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Sound Absorption In N2-H2o Gas Mixtures At Room Temperature And Low Frequency/Pressure Ratios, William Axam Griffin
Sound Absorption In N2-H2o Gas Mixtures At Room Temperature And Low Frequency/Pressure Ratios, William Axam Griffin
Mechanical & Aerospace Engineering Theses & Dissertations
This study was motivated by a need to obtain standard values of nitrogen's contribution to sound absorption in the Earth's atmosphere. Specific goals included accurate measurements of sound absorption in nitrogen - water vapor mixtures at room temperature and low frequency/pressure ratios, the determination of the N2 vibrational relaxation peak location, (f/P)max, on the f/P axis as a function of humidity, h, and critical evaluation of all results.
The free decay technique was used in a resonance tube to obtain ten sets of sound absorption data in N2-H2O gas mixtures and requisite companion …