Accession Number:

ADA615887

Title:

Energy Conversion in High Enthalpy Flows and Non-equilibrium Plasmas

Descriptive Note:

Journal article preprint

Corporate Author:

OHIO STATE UNIV COLUMBUS DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Report Date:

2014-01-01

Pagination or Media Count:

47.0

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 rotationaltranslational 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.

Subject Categories:

  • Fluid Mechanics
  • Optics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE