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Numerical study on supercavitating flow in free stream with regular waves
International Journal of Naval Architecture and Ocean Engineering ( IF 2.2 ) Pub Date : 2020-10-19 , DOI: 10.1016/j.ijnaoe.2020.08.004
Da Li , Xujian Lyu

In this study, the supercavitating flow of a high-velocity moving body near air-water surface is calculated and analyzed based on a commercial CFD software ANSYS Fluent. The effect of regular wave parameters including both wave height and wavelength on the cavitating flow and force characteristics of a body at different velocities is investigated. It is found that the cavity shape, lift coefficient and drag coefficient of the body vary periodically with wave fluctuation, and the variation period is basically consistent with wave period. When the wavelength is much greater than the cavity length, the effect of wave on supercavitation is the alternating effect of axial compression and radial compression. However, when the wavelength varies around the cavity length, the cavity often crosses two adjacent troughs and is compressed periodically by the two wave troughs. With the variation of wavelength, the average area of cavity shows a different trend with the change of wave height.



中文翻译:

规则波自由流中超空化流的数值研究

在这项研究中,基于商用CFD软件ANSYS Fluent,计算并分析了靠近空气-水表面的高速运动体的超空化流。研究了包括波高和波长在内的规则波参数对物体在不同速度下的空化流和力特性的影响。研究发现,物体的腔体形状,升力系数和阻力系数随波浪的波动而周期性变化,其变化周期与波动周期基本一致。当波长远大于腔体长度时,波对超空化的影响是轴向压缩和径向压缩的交替影响。但是,当波长在腔长附近变化时,空腔经常穿过两个相邻的槽,并被两个波谷周期性地压缩。随着波长的变化,腔的平均面积随波高的变化呈现出不同的趋势。

更新日期:2020-10-30
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