摘要
为进一步改善哈特曼发声器的声学特性,提高发声效率提供理论依据。根据计算流体力学和传热学基本理论,利用FLUENT软件,采用有限体积法对Hartmann哨的流场进行数值模拟计算,并对计算结果进行分析.得到其速度场和压强场分布,不同的喷嘴直径和入口压强对Hartmann哨的流场有不同的影响。在相同的入口压强下,喷嘴直径较大的Hartmann哨产生的声压级较高;保持喷嘴直径不变,声压级随入口压强的增加而增大。
In order to provide theory evidence for further improving the acoustic properties,enhancing vocal efficiency of Hartmann whistle.According to Computational Fluid Dynamics and heat transfer theory,this article calculated numerical simulation using FLUENT software and adopted Finite Volume Method for numerical simulation computation of fluid field of the Hartmann whistles and the calculated results are analyzed.The distributions of velocity and pressure are got,Different nozzle diameter and entrance pressure made different influences to fluid field of the Hartmann whistle.Under the same entrance pressure,the bigger the nozzle diameter of the Hartmann whistle is,the higher sound pressure level it can generate.Remaining nozzle diameter unchanged,the sound pressure will be increased while the increasing of the entrance pressure.
出处
《西安邮电大学学报》
2011年第S2期44-46,共3页
Journal of Xi’an University of Posts and Telecommunications
