Advancement of Non-Intrusive Optical Diagnostics for the
Study of Supersonic Aerothermodynamics
Christopher S. Combs
Research Assistant Professor
The continued development of non-intrusive diagnostics will be critical to the advancement of the state-of-the-art in high-speed aerodynamics research. Realizing the high-speed capabilities that have become an elevated national priority such as sustained hypersonic flight, atmospheric reentry, commercial supersonic flight, and air-breathing propulsion will require measurements at high-speed and high-enthalpy conditions that are currently difficult or impossible to make. Moreover, measurements in high-enthalpy and reacting flows are in increasing demand given the DoD’s push for research in hypersonics. Recent advances in imaging and laser technology—such as cheaper high-speed cameras, development of plenoptic cameras, and advances with pulse-burst lasers—have increased the potential capabilities for non-intrusive diagnostics. Considering the recent strides made in the development of non-intrusive diagnostics and the current measurement challenges faced by the experimental community, there is a need for researchers to leverage the recent advances in imaging and laser technology to develop the next generation of game changing non-intrusive diagnostics that will drive the next fifty years of high-speed aerothermodynamics research. Here, a review of recent diagnostics developments at The University of Texas and The University of Tennessee Space Institute will be presented, including an overview of the naphthalene planar laser-induced fluorescence technique—a diagnostic used to explore ablation physics by investigating scalar transport due to sublimation in supersonic flows. Results from an investigation of the Orion Multi-Purpose Crew Vehicle reaction control system jets using NO planar laserinduced fluorescence will be shared, as well. Lastly, data will be presented from research on the dynamics of transitional shock-wave/boundary layer interactions collected using a variety of measurement techniques.
Wednesday, February 15, 2017
Seaver Science Library, Room 150 (SSL 150)
Refreshments will be served at 3:15 pm.