16-01-2016, 12:01 PM
Introduction
Thermoacoustics combines the branches of acoustics and thermodynamics together to move heat using sound. Acoustics is primarily concerned with the macroscopic effects of sound transfer like coupled pressure and motion oscillations.Thermoacoustics focuses on the microscopic temperature oscillations that accompany these pressure changes.
Basic Principle
Thermoacoustics is based on the principle that sound waves are pressure waves and they propagate causing compressions and rarefactions in the medium.In the region of compression the pressure is high, and in the region of rarefaction the pressure is low.
As sound waves are adiabatic in nature applying First law of thermodynamics here we get high temperature at compression and low temp at rarefaction.