Thermodynamic cycle of the traveling wave thermoacoustic engine

The paper presents a new numerical solution as a method for the thermodynamic cycle of a thermoacoustic engine estimation. A mathematical solution for calculating the gas averaged velocity was developed. The proposed method uses acoustic impedance of the engine's thermal core and the dynamic pressure distribution and enables to calculate gas averaged velocity and prower output. The results of power output and thermal efficiency obtained from the numerical solution and experiments performed for the tested traveling-wave engine and presented in this paper. Relative deviation between theoretical and experimental values of thermal efficiency was 10.7%. This study provides a useful approach for the calculation of the produced power of thermoacoustic engines and can be useful in designing of cycle where the power maximization is crucial.