Cavitation Passive Control on Immersed Bodies

这份报纸介绍通过称为人工的成穴水泡生成器(ACG ) 的一个被动成穴控制器在一只水翼船附近控制成穴的一个新想法。周期也就是，在沉浸的身体附近处理水泡的生长和内爆，是为说的身体的破坏和侵蚀的主要原因。这份报纸试图创造成穴水泡在到达一种不变的状况并且阻止周期的过程的出现的一个条件。为这个目的，特别地， ACG 被放在沉浸的身体的表面上一只 2D 水翼船的吸表面。模拟基于与联系的一个简单算法与一个含蓄的有限体积计划被执行多相并且成穴模型。与狂暴的粘性的修正装备的修改的 k- RNG 骚乱模型被使用克服骚乱闭合问题。在与一个低压的再通行区域在 ACG 后面并且人工地被生产的 ACG 表演装备的水翼船上的水流动的数字模拟产生静止成穴水泡。这 ACG 的地点，形状，和尺寸是在创造合适的控制的关键参数。结果证明成穴水泡与设计得好的 ACG 被控制很好。

This paper introduces a new idea of controlling cavitation around a hydrofoil through a passive cavitation controller called artificial cavitation bubble generator （ACG）. Cyclic processes, namely, growth and implosion of bubbles around an immersed body, are the main reasons for the destruction and erosion of the said body. This paper aims to create a condition in which the cavitation bubbles reach a steady-state situation and prevent the occurrence of the cyclic processes. For this purpose, the ACG is placed on the surface of an immersed body, in particular, the suction surface of a 2D hydrofoil. A simulation was performed with an implicit finite volume scheme based on a SIMPLE algorithm associated with the multiphase and cavitation model. The modified k-ε RNG turbulence model equipped with a modification of the turbulent viscosity was applied to overcome the turbulence closure problem. Numerical simulation of water flow over the hydrofoil equipped with the ACG shows that a low-pressure recirculation area is produced behind the ACG and artificially generates stationary cavitation bubbles. The location, shape, and size of this ACG are the crucial parameters in creating a proper control. Results show that the cavitation bubble is controlled well with a well-designed ACG.