Free electron and vibrational temperature nonequilibrium in high temperature nitrogen
Abstract
The degree of coupling between free electron and nitrogen vibrational temperatures in weakly ionized nozzle expansions of shock-heated nitrogen has been determined. Free electron temperatures were measured with Langmuir probes while nitrogen vibrational temperatures were determined with a new instrument based on the electron beam technique. The resultant data were analytically correlated by coupling chemical nonequilibrium with nitrogen vibrational and free electron temperature nonequilibrium. It was found that a vibrational loss factor of 7 × 10-4 and an effective translational-rotational loss factor of 4.26 × 10-4 best predicted the measured electron temperature distributions.
- Publication:
-
Physics of Fluids
- Pub Date:
- August 1974
- DOI:
- 10.1063/1.1694931
- Bibcode:
- 1974PhFl...17.1539L
- Keywords:
-
- Electron Energy;
- Free Electrons;
- Gas Expansion;
- High Temperature Gases;
- Molecular Energy Levels;
- Nitrogen;
- Nonequilibrium Flow;
- Nozzle Flow;
- Air Flow;
- Blackout (Propagation);
- Electrostatic Probes;
- Energy Dissipation;
- Flow Geometry;
- Ion Temperature;
- Ionized Gases;
- Shock Heating;
- Temperature Distribution;
- Fluid Mechanics and Heat Transfer