A numerical simulation is carried out to investigate the effect of the Helmholtz resonator capacity on the Hartmann whistle operating at high values of the nozzle pressure ratio using the turbulence model. The results of the present numerical simulations are compared to experimental data. The simulation results show that the frequency and amplitude of the Hartmann whistle with the Helmholtz resonator are obviously lower as compared to the conventional Hartmann whistle. Moreover, the Mach number contours and streamlines indicate that the Helmholtz resonator does not affect the shock-cell structure between the nozzle and the cavity, and the Hartmann whistle with the Helmholtz resonator has a. jet regurgitant mode that is different from the Hartmann whistle with a. straight resonator. The diameter of the Helmholtz resonator is an important factor affecting the fundamental frequency.

中文翻译：

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亥姆霍兹谐振器对高喷嘴压力比下运行的哈特曼哨声的影响

进行数值模拟以使用湍流模型研究亥姆霍兹谐振器容量对在高喷嘴压力比值下运行的哈特曼哨声的影响。将当前数值模拟的结果与实验数据进行比较。仿真结果表明，与传统的哈特曼哨子相比，带有亥姆霍兹谐振器的哈特曼哨子的频率和幅度明显降低。此外，马赫数等高线和流线表明亥姆霍兹谐振器不影响喷嘴和腔体之间的激波室结构，而亥姆霍兹谐振器的哈特曼哨子有一个。喷射反流模式与哈特曼哨子不同。直谐振器。