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Abstract
In a view to determine the optimum performance of a thermoacoustic heat engine, the study attempts to optimize the stack in the engine. The thermoacoustic heat engine is comprised of a quarter resonator and a short random stack occupying its entire cross section sandwiched between two heat exchangers. A temperature gradient is imposed across the stack. Measurements are made of the acoustic power of the engine as a function of the stack position, width and filing factor for three different materials such as Cotton, Glass wool and Stainless steel. The experimental measurements are compared to Deltae software calculations. The random stack shows a slightly better behaviour than parallel plate stack. This study suggests that the use of the random stack in manufacturing the thermoacoustic devices would improve the performance of such devices as well as simplify their manufacturing process.