This work advances optical measurement techniques for situations where conventional probes are too intrusive and standard imaging methods do not provide the needed access. The research includes Doppler lidar for velocity measurement in wind-tunnel flows and back-imaged pressure-sensitive paint for resolving the surface-pressure footprint of propellers operating near the ground. Both approaches are built around the same experimental priority: obtaining useful flow information while disturbing the flow as little as possible. The result is a diagnostic capability that reaches difficult geometries and boundary conditions without sacrificing physical relevance.
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Next Generation Aerodynamic Measurement TechniquesSeeing the Invisible
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Barnhart, Samuel A., and Sidaard Gunasekaran. "Investigation of Doppler Lidar for Velocity Measurements in Wind Tunnels." In AIAA Scitech 2020 Forum, p. 1021. 2020. https://doi.org/10.2514/6.2020-1021
Back-Imaging of Pressure-Sensitive Paint to Determine Close Proximity Ground Effects of Propellers
Kulig, Jacob, Jielong Cai, Sidaard Gunasekaran, and Carson L. Running. "Back-Imaging of Pressure-Sensitive Paint to Determine Close Proximity Ground Effects of Propellers." In AIAA SCITECH 2024 Forum, p. 0878. 2024. https://doi.org/10.2514/6.2024-0878
