The study of the interaction of bubbles with shock waves and ultrasound is sometimes termed 'acoustic cavitation'. It is of importance in many biomedical applications where sound waves are applied. The use of shock waves and ultrasound in medical treatments is appealing because of their non-invasiveness. In this review, we present a variety of acoustics-bubble interactions, with a focus on shoc...

Tip vortex cavitation is one of well known patterns of cavitation phenomenon which occurs in axial pumps. This pattern of cavitation occurs due to pressure difference between the pressure and suction sides of blades of an axial pump. Since the pressure in the pressure side of the blade is higher than the pressure in its suction side, thus a very small portion of liquid flow flows back from pres...

In addition to the vapour of the liquid, bubbles in cavitating flows usually contain also a certain amount of permanent gas that diffuses out of the liquid as they grow. This paper presents a simplified linear model for the propagation of monochromatic pressure waves in a bubbly liquid with these characteristics. Phase change effects are included in detail, while the gas is assumed to follow a ...

The present paper is devoted to the analysis of various instabilities cavitation attached a two-dimensional (2D) profile. Time resolved stereo particle image velocimetry was conducted in small-scale 2D Venturi type section, different vertical planes streamwise direction, located at varying positions depth channel. These experiments enabled obtain time evolution three components velocity field a...

Abstract The cavitation regime has a substantial influence on the damage potential, thus it to be considered in any specific investigation. For this purpose, we set up test rig at Technische Universität Darmstadt using Circular Leading Edge hydrofoil (CLE) analyse potential of sheet and cloud cavitation. Exceeding critical Reynolds number Re c , transitions from harmless aggressive High-speed r...

Cavitation is in most cases harmful and undesired phenomenon in fluid power systems. When actions for preventing cavitation are considered, it is essential to recognise the existence of cavitation and location of cavitation inception point. In fluid power components and systems cavitation can occur in various locations where the access for measuring instruments is limited. Therefore, the existe...

This study investigated the effects of seawater on cavitation noise using a water jet test, a two-dimensional wing test, and a three-dimensional wing test. A model propeller cavitation test was conducted in a cavitation tunnel using seawater, in order to determine the effects of propeller cavitation more precisely. In the cavitation tests, measured propeller performance for both cavitation nois...

The focus of this paper is the numerical simulation of the dynam~cs and acoustics of a cloud of cavitating bubbles. The prob~t~ypical prohlet~~ solved considers a finite c lo~~ t l of 1111clei that is exposed to a decrease in the ambient, pressure which carlscs the cloud to cavitate. A so l ) sc~l~~ent pressure recovery then causes the c l o ~ ~ d to collapse. This is typical of the perturbatio...

In order to avoid or predict cavitation erosion, it is necessary to know resistance of materials against to cavitation impacts. The cavitation impacts, which are larger than certain threshold level, only affect cavitation erosion of materials. In the present paper, existence of the threshold level was revealed experimentally. The threshold level of material is a new parameter to predict the cav...