Experimental investigation on the onset and damping behavior of the oscillation in a thermoacoustic prime mover

Experiments have been made on the onset and damping behavior of the oscilla tion in a thermoacoustic prime mover with nitrogen as the working fluids. I n contrast to the traditions indicating that the damping point coincide wit h the onset one, we find lags between the onset temperature and the damping temperature in the thermoacoustic oscillation. A hysteretic loop, due to t he temperature difference, is recognized for the first time. It is confirme d by all results of the nitrogen of 0.4-2.4 MPa. Some interesting phenomena observed in the experiments are also presented. (C) 1999 Elsevier Science Ltd. All rights reserved.