Characteristics of Bubble-Collapse Pressures in a Karman-Vortex Cavity
スポンサーリンク
概要
- 論文の詳細を見る
Flow patterns and bubble-collapse pressures in a Karman-vortex cavity behind a circular cylinder are investigated for several Reynolds numbers and cavitation numbers. The time histories and intensity distributions of the pressures are respectively measured by using a pressure transducer and pressure-sensitive films. The cavitation aspects are also observed by high-speed photography. The bubbles frequently collapse at the instant when the Karman-vortex cavity separates from the cylinder or the cavity itself. High impulsive pressures with spike pulses over 60MPa occur in the separation or the vortex formation region. With a decrease in cavitation number σ, these regions are combined into one. With an increase in Reynolds number Re, however, the distributions of the impulsive pressures show the same tendency, because they have the same Strouhal number St, but the pulse count rate and magnitude of maximum local impulsive pressures increase.
- 社団法人日本機械学会の論文
- 1992-05-15
著者
-
OBA Risaburo
Institute of Fluid Science, Tohoku University
-
Oba Risaburo
Institute Of Fluid Science Tohoku University
-
MATSUDAIRA Yasuaki
Tokyo Metropolitan Institute of Technology
-
GOMI Yoshihisa
Tokyo Metropolitan Institute of Technology
関連論文
- Jet Structure Analyses on High-Speed Submerged Water Jets through Cavitation Noises
- Several Kinds Vibrations Arisen around a Typical Highspeed SupercavitatingHydrofoil with Various Nose Shapes
- Appearance of Cavitation and Cavitation-Acoustic-Pulses (Especially in Decelerated-and Accelerated-Flow)
- Singular Behavior of Erosion-Standoff-Distance-Curves for Highspeed-Water-Jets in Air
- Behavior of Cavitation Nuclei in High-Speed Submerged Water-Jet-Tests
- Marked Change in Subcavitation-Cascade Performance Resulting from a Very Slight Modification in Leading Edges
- Spatial Distribution of Cavitation-Shock-Pressure Around a Jet-Flow Gate-Valve : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical Properties
- Base-Vented Performance Simulation for Supercavitating Hydrofoils with Pseudo-Kirchhoff Noses Operating within the Subcavitating Region
- SEM Observation of the Vibratory Cavitation-Fracture Mode during the Incubation Period and the Small Roughness Effect
- Developing Stages of Ultrasonically Produced Cavitation Erosion and Corresponding Surface Roughness
- An Indirect Vibratory Method Capable of Simulating Several Cavitating States
- Several Trials in the Search for a Complete Cavitation Concept
- Flow Calculation of a Mixed-Flow Runner, Especially with Respect to a Marked Effect of the Blade Loading
- SEM Studies of Particles Produced by Cavitation Erosion
- Characteristics of Bubble-Collapse Pressures in a Karman-Vortex Cavity
- Spatial Distribution of Cavitation-Shock-Pressures around a Jet-Flow Gate-Valve
- Cavitation-Probable Bubbles Flowing Down from a Cavitating Branch Duct
- A Peculiar Behavior of Cavitation-Nuclei-Size Distributions in Sample Water Under Vibratory Erosion Tests
- Stochastic Behavior (Randomness) of Acoustic Pressure Pulses in the Near-Subcavitating Range : Fluids Engineering
- Peculiar Behavior of Disc Drag during Force Measurements for Supercavitating Hydrofoils
- Cavity Separations and Associated Impulsive Pressures around a Cavitating Circular Cylinder (1st Report, Vortex Cavitation in the Wake and Attached Cavitation)
- Peculiar Behavior of Disc Drag During Force Measurements for Super cavitating Hydrofoils
- Unsteady Behavior of Violent-Vibrations Depending upon Type of Cavitation
- Studies on Low-Erosion Butterfly Valves : Suppression of Erosive Vortex Cavitation
- High-Speed Observations of the Cavitation Cloud around a High-Speed Submerged Water Jet
- Suitable Region of High-Speed Submerged Water Jets for Cutting and Peening
- High-Speed Observations of the Vibratory Cavitation Accompanying Hard Erosion
- High-Speed Stereo-Observations of Violent Vibrations Associated with Three Types of Cavitation