THERMOACOUSTIC

THERMOACOUSTIC

INTRODUCTION:

Thermo acoustics can be simply defined as the physics of the interaction of thermal and acoustic fields, especially in the form in which one gives rise to a significant component of the other.

Thermoacoustics as the name suggests is a field, which involves the use of knowledge in both acoustics and thermodynamics. Due to the theoretical complexity of each of these fields on their own, there has been little progress in thermoacoustics, particularly here in India. The numerical complexities of thermoacoustic engines are out weighed by the advantages of using the phenomenon. Thermoacoustic devices in operation are "low tech" devices, which have no moving parts and hence should require low maintenance. This makes the potential for their application desirable in many fields, applications would include, aerospace, industrial and in the third world. Thermoacoustic devises are currently used by high budget industries but are still able to be constructed from smaller budgets. They are silent in operation and will operate from any source of heat, including chemical fuels, solar radiations, waste heat from industrial processes etc.

A sound wave is associated with changes in pressure, temperature and density of the medium through which the sound wave propagates. In addition, the medium itself is moved around an equilibrium position. These fluctuations are that small in the sounds we hear day-to-day that they are unnoticed. The sound waves that are common in thermoacoustics however are extreme in magnitude, resulting in noticeable fluctuations.

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