Masters Theses
Date of Award
8-2010
Degree Type
Thesis
Degree Name
Master of Science
Major
Aerospace Engineering
Major Professor
Gary Flandro
Committee Members
Gregory Sedrick, Trevor Moeller
Abstract
The piston-driven oscillator is traditionally modeled by directly applying boundary conditions to the acoustic wave equations; with better models re-deriving the wave equations but retaining nonlinear and viscous effects. These better models are required as the acoustic solution exhibits singularity near the natural frequencies of the cavity, with an unbounded (and therefore unphysical) solution. Recently, a technique has been developed to model general pressure oscillations in propulsion systems and combustion devices. Here, it is shown that this technique applies equally well to the piston-driven gas-column oscillator; and that the piston experiment provides strong evidence for the validity of the general theory. Using a modified piston-tube apparatus, agreement between predicted and observed limit-cycle amplitudes is observed to be on the order of 1%.
Recommended Citation
Wilson, Andrew William, "NONLINEAR ACOUSTICS OF PISTON-DRIVEN GAS-COLUMN OSCILLATIONS. " Master's Thesis, University of Tennessee, 2010.
https://trace.tennessee.edu/utk_gradthes/758
Included in
Aerodynamics and Fluid Mechanics Commons, Dynamics and Dynamical Systems Commons, Dynamic Systems Commons, Fluid Dynamics Commons, Non-linear Dynamics Commons, Propulsion and Power Commons