In many cavitating liquid flows, when the number and concentration of the bubbles exceeds some critical level, the flow becomes unsteady and large clouds of cavitating bubbles are periodically formed and then collapse when convected into regions of higher pressure. This phenomenon is known as cloud cavitation and when it occurs it is almost always associated with a substantial increase in the c...

Nuclear reactor coolant pump as one of the most critical equipment is only rotating in first loop system nuclear power plant. Due to asymmetric structure body, especially existence outlet segment lead a certain radial force, magnitude force directly affects work stability pump. The could under those transient complex conditions an important index its performance. To study cavitation characteris...

Tip vortex cavitation is one of the most classical themes in fluid mechanics. Although many experimental and theoretical studies have been performed, unsolved problems still remain. In particular, trailing vortices at tip hydrofoil directly affects hydrodynamic acoustic performance submerged objects such as marine propeller, rudder various foil-shaped appendages ship. this study, results from m...

Since the birth of the first prototype of the modern reaction turbine, cavitation as conjectured by Euler in 1754 always presents as a challenge. Following his theory, the evolution of modern reaction (Francis and Kaplan) turbines has been completed by adding the final piece of the element 'draft-tube' that enables turbines to explore water energy at efficiencies of almost 100%. However, during...

BACKGROUND AND PURPOSE Studies in patients with lacunar stroke often assess the number of lacunes. However, data on how many symptomatic lacunar infarcts cavitate into a lacune are limited. We assessed the evolution of symptomatic lacunar infarcts over 2-year follow-up. METHODS In 82 patients with first-ever lacunar stroke with a lacunar infarct in the deep brain regions (excluding the centru...

We review recent work on the use of sonoluminescence (SL) to probe spectroscopically the conditions created during cavitation, both in clouds of collapsing bubbles (multibubble sonoluminescence, (MBSL)) and in single bubble events. The effective MBSL temperature can be controlled by the vapor pressure of the liquid or the thermal conductivity of the dissolved gas over a range from ∼1600 to ∼900...