Research of Cavitation at High Shear Stress
Journal Title: Strojnicky casopis - Journal of Mechanical Engineering - Year 2016, Vol 66, Issue 1
Abstract
The article describes the theory of cavitation at high values of shear stress in a viscous liquid. For this purpose, a spatial model of two cylindrical shells imposed concentrically was designed. In the narrow gap between the cylinders the temperature, density and viscosity of liquid is constant. Shear stress is induced by the rotary motion of the inner cylinder, resulting in a change of velocity and pressure fields. Due to the pressure drop between the cylinders there is a precondition to the formation of cavitation bubbles at the point of the lowest static pressure. To verify the assumption was made CFD model based on simplified physical model, through which cavitation was qualitatively and quantitatively assessed. In this paper the results of the numerical solution will be presented alongside with basic form of experimental device for physical generation of cavitation at high values of shear stress.
Authors and Affiliations
Zoltán Csuka, Róbert Olšiak and Zoltán Fuszko
Keywords
Related Articles
- EP ID EP43878
- DOI https://doi.org/10.1515/scjme-2016-0006
- Views 255
- Downloads 0
Effect of Additives on Static Settled Concentration, pH and Viscosity of Bottom Ash-Water Suspension
In the present work, static settled concentration, pH and viscosity of bottom ash is studied with addition of additive. Sodium sulfate is used as an additive with proportion of 0.2, 0.4 and 0.6% (by weight). The solid...
All-Pass Filters in the Systems of Active Vibration Control of Weakly-Damped Systems
The problem of active vibration control of weakly damped mechanical structures is potentially unstable modes of vibrations due to the positive feedback for some vibration modes. The paper will discuss the change of pos...
The Finite Element Analysis of High Precision Positioning System
The paper deals with design and computation of precise positioning mechanism. The aim of mechanism is to transfer applied load without any change of position of parts in question. The stabilization of position is assur...
OPTIMIZATION OF WELDING PROCESS USING A GENETIC ALGORITHM
Welding is a complex technological process in which local heating takes place up to the melting point of the connecting and the additional material. Phase and crystallization processes are a strong non-linear function...
Modeling of Ice-Shedding from ACSR Power Line
In this contribution, the analysis of ice-shedding from Aluminium Conductor Steel Reinforced (ACSR) power lines is presented. The impact of the icing position on the overhead power lines, the resulting jump height, and...