STUDIES ON SINGLE AND TWIN PRIME MOVER TRAVELLING WAVE THERMOACOUSTIC SYSTEMS

Experimental studies of a thermoacoustic Stirling prime mover and its application to a cooler

An acoustic field spontaneously induced in a thermoacoustic prime mover consisting of a looped tube and resonator is determined through simultaneously measurements of pressure P and velocity U. A thermal efficiency of the thermoacoustic prime mover of this type has been reported to reach 30%. The measurements of the acoustic field in the present system revealed that a phase lead of U relative t...

Department of Prime Mover Engineering

Technological innovations in the field of prime movers have recently made a rapid progress as represented in cars and engines. In the Department of Prime Mover Engineering, research, design and manufacture are carried out with respect to lean burn engine, alternative fuel engine, electric vehicles such as hybrid cars, linear motor cars by use of magnetic levitation, and energy-saving solar cars...

Construction and Performance Characterization of the Looped-Tube Travelling-Wave Thermoacoustic Engine with Ceramic Regenerator

In a travelling wave thermoacoustic device, the regenerator sandwiched between a pair of (hot and cold) heat exchangers constitutes the so-called thermoacoustic core, where the thermoacoustic energy conversion from heat to acoustic power takes place. The temperature gradient along the regenerator caused by the two heat exchangers excites and maintains the acoustic wave in the resonator. The dev...

Experimental Studies of Wave Transmission through Single Perforated Sheets and Upright Perforated Wave Filters

Watching a Travelling Wave Watching a Travelling Wave

Travelling waves are a feature of many spatio-temporal series. The use of single side band filtering and the complex singular value decomposition to isolate such waves is described. As with other applications of the singular value decomposition, such as principal components, the results can be difficult to interpret. In the case of travelling waves, however, a dynamic graphical display using co...