A kind of novel suspended nano thin films that exhibit excellent thermoacoustic effects is introduced as a promising candidate and a new approach for acoustic wave generation without mechanical vibration. Although several analytical models have been established in the past to determine thermoacoustic fields and to aid design optimization, there still show many limitations. In particular, those analyses in the past are mostly only available for one-dimensional problems. In this paper, a new numerical approach based on the boundary element method (BEM) is developed for predicting acoustic fields excited from a suspended thermoacoustic (TA) nano thin film with an arbitrary three-dimensional configuration. To substantiate the numerical model, experimental studies on the thermoacoustic emission of carbon nanotube (CNT) thin films are performed to verify the proposed method and excellent agreement is observed. By using the numerical approach, the accuracy and applicability of two recently developed analytical models for suspended CNT thin films are evaluated and discussed in detail. Furthermore, the influence of irregular deformation of CNT thin films on the acoustic field is investigated.

一种具有优异的热声效果的新型悬浮纳米薄膜被引入作为一种有希望的候选物，并且是一种无需机械振动即可产生声波的新方法。尽管过去已经建立了几种分析模型来确定热声场并有助于设计优化，但仍然存在许多局限性。特别是，过去的那些分析大多数仅适用于一维问题。在本文中，基于边界元方法（BEM）的一种新的数值方法被开发来预测从具有任意三维配置的悬浮热声（TA）纳米薄膜激发的声场。为了证实数值模型，对碳纳米管（CNT）薄膜的热声发射进行了实验研究，以验证所提出的方法并观察到极好的一致性。通过使用数值方法，评估和详细讨论了两种最新开发的悬浮CNT薄膜分析模型的准确性和适用性。此外，研究了碳纳米管薄膜不规则变形对声场的影响。