Study on Moisture Stack for Low-Temperature - Oscillation of Thermoacoustic System-Effects of Stack Length on Oscillation Temperature and Sound Pressure

Abstract

In a thermoacoustic system, heat and sound are converted in the area with the temperature gradient. It is common
knowledge that adding water to the stack generates a low temperature oscillation and produces output comparable
to that of a dry stack. The increase in the effective stack area, which aids in the thermoacoustic conversion caused
by the addition of water, is assumed to be the cause. In order to ascertain the impacts of modifying the stack
length under wet conditions on oscillation temperature and output sound pressure, experimental study is
conducted in this paper. As a result, it is found that while the oscillation temperature is independent of the stack
length, the output sound is.