| 阶梯复合形光声池声-流特性计算与评估 |
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| 引用本文： | 程刚,曹亚南,田兴,刘锟,陈家金.阶梯复合形光声池声-流特性计算与评估[J].光子学报,2021,50(2):192-200. |
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| 作者姓名： | 程刚 曹亚南 田兴 刘锟 陈家金 |
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| 作者单位： | 安徽理工大学 深部煤矿采动响应与灾害防控国家重点实验室,安徽 淮南 232001;中国科学院安徽光学精密机械研究所,合肥 230031 |
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| 基金项目： | 国家自然科学基金(Nos.41575030,41475023);深部煤矿采动响应与灾害防控国家重点实验室开放基金(No.SKLMRDPC19KF12)。 |
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| 摘 要： | 为了提高光声池的检测性能,提出并分析了一种阶梯复合形光声池.以传统圆柱共振型光声池为基准模型,通过对比解析与模拟计算结果,验证了所采用模拟方法的可靠性,基于模拟方法求解并获得了阶梯腔半径、阶梯腔长度和阶梯腔数量对阶梯复合形光声池声-流特性的影响规律.结果表明:减小阶梯复合形光声池中阶梯腔半径,光声信号相对增强,阶梯腔长...
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| 关 键 词： | 光声光谱 结构设计 数值模拟 优化设计 声学 流场 |
Calculation and Evaluation of Acoustic and Flow Field Characteristics of Trapezoid Compound Photoacoustic Cell |
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| Institution: | (State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan,Anhui 232001,China;Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China) |
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| Abstract: | To improve the detection performance of the photoacoustic cell,a trapezoid compound photoacoustic cell is proposed and analyzed.Taking the traditional cylindrical resonant photoacoustic cell as the reference model,the reliability of the simulation method is verified by comparing the results of analysis and simulation.Based on the simulation method,the influence of the radius,length,and the number of the stepped cavity on the acoustic field and flow field characteristics of the trapezoidal composite photoacoustic cell is calculated.The results show that reducing the stepped cavity radius of the trapezoidal compound photoacoustic cell can enhance the photoacoustic signal,and the optimal length of the stepped cavity can make the photoacoustic signal to be the strongest,and the number of the stepped cavity should be one.In terms of the flow field,the configuration characteristics of the trapezoidal composite photoacoustic cell improve the condition of gas vortex return to the cavity.If the transition to the cavity is furthering rounded or chamfered,the velocity gradient in the cavity will become more stable.Select a set of design parameters,the calculation results show that the volume of the trapezoid compound photoacoustic cell cavity is reduced to 39.7%of the corresponding cylindrical resonant photoacoustic cell,and the photoacoustic signal is increased by about 18.7%.In addition,its frequency response bandwidth is narrowed,and its quality factor is improved.The overall results show that the acoustic field and flow field characteristics of the trapezoidal composite photoacoustic cell are better than that of the corresponding cylindrical resonant photoacoustic cell.The research content can provide reference for the structural optimization and improvement of the photoacoustic spectral photoacoustic cell. |
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| Keywords: | Photoacoustic spectroscopy Structural design Numerical simulation Optimal design Acoustic Flow field |
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