Abstract：Sinusoidal pressure is a typical standard signal of periodic dynamic pressure, while the sinusoidal pressure generator is the key to generate sinusoidal pressure signal. A rotating disk type of sinusoidal pressure generator has been carried out for example, to numerically simulate three-dimensional transient flow field through the dynamic mesh technique, the Reynolds-averaged Navier-Stokes equation and the Spalart Allmaras turbulence model, in order to investigate the effect of different cavity size and working frequency. The results show that, firstly in case the working frequency is constant, the dynamic amplitude ratio and the harmonic distortion degree decrease with the increase of cavity width, while the mean pressure increases. Secondly in case the cavity width is constant, as the working frequency increases, the dynamic amplitude ratio decreases, the mean stress increases, meanwhile the harmonic distortion degree decreases at first and then increases. The simulation based on dynamic mesh technique can effectively predict the various structures effects in sinusoidal pressure study.
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2020, Vol. 41 
