Author(s)

N. Mohd-Ghazali & JP. McHugh

Abstract

Nonlinear simulation of acoustic waves in thermoacoustic resonator N. Mohd-~hazali'& J. P. M c ~ u ~ h ~ I Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, ~ a l a ~ s i a , ~ ~ e ~ a r t m e n t of Mechanical Engineering, University of New Hampshire, USA. Abstract This research was motivated by thermoacoustic refrigeration, the cooling effect achieved from the interaction of sound waves and solid boundaries. Systems that have produced sound from a temperature difference, and cooling generated from sound waves have been successfully built. Linear inviscid theory that has been used to explain these effects, however, is incapable of dealing with the nonlinear processes observed even at low oscillation amplitudes. A numerical simulation on an entire thermoacoustic resonator was completed with finite difference methodology. The method involved the solution to the compressible, twodimensional, unsteady, nonlinear, viscous continuity, momentum, and energy equations. The derivatives

Keywords