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This work presents a laser absorption spectroscopy-based three-dimensional velocity measurement technique for non-uniform high-speed flow diagnosis. Compared with the extra particle-based velocimetry methods, the developed technique avoids the issues raised by adding solid particles, through utilizing the Doppler shifts of absorption lines induced by the interaction between multi-angled laser beams...
Multispectral absorption tomography (MAT) is evolving into a mature imaging technique for flow diagnostics due to recent progress in both laser sources and nonlinear tomography. For the absorption-based technique, how to determine and utilize the most informative spectral lines are critical for successful implementation of the technique. In this work, we propose a method to select the optimal combination...
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