Acoustic resonances in gas-filled spherical bulb with parabolic temperature profile
Abstract
Acoustics is used to probe the temperature profile within a sulfur plasma lamp. A spherically symmetric temperature profile is assumed that drops with the square of the radius, consistent with a constant volumetric heating model. Acoustic resonance frequencies are calculated exactly in the case of an ideal gas. Experimental measurement of a few resonant frequencies allows determination of the temperature profile curvature. This technique can be viewed as an extension of ultrasonic resonant spectroscopy to systems that are highly non-uniform due to off-equilibrium energy flow.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 01, 2018
- Source ID
- 10.1121/1.5078599
Entities
People
- John P Koulakis
- Seth Pree
- Seth Putterman
Organizations
- Air Force Office of Scientific Research
- University of California, Los Angeles