Four-stage loop-type cascade traveling-wave thermoacoustic engine

摘要

We designed and built a prototype of a loop-type cascade traveling-wave thermoacoustic engine with four regenerators. The objective with this prototype engine was to achieve both high acoustic impedance at the regenerator position and a traveling-wave field in ducts, and to amplify the acoustic power by a factor equal to the number of regenerators. To achieve this objective, we enlarged the regenerator cross-sectional area and incremented the duct diameter. We measured and analyzed the acoustic field and verified that its characteristics met the objectives. (C) 2016 Elsevier Ltd. All rights reserved.