Dr. William Slaton, Associate Professor in the Department of Physics and Astronomy, and former UCA Student, Asami Nishikawa had a paper published in the January 2015 issue of The Journal of the Acoustical Society of America:
Aeroacoustic response of coaxial wall-mounted Helmholtz resonators in a low-speed wind tunnel
[RR] Pages: 253–260
ABSTRACT: The aeroacoustic response of coaxial wall-mounted Helmholtz resonators with different neck geometries in a low-speed wind tunnel has been investigated. Experimental test results of this system reveal a strong aeroacoustic response over a Strouhal number range of 0.25 to 0.1 for both increasing and decreasing the flow rate in the wind tunnel. Aeroacoustic response in the low-amplitude range has been successfully modeled by describing-function analysis. This analysis, coupled with a turbulent flow velocity distribution model, gives reasonable values for the location in the flow of the undulating stream velocity that drives vortex shedding at the resonator mouth. Having an estimate for the stream velocity that drives the flow-excited resonance is crucial when employing the describing-function analysis to predict aeroacoustic response of resonators.
Ms. Nishikawa graduated Magna Cum Laude from UCA in May 2011 with a double major in Physics and Mathematics. She is currently doing graduate work at The University of Mississippi.