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Cavitation studies on axi-symmetric underwater body with pumpjet propulsor in cavitation tunnel [PDF]
International Journal of Naval Architecture and Ocean Engineering, 2010 A pumpjet propulsor (PJP) was designed for an underwater body (UWB) with axi-symmetric configuration. Its performance was predicted through CFD study and models were manufactured.
K Ramji
exaly +7 more sources
International Journal of Naval Architecture and Ocean Engineering, 2015 For Super-Cavitating Underwater Vehicles (SCUV), the numerical analyses and experiments in a large cavitation tunnel are carried out at relatively large Reynolds numbers.
Jung-Kyu Choi +2 more
exaly +6 more sources
Improvement of Rudder Cavitation Performance Using Rudder Inflow Measurements in Large Cavitation Tunnel [PDF]
Journal of Marine Science and Engineering, 2022 One of the important things in a ship’s rudder design is the incidence angle of the rudder inflow to improve rudder cavitation performance. In the present study, the rudder inflow is measured by a 3-D LDV (laser Doppler velocimetry) system in a large ...
Bu-Geun Paik +2 more
exaly +4 more sources
Numerical study on the evolution of cavitating flow and collapse-induced erosion characteristics in high-speed hydraulic tunnel [PDF]
Ultrasonics SonochemistryWhile hydrodynamic cavitation and the associated erosion during cavity collapse have received significant attention, existing research has predominantly focused on small-scale geometries like Venturi tubes.
Bin Liu +3 more
doaj +2 more sources
A feature extraction method for hydrofoil attached cavitation based on deep learning image semantic segmentation algorithm [PDF]
Scientific ReportsCavitation is a technical challenge for high-speed underwater vehicles, such as nuclear submarines and underwater robots, et al. The cavitation phenomena of hydrofoils are typically studied through water tunnel experiments or numerical simulations, which
Yingyuan Liu, Yizhi Wang, Kang An
doaj +2 more sources
International Journal of Naval Architecture and Ocean Engineering, 2022 In this study, a numerical investigation of the flow quality and total head loss of a large cavitation tunnel is conducted. Excluding the impeller, the entire tunnel is modeled, and calculations are conducted for the test section's maximum speed of 15 m ...
Jung-Kyu Choi +2 more
exaly +3 more sources
Optimization of hydrofoil leading-edge geometry for delaying incipient cavitation using a CFD–GA approach [PDF]
Science ProgressCavitation is a common phenomenon in hydraulic machinery, which brings negative impacts such as noise, vibration, performance drop and material damage into hydraulic turbomachinery.
Xinyi Xie, Ran Tao
doaj +2 more sources
Noise Localization Method for Model Tests in a Large Cavitation Tunnel Using a Hydrophone Array
Remote Sensing, 2016 Model tests are performed in order to predict the noise level of a full ship and to control its noise signature. Localizing noise sources in the model test is therefore an important research subject along with measuring noise levels.
Cheolsoo Park +2 more
exaly +3 more sources
Journal of Fluid Science and Technology, 2022 The generated cavitation on the NACA16-012 hydrofoil suddenly disappears at a specific angle of attack, even at a low cavitation number, where cavitation normally develops. This was named the cavitation disappearance phenomenon by the authors. It has not
Koki SUGAYA +4 more
doaj +1 more source
Analysis of Bulb Turbine Hydrofoil Cavitation
Applied Sciences, 2021 The influence of a bulb runner blade hydrofoil shape on flow characteristics around the blade was studied. Experimental work was performed on a bulb turbine measuring station and a single hydrofoil in a cavitating tunnel.
Andrej Podnar +3 more
doaj +1 more source