射流对簧片哨发声的影响  

The jet′s influence on the edge tone in reed whistle

作　　者：许昊[1] 吴胜举[1] 孙军涛[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2012年第5期39-42,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(11074158)

摘　　要：采用计算流体动力学软件Fluent和前处理软件Gambit,对簧片哨的主要结构进行数值模拟,分析了不同射流速度对簧片附近速度、湍流强度等参数的影响.实验中用带通滤波器、测量放大器、水听器等实验仪器对声信号进行采集、分析.结果表明:射流速度和湍动能呈现随机脉动信号的典型特征,簧片哨发声频率的范围较广.由于射流中包含多种频率成分,从而激发簧片的振动产生了多种频率的声信号.The fluid dynamics software is used to analysis the flow velocity and turbulent intension with different jet velocity.The experimental acoustic signal is collected and analyzed by hydrophone and other instruments.The results show that the speed and turbulent kinetic energy of the jet contain the typical characteristics of the random pulse signal.The reed whistle has a wide frequencies of the acoustic signal since the jet contains a variety of frequency components,which excites the vibration of the reed and produces multi-frequency acoustic signals.

关 键 词：簧片哨 射流 数值计算 

分 类 号：O427[理学—声学]