Study on Cavitation Damage Characteristics around a Hollow-Jet Valve
スポンサーリンク
概要
- 論文の詳細を見る
In this paper, to make clear the mechanism of cavitation damage around a hollow-jet valve, cavitation damage test was conducted in a hollow-jet model valve. The eroded surfaces of specimens were observed by Scanning Electron Microscope (SEM) at different times of the test. Cavitation aspects were also observed photographically by a high-speed camera. It was found that the damage occurs in cavitating flows around a hollow-jet valve with two patterns. One is characterized by a big plastic crater, which seems to be generated by one blow event of cavitating vortex collapse near a specimen surface. Another is due to a small brittle irregular pit formed by the cumulative effects of many weaker blows. The former is the main cause to lead serious damage. The high-speed photographic observations of the cavitation aspects showed that more cavitating vortices in middle cavitation number state occur than these in other states. The damage tests also illustrated that the middle state is the most dangerous for cavitation damage around a hollw-jet valve.
- 一般社団法人日本機械学会の論文
- 1999-11-15
著者
-
IKOHAGI Toshiaki
Institute of Fluid Science, Tohoku University
-
Ikohagi Toshiaki
Institute Of Fluid Science Tohoku University
-
LIU Shujun
Institute of Fluid Science, Tohoku University
-
Liu Shujun
Institute Of Fluid Science Tohoku University
-
Shintani Masayuki
Sumiyoshi Factory Kurimoto Ltd.
-
WANG Guoyu
Graduate School of Tohoku University
関連論文
- Numerical Prediction of Cavitation Erosion Intensity in Cavitating Flows around a Clark Y 11.7% Hydrofoil
- Experimental Investigation of Cavitation in an Axisymmetric Rectangular Groove
- Jet Structure Analyses on High-Speed Submerged Water Jets through Cavitation Noises
- A Study on the Surface Shape of Fish Scales(Reviewed Papers Accepted for Publication in this Special Issue)(Special Issue on Bioengineering)
- A Study on the Wing Structure and Flapping Behavior of a Dragonfly
- Experimental Study of Cavity Flow Behavior on a 2-D Hydrofoil
- Foreword
- A Finite-Difference Scheme for Two-Dimensional Incompressible Turbulent Flows Using Curvilinear Coordinates
- An Unsteady Implicit SMAC Scheme for Two-Dimensional Incompressible Navier-Stokes Equations
- Chracteristics of Cavitation-Induced Sonoluminescence under Conditions of Cathodic Protection
- Study on Cavitation Damage Characteristics around a Hollow-Jet Valve
- Occurrence Mechanism and Oscillation Characteristics of Pulsation Phenomenon Arising in Cavitation Surge in Cascade
- Large Eddy Simulation of Unsteady Interaction between Supersonic Turbulent Boundary Layer and Shock Wave at a Compression Corner(Compressible Flow and Detonation)
- Numerical Analysis of Cavitation Instabilities and the Suppression in Cascade
- Numerical Analysis of Nonspherical Bubble Collapse Behavior and Induced Impulsive Pressure during First and Second Collapses near the Wall Boundary