Results 21 to 30 of about 479 (201)
Experimental research of cavity geometry behind high-speed bodies in water [PDF]
EPJ Web of Conferences, 2019 At high speed launching of bodies via smoothbore throwing facility into water, a stabilization of bodies was experimentally achieved due to periodical interactions of body contour with the cavity boundaries.
Ischenko Alexander +4 more
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Experimental investigation of supercavitating flows
International Journal of Naval Architecture and Ocean Engineering, 2012 When the object is traveling in the water at tremendously high speeds, the cavity forms and grows up at a fore part of the object called cavitator, and the object is eventually enveloped by vaporized water, supercavitation.
Byoung-Kwon Ahn +3 more
doaj +2 more sources
Body parameters with application of optimal differential variation method in super cavity model [PDF]
Vietnam Journal of Mechanics, 2016 When a slender body moves very fast through water at sufficient speed the cavity phenomena is happened. In a cavity model the body’s lengths and cavitator diameter are determined by the differential variationoptimal method so that the velocity of body ...
Tran Thu Ha +2 more
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Numerical analysis for supercavitating flows around axisymmetric cavitators
International Journal of Naval Architecture and Ocean Engineering, 2013 Diffuse interface model for numerical analysis was used to compute supercavitating flows around various cavitators. The ambient pressures of 2 atm permitted cavitation studies in a range of cavitation number, σ=0.1 to 1.0 on selected conical and disk ...
Young Kyun Kwack, Sung Ho Ko
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Control of switched systems with delayed states: A direct AFSMC approach
IET Control Theory &Applications, Volume 17, Issue 1, Page 1-18, January 2023., 2023 Abstract This research focuses on controlling a class of MIMO state‐delayed nonlinear systems with switching conditions that depend on the delayed states. The key concept is to consider the dynamic changes brought by switching between sub‐systems as an uncertainty bounded by a certain polynomial of the delayed states norm.
Amir Hossein Davaie Markazi +1 more
wiley +1 more source
Journal of Sensors, Volume 2023, Issue 1, 2023., 2023 The aim of this paper is to present a novel sliding mode control scheme for the supercavitating vehicle trajectory tracking problem that subjects to external disturbances and actuator saturation with two symmetric elevators and a cavitator as actuators by analytical methods and computer simulations. Firstly, the nonlinear and highly coupled dynamic and
Guang Yang +4 more
wiley +1 more source
Bow and Stern Control Surface’s Effectiveness and Influence on Supercavity
Journal of Sensors, Volume 2021, Issue 1, 2021., 2021 The numerical model of supercavitating flow field was established based on multiphase model, cavitation model, and turbulence model. The model was employed to simulate the supercavitation flow for the supercavitating vehicle with two types of control surfaces: bow rudder and stern rudder.
Ping Wei +4 more
wiley +1 more source
A study on practical method to estimate drag of super-cavitating underwater vehicles
International Journal of Naval Architecture and Ocean Engineering, 2021 In this paper, a simple practical method to estimate the drag of Super-Cavitating Underwater Vehicles (SCUV) is proposed that can obtain the drag with only principal dimensions in an initial design stage.
Jung-Kyu Choi, Hyoung-Tae Kim
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Numerical and Experimental Study of Ventilation Effects on Ventilated Cavitating Flow [PDF]
مجله مدل سازی در مهندسی, 2017 One of the least cost methods to reduce drag on under-water projectiles is to create ventilated cavitation. So, many of researchers have focused on this subject during recent decade.
Seyed Morteza Javadpour +4 more
doaj +1 more source
水下无人系统学报, 2022 The OPENFOAM platform was used to perform three-dimensional numerical simulations of the complex flow process of supercavitating torpedoes to investigate the morphological evolution of cavitation and hydrodynamic characteristics of supercavitating ...
Teng XIAO, Bin XIE, Yan-ping DU
doaj +1 more source