加速运动中的盘腔过通风超腔的形成与发展

Olena Naumova, Volodymyr Moroz, Viktor Kochin, V. Semenenko
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引用次数: 0

摘要

该研究致力于对从静止状态到稳定速度的圆盘空腔加速运动中通风超空腔的形成和发展过程进行实验研究和计算机模拟。在乌克兰国家科学院水力学研究所的高速实验槽中进行了一系列实验,对进入空腔的空气供应率进行了不同数值的计算。实验结果表明,在水平加速运动的情况下,空腔中的空气损失始终保持部分类型,而在相同速度的稳定运动情况下,空气损失始终通过涡流管实现。在这种情况下,非稳态空腔的横截面形状在整个空腔长度上和所有加速阶段都接近圆形。为了描述这一过程,我们提出了一个修改后的数学模型,该模型基于 G.V.Logvinovich 的空腔截面膨胀独立原理。通过计算机模拟分析了浸入深度和空气供应率对加速过程中通风超空腔发展过程的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Formation and development of ventilated supercavity past the disk–cavitator in accelerated motion
The work is devoted to both the experimental studies and the computer simulation of the process of formation and development of a ventilated supercavity past the disk-cavitator in accelerated motion from the state of rest to the steady velocity. A series of experiments were carried out in the high-speed experimental tank at the Institute of Hydromechanics of the National Academy of Sciences of Ukraine for various values of the air-supply rate into the cavity. It has been established that the portion type of air-loss from the cavity is always preserved in the case of horizontal accelerated motion, while the air-loss by vortex tubes is always realized in the case of steady motion with the same velocity. In this case, shape of the cross sections of the unsteady cavity is close to circular one along the whole cavity length and at all stages of acceleration. To describe this process, a modified mathematical model is proposed that is based on the G.V.Logvinovich principle of independence of the cavity section expansion. An analysis of the influence of both the immersion depth and the air-supply rate on the process of development of a ventilated supercavity during acceleration has been performed by the way of computer simulation.
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