title: Modular system for studying tonal sound excitation in resonators with heat addition and mean flow.
abstract: An educational experimental system has been developed for studying tonal sound generation in acoustic resonators. Tones are excited by either heat addition or vortex shedding in the presence of mean flow. The system construction is straightforward and inexpensive. Several test arrangements and experimental data are described in this paper. The experimental setups include a modified Rijke tube, a standing-wave thermoacoustic engine, a baffled tube with mean flow, and an acoustic energy harvester with a piezoelement. Simplified mathematical models for interpreting data are discussed, and references are provided to literature with more advanced analyses. The developed system can assist both graduate and undergraduate students in understanding acoustic instabilities via conducting and analyzing interesting experiments.
authors.affiliation: School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164-2920, USA. matveev@wsu.edu
authors.forename: Konstantin I
authors.initials: KI
authors.lastname: Matveev
authors.forename: Rafael
authors.initials: R
authors.lastname: Hernandez