Propagation of Sound in Vibrationally Excited Nitrogen and Hydrogen Gas Mixtures
Abstract
Measurements of the resonant reverberation of sound in a tube containing N2/H2, N2/He, N2/CH4, and N2/H20 mixtures have shown an amplification of the sound following a rapid excitation of the gas by an electric discharge. This effect has been named SACER (Sound Amplification from Controlled Excitation Reactions). This paper reports similar measurements in N2/CO and in CO/H2/He mixtures. It has been possible in the past to determine vibrational relaxation times and relaxation times for the conduction of translational and vibrational energy to the tube wall from the changes in the translational temperature in the gas following the electric discharge. In the work reported here, these rates have been confirmed by direct measurement of the decay times of the CO infrared emission. Keywords: Nitrogen; Hydrogen; Helium; Vibrational excitation; Sound Amplification; SACER effect; Carbon monoxide; Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1989
- Accession Number
- ADA213002
Entities
People
- Timothy H. Ruppel
Organizations
- University of Mississippi