Abstract
The author's previous study showed that modes and magnitudes of heat input at a heater in thermoacoustic oscillators related greatly to generating of self-excited oscillation. We have carried out a numerical simulation on thermoacoustic phenomena in order to clarify the operating condition of temperature difference between both ends of a regenerator. A simple physical model in which steel wool is inserted into a test tube as a regenerator is used. Transient one-dimensional equations are solved utilizing a TVD scheme. As a result, it was found that self-excited oscillation was generated under the condition of temperature difference of 90K or above, and not under the condition of temperature difference of 60K or below. Therefore, it is considered that the numerical simulation of this study is useful to investigate the operating condition of temperature difference between both ends of a regenerator.
