点击次数：

论文类型：期刊论文

发表时间：2019-03-05

发表刊物：APPLIED THERMAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：150

页面范围：143-149

ISSN号：1359-4311

关键字：Analytical solution; Carbon nanotube thin film; Multi-layer; Near-field and far-field; Thermoacoustic

摘要：A new model for a multi-layer thermoacoustic transducer that takes full advantage of the excellent the thermoacoustic characteristics of carbon nanotube (CNT) thin film is developed. Analytical exact solutions of acoustic pressure distribution for both near and far fields are presented with engineering interpretation. By assuming acoustically transparent stacking layers and a total thickness less than a tenth of the sound wavelength, the acoustic pressure field relations between parallel layers are established that subsequently yield the sound pressure for the overall stacking films. A comparison between theoretical prediction and experiment for single-layer and multi-layer CNT thin films is presented and excellent agreement is reported. Key influencing factors including the total layer number, and the spacing between separated films and gas medium on the sound pressures level (SPL) are investigated and discussed in detail. Some design criteria that increases the SPL of the multi-layer CNT thin film transducer are also established.