Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1719198 | Progress in Aerospace Sciences | 2015 | 17 Pages |
Abstract
Recent developments in the study of very high energy non-equilibrium fluid flows are reviewed. These are flows of molecular gases which exhibit substantial degrees of mode disequilibrium, specifically high energy in molecular vibrational and electronic modes, and high electron energies when the gases are weakly ionized. In contrast, the modes of molecular translation and rotation remain at lower energies. Attention is focused on high density, collision-dominated gases. Studies in two systems are presented: A small wind tunnel where an M=5 steady air flow over small models is produced, and a flowing carbon monoxide gas laser, exhibiting very high energy loading of the vibrational quantum states. The development of non-intrusive optical diagnostics to measure vibrational and electronic state populations and rotational/translational mode temperatures in the flows, with high spatial and temporal resolution, is presented. Kinetic modeling and experimental validation studies in these environments are also discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Kraig Frederickson, Sergey Leonov, Munetake Nishihara, Evgeny Ivanov, Igor V. Adamovich, Walter R. Lempert, J. William Rich,