Thermoacoustic effect, which converts thermal energy to acoustic energy and vice versa, has been studied and used to generate mechanical power or to produce cooling of different scales and configurations.2,3 Thermoacoustic engines and refrigerators are known for their simple construction and use of very few moving parts and environmentally-friendly inert gases. This paper describes the numerical and experimental study of the standing-wave type miniature thermoacoustic coolers of about one inch long. The exploration of the downscaled thermoacoustic coolers is targeted for lowcapacity cooling. The numerical study includes using a commercial software, Fluent™ and DELTAE.1 The maximum achieved temperature differential is 10°C using an inhouse MEMS stack material. The development of acoustic drivers and a new resonator geometry were also attempted. The coolers were operated under 1 atm air at around 4 and 10 kHz, where the acoustic resonances locate. The achieved maximum pressure drive ratio, pi/pm, was slightly larger than 5% in the straight resonator. A pressurized version of the cooler has been under development.
|State||Published - 2002|
|Event||40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States|
Duration: 14 Jan 2002 → 17 Jan 2002
|Conference||40th AIAA Aerospace Sciences Meeting and Exhibit 2002|
|Period||14/01/02 → 17/01/02|