Hydrodynamic cavitation through a bio-inspired fast-closing plunger mechanism: experiments and simulations
Hydrodynamic cavitation through a bio-inspired fast-closing plunger mechanism: experiments and simulations
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DOI：
10.1088/1748-3190/ac6920
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发表时间：
2022-07-01
影响因子：
3.4
通讯作者：
Chavez, O.
中科院分区：
文献类型：
--
作者：
Godinez, F. A.;Guzman, J. E., V;Chavez, O.
本文报道了仿生弹簧柱塞内、外流场演化的实验和数值结果。实验证据强调了装置内外发生的过程之间动态耦合的本质。两种主要结构决定了外部流场的性质：一种是强射流，其次是旋涡环。在腔室和文丘里管中同时产生复杂的空化结构。我们发现瑞利-普莱塞特模型可以很好地描述空化循环，因此，我们可以从速度波动的角度来描述这两个场的耦合。所有主要参数，以及在崩溃过程中释放到流体的能量，都被发现与先前已知的类似大小的孤立气泡的实验结果在同一个数量级内。
Experimental and numerical results are reported for the internal and external flow fields evolving in a bio-inspired snapping plunger. The experimental evidence underlines the nature of the dynamic-coupling between the processes taking place inside and outside the device. Two main structures dictate the properties of the external flow field: a strong jet which is followed by a vortex ring. Internally, complex patterns of cavitating structures are simultaneously produced in the chamber and the venturi-like conduit. We find the cavitation cycle to be suitably described by the Rayleigh-Plesset model and, thus, proceed to characterize the coupling of both fields in terms of the fluctuations of the velocity. All main parameters, as well as the energy released to the fluid during the collapse, are found to be within the same order-of-magnitude of previously known experimental results for isolated bubbles of comparable size.