A5100407925- Fluid Dynamics Simulations and Interactions
- Fluid Dynamics and Heat Transfer
- Thermal and Kinetic Analysis
- Energetic Materials and Combustion
- Combustion and Detonation Processes
- Ship Hydrodynamics and Maneuverability
- Surface Modification and Superhydrophobicity
- Rocket and propulsion systems research
- Aerodynamics and Fluid Dynamics Research
- Granular flow and fluidized beds
- Particle Dynamics in Fluid Flows
- Risk and Safety Analysis
- Computational Fluid Dynamics and Aerodynamics
- Photopolymerization techniques and applications
- Chemistry and Chemical Engineering
- Sports Dynamics and Biomechanics
- Chemical Thermodynamics and Molecular Structure
- Engineering and Material Science Research
- Lattice Boltzmann Simulation Studies
- Guidance and Control Systems
- Cavitation Phenomena in Pumps
- Epoxy Resin Curing Processes
- Fluid Dynamics and Vibration Analysis
Nanjing University of Science and Technology
2020-2024
Northeast Petroleum University
2017-2018
In the present work, a three-dimensional numerical model with six-degrees-of-freedom is adopted to carry out investigation of twin water entries two spheres side-by-side. The shear-stress transport k–ω used detail turbulence structure, and air–water interface tracked through volume fluid method. motion consecutive entry simulated using an independent overset grid technology. Numerical results reveal variation different kinds lateral forces experienced by trailing sphere following entry,...
This paper delves into the dynamics of a sphere entering flowing water at varying impact velocities and flow speeds. Using high-speed photography system image processing, we track cavity evolution trajectory. Flowing is observed to tilt postpone its detachment from free surface. Beyond surface sealing, identify flowing-induced pinch-off phenomenon during entry, marking transition in closure regimes. establishes threshold impacting angle pull-away length. By mapping phase diagram Reynolds...
In this study, a three dimensional (3D) numerical model of six-degrees-of-freedom (6DOF) is applied to simulate the water entries twin spheres side-by-side at different lateral distances and time intervals. The turbulence structure described using shear-stress transport k-ω (SST k-ω) model, volume fluid (VOF) method used track complex air-liquid interface. motion during entry simulated an independent overset grid. verified by comparing cavity evolution results from simulations experiments....
Multiple projectiles moving in water often encounter problems such as motion disturbance from adjacent body and unsteady cavity coupling, making the flow structure characteristics very complex. In this study, a computational fluid dynamics (CFD) method is employed to model two parallel supercavitating side-by-side. The details around are presented, variation of mutual with axis distance velocity analyzed. Numerical results show that cavities feature good mirror symmetry, influence on contour...
The hydroxyl-terminated polyether (HTPE) solid propellants are widely recognized as promising alternatives for polybutadiene (HTPB) due to their compliance with insensitive munition characteristics of composite propellant. This study reports thermal stability investigation HTPE in different scales the help differential scanning calorimetry (DSC, 0.9 mg), accelerating rate (ARC, 0.219 g), and slow cook-off (112 g) tests by taking HTPE/A3/Al/AP/PSAN propellant an example. More importantly,...
The extent of damage that is developed during the production, transportation, storage, and handling propellants after a low-velocity impact an important factor in evaluating dangerous threat such as deflagration-to-detonation transition. In this paper, friability test was performed to evaluate critical ignition velocity (CIIV), fragmentation degree, potential reaction violence four 3, 3-Bis(azidomethyl)oxetane (BAMO) tetrahydrofuran (THF) copolymer-propellants (PBT-propellants) with various...
Abstract Tert ‐butyl peroxypivalate is a typical free radical polymerization initiator due to the active O−O peroxide group, and it thermal instability material. To evaluate safety of tert peroxypivalate, Dewar test, Differential Scanning Calorimetry (DSC) Accelerating Rate Calorimeter (ARC) were used study self‐accelerating decomposition temperature ( SADT ), performance parameters kinetic parameters. The results DSC reveal that onset was 76.30 °C. apparent activation energy E ) 91.86 kJ...
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When multiple projectiles enter the water, challenges such motion interference among various bodies and unstable cavity coupling arise, which complicates flow field structure characteristics. This study presents establishment of a CFD (Computational Fluid Dynamics) approach to simulate hydrodynamic properties high velocity vertical water entry parallel projectiles. The validity numerical method is confirmed by experimental results. In addition, variation characteristics with axis distance...