| 张诣强,李双,范学良,李成,唐金龙.石墨烯薄膜热声性能的三维数值计算与测试[J].声学技术,2022,41(2):160~166 |
| 石墨烯薄膜热声性能的三维数值计算与测试 |
| Three-dimensional numerical calculation and measurement of thermoacoustic properties of graphene films |
| 投稿时间：2020-12-01 修订日期：2021-01-23 |
| DOI：10.16300/j.cnki.1000-3630.2022.02.002 |
| 中文关键词: 石墨烯薄膜 声扩散 热声效应 三维建模 |
| 英文关键词: graphene film acoustic diffusion thermoacoustic effect three-dimensional modeling |
| 基金项目:国家自然基金面上项目（51875374，11972240）、广西密码学与信息安全重点实验室研究课题（GCIS201905）资助项目。 |
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| 中文摘要: |
| 对石墨烯薄膜进行电-热-声耦合的三维建模计算，并将计算结果与实验测试值进行对比分析。首先建立了通电石墨烯薄膜焦耳热的三维模型，计算出石墨烯薄膜表面的温度振荡和稳态温度分布；在此基础上，建立了热黏性声学和压力声学耦合的声扩散模型，计算出空间中声压的分布；分析了基底和空气参数对石墨烯薄膜发声的影响；最后对通电石墨烯薄膜进行温度测试和声压测试。结果表明：三维模型数值计算的温度分布与测试结果吻合良好，数值计算的声压值比一维近似解析解更接近实验值，验证了数值计算方法的有效性。三维模型的数值计算方法在复杂边界条件下分析薄膜的声学性能更具优势。 |
| 英文摘要: |
| The three-dimensional modeling calculation of electric thermal acoustic coupling of graphene film is carried out, and the calculation results are compared with experimental data. Firstly, a three-dimensional Joule heat model of graphene film is established to calculate the temperature oscillation and steady-state temperature distribution of graphene film. On this basis, the acoustic diffusion model combining viscous acoustics and pressure acoustics is established, and the distribution of sound pressure in space is calculated. Then the effects of substrate and air parameters on the sound emission of graphene films are analyzed. Finally, the temperature and sound pressure of the graphene films are measured. The results show that: The temperature distribution calculated by the three-dimensional model agrees well with the measured temperature distribution. The numerical results are closer to the experimental values than the one-dimensional approximate analytical solution, which verifies the effectiveness of the numerical method. The numerical method of three-dimensional model has more advantages in analyzing the acoustic performance of thin films in complex boundary conditions. |
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