Cavity evolution of ventilated vehicle launch under a rolling condition

W Lin, T Sun, H Xu, J Duan - Physics of Fluids, 2023 - pubs.aip.org
The unsteady development of the tail cavity of a vehicle after it leaves a tube often causes
adverse effects, most notably an impact load on the vehicle when the cavity ruptures. The …

The gas jet behavior in submerged Laval nozzle flow

Z Gong, C Lu, J Li, J Cao - Journal of Hydrodynamics, 2017 - Springer
The behavior of the combustion gas jet in a Laval nozzle flow is studied by numerical
simulations. The Laval nozzle is installed in an engine and the combustion gas comes out of …

A scaled underwater launch system accomplished by stress wave propagation technique

YP Wei, YW Wang, X Fang, CG Huang… - Chinese Physics …, 2011 - iopscience.iop.org
A scaled underwater launch system based on the stress wave theory and the slip Hopkinson
pressure bar (SHPB) technique is developed to study the phenomenon of cavitations and …

Modeling tail bubble dynamics during the launch of an underwater vehicle using the boundary element method

S Cheng, X Quan, S Zhang, T Zhang, S Li - Journal of Hydrodynamics, 2022 - Springer
A tail bubble is generated behind a high-speed vehicle at the early stage of the underwater
launch process. The tail bubble dynamic behavior involves expansion, overexpansion …

Research on inflation and floating-up process of unmanned underwater vehicle based on collaborative simulation technology

X Zhang, H Dang, B Li, J Wen - Applied ocean research, 2020 - Elsevier
For solving the problem of unmanned underwater vehicle (UUV) recovery, a
multidisciplinary collaborative simulation method is proposed to simulate the inflatable …

Groove structure on the drainage characteristics of the gas curtain

Y Hu, Y Yu, X Zhang - Ocean Engineering, 2022 - Elsevier
The high resistance caused by water in the barrel during the underwater launch poses a
daunting challenge to launch safety. To solve this problem, a new method is proposed to …

The interaction between multiple high pressure combustion gas jets and water in a water-filled vessel

J Zhao, Y Yu - Applied Ocean Research, 2016 - Elsevier
A static experimental system based on the background of the underwater gun firing process
is designed to simulate the expansion of conical-distributed multiple gas jets in a water-filled …

Experimental study on gas-curtain generation characteristics by multicombustion-gas jets in the cylindrical liquid chamber

L Zhou, Y Yu - Ocean Engineering, 2015 - Elsevier
The simulator for multicombustion-gas jets injection is designed to study the gas-curtain
generation characteristics by multicombustion-gas jets during the underwater gun launch …

Expansion characteristics of multiple wall jets in cylindrical observation chamber

Z Hu, Y Yu - Applied Thermal Engineering, 2017 - Elsevier
The objective of this study is to investigate the drag reduction effect of a new launch
technology by utilizing propellant gases to drain off water in the front of the projectile inside …

Simulations of the three-dimensional total dissolved gas saturation downstream of spillways under unsteady conditions

X Fu, LI Dan, X Zhang - Journal of Hydrodynamics, Ser. B, 2010 - Elsevier
Dams are often operated in a way to discharge over the spillways, which would cause a high
dissolved concentration of air and be harmful to fish. The bubble transfer and the water …