Author/Authors :
Kuroki, Daichi Doshisha University, Kyoto, Japan , Sakamoto, Shin-ichi Department of Electronic Systems Engineering - University of Shiga Prefecture, Hikone, Japan , Onishi, Riku Doshisha University, Kyoto, Japan , Kawashima, Yuto Doshisha University, Kyoto, Japan , Kurata, Yuya Doshisha University, Kyoto, Japan , Shiraki, Kazuki Doshisha University, Kyoto, Japan , Watanabe, Yoshiaki Doshisha University, Kyoto, Japan
Abstract :
The conversion of heat and sound in a thermoacoustic system is performed in the region withtemperature gradient. It is known that, when water is added to the stack, a low temperature oscillation is realized and the output with the same level as that of a dry stack can be obtained. The expansion of the effective stack area which contributes to the thermoacoustic conversion induced by the addition of water is assumed as its cause. In this report, the influences of the change of the stack length in the wet condition on the oscillation temperature and on the output sound pressure are experimentally investigated. As the result, it is found that the oscillation temperature does not depend on the stack length while the output sound pressure depends on the stack length. This occurs because the temperature in the stack gradually creates a linear gradient between both ends under the influence of water and its producing vapor.
Keywords :
low temperature oscillation , thermoacoustic , linear , gradient , vapor
