华中科技大学学报（自然科学版）2024，Vol.52Issue(1)：14-19,6.DOI:10.13245/j.hust.240421
谐振管对开口式热声发生器声学性能的影响研究
Effect of resonator on the acoustic performance of an open-air traveling wave thermoacoustic generator
摘要
Abstract
An open-air traveling wave thermoacoustic generator was theoretically modeled by the transfer matrix method and the nonlinear dissipation model of the open end.The relationship among the real part of the impedance of the open end,the volume flow rate at the opening and the pressure loss coefficient affected by the geometry of the open end were obtained.The acoustic characteristic parameters of resonant frequency,internal pressure amplitude and sound pressure level at 1 m far away from the open end were theoretically analyzed.Experiments were carried out by using different resonators with different diameters and cone tubes with different angles.The influence of the length and diameter of the resonator on the frequency of the system was discussed.The results showed that the model in this paper can reflect the influence of the diameter and length of the resonant tube on the frequency,and the calculation error is less than 5％.The cone tube at the open end can reduce the energy loss during suction,and then significantly increase the pressure inside the device.When the cone tube is 40° at the opening and the diameter and length of the resonator is 46 mm and 730 mm,respectively,the sound pressure level at 1 m far away can reach 110.2 dB.关键词
开口式行波热声发生器/谐振管/谐振频率/声压级/压力损失系数Key words
open-air traveling wave thermoacoustic generator/resonator/resonant frequency/sound pressure level/pressure loss coefficient分类
通用工业技术引用本文复制引用
吴殿伟,谢秀娟,杨少柒..谐振管对开口式热声发生器声学性能的影响研究[J].华中科技大学学报（自然科学版）,2024,52(1):14-19,6.基金项目
国家重点研发计划基金资助项目(2016YFC0800306). （2016YFC0800306）
