Results 41 to 50 of about 271 (131)
Mid-Profile Design and Numerical Simulation for Supercavitating Vehicle
, 2011 Based on elliptic curve equation and G.V.Logvinovich cavity geometrical equation, the mid-profile of supercavitating vehicle was researched. The author uses Navier-Stokes equation and k-ε turbulence equation to simulate the designed geometry shape ...
Yu Tian Li, Yu Wen Zhang
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International Journal of Naval Architecture and Ocean Engineering, 2011 The supercavitating vehicle is an underwater vehicle that is surrounded almost completely by a supercavity to reduce hydrodynamic drag substantially.
Wanil Byun +6 more
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水下无人系统学报, 2023 High-speed vehicles launched by surface or aerial platforms break the speed limit of traditional underwater weapons with the help of supercavity drag reduction technology and can effectively intercept and attack potential underwater threats with the ...
Cong WANG, Hai-yu XU, Jia-xing LU
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Supercavitating Vehicle LSSVM Multiple Intelligent Control
, 2011 According to the conditions of supercavitating vehicle stable control problems, the massive uncertain factors caused by reactions between the vehicle and cavity, and the control system real-time request, the paper presents a supercavitating vehicle ...
Xiao Qiang Qi, Jia Song
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A dynamic testbed for supercavitating vehicle control
Journal of Physics: Conference Series, 2015 Supercavitating vehicles are capable of achieving unprecedented speeds due to the presence of a large gas cavity surrounding their bodies. The control design and validation of these vehicles is challenging because planing forces, oscillations, and instability arise when the vehicle pierces the supercavity.
David Escobar +2 more
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Theoretical aspects of high-speed supercavitation vehicle control [PDF]
2006 American Control Conference, 2006 A control system based on feedback linearization is developed for a high-speed supercavitating underwater vehicle. The supercavitation bubble surrounding the body leads to reduced drag but is also responsible for the undesired switched, nonlinear and delay dependent behavior caused by the phenomena known as planing. The theoretical contributions of the
Bálint Vanek, József Bokor, Gary Balas
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A Numerical Investigation of Supercavitation Vehicle’s Hydrodynamic Noise
Journal of Marine Science and Engineering, 2023 This paper presents the simulation results of the acoustic field around an underwater supercavitation vehicle under various operating conditions and analyzes the cavitation phenomenon and the hydrodynamic noise spectrum. Regarding the ventilated cavitation phenomenon, the simulation shows that low vehicle speed can reduce the threshold of the ...
Jiacheng Ye +3 more
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Mathematical Problems in Engineering, Volume 2016, Issue 1, 2016., 2016 A fixed‐length Boundary Element Method (BEM) is used to investigate the super‐ and partial cavitating flows around various axisymmetric bodies using simple and reentrant jet models at the closure zone of cavity. Also, a simple algorithm is proposed to model the quasi‐3D cavitating flows over elliptical‐head bodies using the axisymmetric method.
M. Nouroozi +3 more
wiley +1 more source
Longitudinal Motion Control of a High-Speed Supercavitation Vehicle [PDF]
Journal of Vibration and Control, 2007 This article focuses on theoretical developments in modeling and control of High-Speed Supercavitating Vehicles (HSSV). A simplified model of longitudinal dynamics is developed for control, and a dynamic inversion based inner-loop control technique is proposed to handle the switched, time-delay dependent behavior of the vehicle.
Arndt, Roger E.A. +3 more
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Fastest Fish Shapes and Optimal Supercavitating and Hypersonic Bodies of Revolution
Innovative Biosystems and Bioengineering, 2020 Background. The best swimmers have a streamlined shape that provides a flow pattern without boundary layer separation and delays the laminar-to-turbulent transition. Their shape itself could be the reason of small drag and high locomotion velocity.
Igor Nesteruk
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