The flow field and the energy transport near thermoacoustic couples are simulated using a 2D full Navier-Stokes solver. The thermoacoustic couple plate is maintained at a constant temperature; plate lengths, which are "short" and "long" compared with the particle displacement lengths of the acoustic standing waves, are tested. Also investigated are the effects of plate spacing and the amplitude...

This paper gives a simplified analytical description of spontaneous generation and finite amplitude saturation of sound in annular thermoacoustic engines, and also provides comparison with experiments. The model includes the precise description of thermoacoustic amplification of sound (induced by interaction between an heterogeneously heated stack of solid plates and resonant gas oscillations),...

Introduction In order to cancel Gedeon streaming in traveling wave thermoacoustic devices, a jet pump can be used [2, 3]. Due to its asymmetric shape an asymmetry in the minor losses during each acoustic cycle occurs that yields a time-averaged pressure drop across the jet pump. By balancing the time-averaged pressure drop across the jet pump with that which exists across the regenerator of a t...

Introduction Thermoacoustic devices operate on conversion of heat into acoustic energy and vice versa for use in heat engines or refrigerators [2]. Normally the conversion between thermal and acoustic energies is realised by oscillating gas flow. The main advantages are lack of moving mechanical parts and use of non polluting inert gases as working medium. The present efficiency levels are as h...

Refrigerator is one of the home appliance utilizing mechanical vapour compression cycle in it process. Performance of the system becomes main issue and many researches are still ongoing to evaluate and improve efficiency of the system. Therefore, this paper presents the development process of refrigerator test rig and performance analysis of a domestic refrigerator. The experiment platform whic...