a tunable, line-narrowed broadband ArF excimer laser were assessed, and the laser was found to be a suitable alternative to the more expensive injection-locked laser commonly employed for RELIEF measurements.

From laboratory to large-scale facility - Scaling of the RELIEF velocimetry technique Conference Paper