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Keywords: cavitation
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Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-471
... ABSTRACT Based on compressible multiphase flow, isentropic cavitation flow, and plastic shock wave theory, this paper established a theoretical model for dynamic numerical analysis of sandwich plate-water-plate structure impact with elastic support, drew the flow field pressure field image...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-470
... submarines. KEY WORDS: Water-backed freestanding plate; elastically supported water-backed plate; two-layer water-separated plate; underwater explosion; Eulerian compressible fluid model; cavitation. INTRODUCTION During underwater explosion, a highly compressed explosion gas generates strong discontinuous...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-594
... ABSTRACT This paper presents a control method for adjusting propeller rotation speed to reduce cavitation observed on the propeller suction side, attributed to a decrease in flow velocity in the wake field. The primary goal is to decrease the cavity volume while concurrently preventing...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-595
... ABSTRACT The purpose of the study is to discuss the air entrainment effect of pump impeller operation under different water depths. During pump operation, the rapid change in pressure due to blade rotation causes bubble formation in the liquid, known as cavitation. When cavitation occurs...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-598
... ABSTRACT Cavitation is a complex hydrodynamic phase transition phenomenon that occurs in the low pressure region of liquid interior. The interface between liquid and vapor is fuzzy, and requires high mesh resolution. The occurrence of cavitation will worsen the hydrodynamic performance...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-597
... ABSTRACT The interaction between multi-cavitation dynamics is a common phenomenon of interest in natural and industrial applications, such as hydraulic engineering, medical fields and military fields. The non-spherical oscillating bubble and air bubble shapes, various kinds of bubble jetting...
Proceedings Papers
Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-599
... ABSTRACT This paper takes the push-type duct azimuth propulsor, considering the maximum speed condition, adopts the SST k-ω model in the RANS method with Schnerr-Sauer cavitation model to investigate the numerical simulation results of cavitation and fluctuating pressure performance. Compared...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-314
... ABSTRACT The fluid-structure interaction (FSI) effect of a two-dimensional rudder in the cavitating flow is numerically calculated by using a two-way FSI method, with Reynolds-Averaged Navier-Stokes (RANS) method for the solution of the fluid flow field and finite element method (FEM...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-547
... changes. Using this controlled geometry generation various tip rake designs are evaluated for its performance in open water, propulsion, cavitation and pressure pulse behaviour. Each parameter defining the tip is varied in a systematic manner and its effects are evaluated using RANS based analysis...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-585
... ABSTRACT Super cavitating propellers design takes advantage of the formation of large cavities to increase flow velocity by reducing drag. Inter-blade flow of such a propeller is investigated experimentally via Laser Doppler Velocimetry and high-speed visualizations. Mean flow and fluctuations...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-588
... ABSTRACT In this paper image-processing techniques for the study of cavitation types associated with erosion of marine propellers are presented. Blade root cavitation erosion was documented on three model-scale controllable pitch propellers using a combination of soft-paint techniques and high...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-587
.... Analysis and practice show that in the outflow of the high-pressure area, a low-pressure area is created because of the inertial effect, which may cause cavitation bubbles in the fluid. This paper explains the mechanism of generating cavitation by an opened hole on ship bottom, and proposes methods...
Proceedings Papers
Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-590
...Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-80-7; ISSN 1098-6189 www.isope.org Unsteady Cavitation and Noise...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-499
... passenger transportation cavitation inception number cavitation number marine transportation drag coefficient hydrofoil tip vortex cavitation clearance cavitation inception hydrofoil cavitation inception experimental study vortice cavitation vortex cavitation tip clearance...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-493
... ABSTRACT Cavitation can be classified as gasification cavitation, vaporization cavitation and quasi cavitation. Cavitation produced by propeller can be further divided into vortex cavitation, vesicular cavitation, sheet cavitation and cloud cavitation. Vaporization cavitation phenomenon...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-016
... ABSTRACT Aiming at the impeller of trailing suction dredger, on the premise of the same impeller dimensions, three kinds of twisted blades with inlet edge shape were designed. The model pump was made according to the proportion of 1:2. The external characteristics and cavitation performance...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-070
... social responsibility pitch angle cloud cavitation cavitation inception sustainable development cavitation occur turbine blade tidal speed tip cavitation sustainability ocean energy coefficient aerodyn rotor speed cavitation turbine blade section different pitch angle tidal...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-494
... propeller hull noise cavitation channel sheet cavitation vortex cavitation synchronization test test section noise signal tip vortex cavitation cavitation pressure fluctuation propeller cavitation high-speed video hydrophone cavitation behavior ABSTRACT In order to obtain...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-497
... ABSTRACT Underwater noise (URN) is the focus of academic research, and cavitation is an important source of underwater noise. This paper takes NACA66 (mod) two-dimensional hydrofoil as the research object, and uses the open source software OpenFOAM to simulate the sheet cavitation and sound...
Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-498
... ABSTRACT The tip vortex induced cavitation affects the performance of the thrusters and causes noise radiation and vibration. Thus, it is desirable to know how to predict and control the tip vortex cavitation (TVC) and understand its mechanism, which a full understanding has not yet been...
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