Results 51 to 60 of about 479 (201)

Analysis on Multistable Motion Characteristics of Supercavitating Vehicle

Shock and Vibration, Volume 2017, Issue 1, 2017., 2017
Due to complex underwater environment, when the initial condition of launching is subjected to low external disturbance, the motion trace of a supercavitating vehicle might display many different motion states during underwater navigation. With the aim of addressing this problem, based on the dynamic map, in the present work the multistable phenomena ...
Tianhong Xiong, Yipin Lv, Wenjun Yi, Matteo Aureli   +3 more
wiley   +1 more source

Augmentation of Vortex Cavitator Performance by the Use of Co-Directional Swirl of the Flux after Vortex Chamber [PDF]

, 2019
Background: Acoustic cavitation is the creation and collapse of cavitation caverns in liquid in an acoustic field with a frequency of f = 1–3 kHz.
Alexei Ivanovich Novozhilov, Gorbunov, Boris Ivanovich, Ivanov, Evgeniy Gennadievich, Aryutov, Boris Alexandrovich, Evgeniy Gennadievich Ivanov, Boris Ivanovich Gorbunov, Boris Alexandrovich Aryutov, Novozhilov, Alexei Ivanovich, Pasin, Alexander Valentinovich, Alexander Valentinovich Pasin   +9 more
core   +1 more source

Simulation of Partial and Supercavitating Flows around Axisymmetric and Quasi‐3D Bodies by Boundary Element Method Using Simple and Reentrant Jet Models at the Closure Zone of Cavity

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, M. Pasandidehfard, M. H. Djavareshkian, Song Cen   +3 more
wiley   +1 more source

Experimental investigation of combustion hot-gas ventilated supercavitation

International Journal of Naval Architecture and Ocean Engineering, 2022
Most of experimental and numerical studies on ventilated supercavitation have been focused on injection of room temperature air. However, in this work, the effect of combustion hot-gas over 1200 K on characteristics of the supercavity was investigated ...
Van-Duyen Pham, Ji-Woo Hong, Byoung-Kwon Ahn   +2 more
doaj   +1 more source

A-harmonic equation and cavitation

Annales Fennici Mathematici, 2023
Suppose that \(f\) is a homeomorphism from the punctured unit disk \(D \setminus \{0\}\) onto the annulus \(A(r') = \{r' < |z| <1 \}\), \(r' \geq 0\), and \(f\) is quasiconformal in every \(A(r)\), \(r> 0\), but not in \(D\). If \(r' > 0\) then \(f\) has cavitation at \(0\) and no cavitation if \(r' = 0\). The singular factorization problem
Gutlyanskii, Vladimir, Martio, Olli, Ryazanov, Vladimir   +2 more
openaire   +3 more sources

Research on the Numerical Simulation of the Nonlinear Dynamics of a Supercavitating Vehicle

Shock and Vibration, Volume 2016, Issue 1, 2016., 2016
Little is known about the movement characteristics of the supercavitating vehicle navigating underwater. In this paper, based on a four‐dimensional dynamical system of this vehicle, its complicated dynamical behaviors were analyzed in detail by numerical simulation, according to the phase trajectory diagram, the bifurcation diagram, and the Lyapunov ...
Tianhong Xiong, Xianyi Li, Yipin Lv, Wenjun Yi, Dumitru I. Caruntu   +4 more
wiley   +1 more source

Investigation of Hydroxyl Radical Yield in an Impact-Jet Hydraulic Cavitator

, 2022
Hydroxyl radical (·OH) is a key component that leads to the cleavage of the glycosidic bond in the process of chitosan (CS) degradation by hydrodynamic cavitation (HC).
Dongdong Xie, Kunming Zhang, Yan Cao, Chengdu Huang, Shujun Wang, Xiangyu Zhang, Yongchun Huang   +6 more
core   +1 more source

Shape of Slender Axisymmetric Ventilated Supercavities

Journal of Computational Engineering, Volume 2014, Issue 1, 2014., 2014
The integral‐differential equation was obtained to simulate unsteady evolutions of the slender axisymmetric ventilated supercavity with the use of one‐dimensional inviscid flow of the incompressible gas in the channel between the cavity surface and the body of revolution.
Igor Nesteruk, Fu-Yun Zhao
wiley   +1 more source

Numerical Model for Cavitational Flow in Hydraulic Poppet Valves

Modelling and Simulation in Engineering, Volume 2012, Issue 1, 2012., 2012
The paper presents a numerical simulation and analysis of the flow inside a poppet valve. First, the single‐phase (liquid) flow is investigated, and an original model is introduced for quantitatively describing the vortex flow. Since an atmospheric outlet pressure produces large negative absolute pressure regions, a two‐phase (cavitating) flow analysis
Sandor I. Bernad, Romeo Susan-Resiga, Guan Heng Yeoh   +2 more
wiley   +1 more source

A numerical and experimental study on the drag of a cavitating underwater vehicle in cavitation tunnel

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, Byoung-Kwon Ahn, Hyoung-Tae Kim   +2 more
doaj   +1 more source