A5100375917- Electromagnetic Launch and Propulsion Technology
- Energetic Materials and Combustion
- Aerodynamics and Acoustics in Jet Flows
- Pulsed Power Technology Applications
- Fluid Dynamics and Turbulent Flows
- Lattice Boltzmann Simulation Studies
- Rocket and propulsion systems research
- Fluid Dynamics and Vibration Analysis
- Advanced Measurement and Detection Methods
- High-Velocity Impact and Material Behavior
- Geophysics and Sensor Technology
- Guidance and Control Systems
- Spacecraft and Cryogenic Technologies
- Astro and Planetary Science
- Flow Measurement and Analysis
- Combustion and Detonation Processes
- Structural Analysis and Optimization
- Technology Assessment and Management
- Ultrasound and Hyperthermia Applications
- Hydrogels: synthesis, properties, applications
- Laser-Plasma Interactions and Diagnostics
- Indoor and Outdoor Localization Technologies
- Radio Wave Propagation Studies
- Ferroelectric and Piezoelectric Materials
- Cavitation Phenomena in Pumps
Beihang University
2025
Northwest Institute of Mechanical and Electrical Engineering
2014-2024
Huazhong University of Science and Technology
2001-2022
Wuhan National Laboratory for Optoelectronics
2022
Jiangsu Ocean University
2018
State Nuclear Power Technology Company (China)
2014
Beijing Jiaotong University
2013
Tongji Hospital
2001
Transcranial focused ultrasound (tFUS) is regarded as a promising non-invasive stimulation tool for modulating brain circuits. The aim of this study to explore the feasibility tFUS analgesia applications.50 µl 3% formalin solution was injected into rat's left hindpaw build pain model, and then local field potential (LFP) activities dorsal horn were tracked after recording electrode placed in spinal cord. Rats randomly divided two groups: control group group. At 30th minute injection, (US-650...
This work reports on Sn-Pb binary metal inorganic perovskites as narrow-bandgap absorbers for integrated 4-terminal all-inorganic perovskite tandem solar cells (TSCs). A series of CsPb1–xSnxI3-yBry with tunable bandgaps ranging from 1.28 to 1.45 eV were synthesized through tuning the and I-Br contents. The TSC device using a CsPb0.5Sn0.5I2.7Br0.3 bottom cell wide-bandgap semi-transparent CsPbI1.5Br1.5 top achieved remarkable power conversion efficiency over 18% high open-circuit voltage...
For the multistage induction coilgun, many researchers pay great attention to improving system efficiency. The directions of magnetic field generated by driving coils are consistent for conventional because it is convenient analyze acceleration characteristic and stress status armature in barrel. In this paper, launching performance coilgun investigated terms different order improve A field-circuit coupled model a 6-stage built. simulation direction calculated. same parameter setup, last...
Driving coils in a multistage induction coilgun are stacked end to forming barrel. During launching, the pulsed current flows through driving coil, and electromagnetic force propels projectile ahead. The coil endures not only radial expansionary because of magnetic flux compression, but also axial due compressive counterforce projectile. In process design, both mechanical strength electrical insulation must be considered. Due nonlinearity materials, theoretical calculation cannot reflect...
Inequalities in health care services are becoming an increasing concern the world including China. This study measured income-related inequalities of residents Hangzhou China access to general practice and specialist identified socioeconomic factors associated with such inequalities.A cross-sectional questionnaire survey was conducted on 1048 ten urban communities Hangzhou, The percentage frequency respondents visiting (GP) hospital clinics over past four weeks prior were estimated....
During the process of launching electromagnetic railguns, armatures move along rails under thrust when current pass rails; in meantime, certain deformation will take place on rails, which as they are action Lorentz force and armature pressure. Since external support structure rail gun provides flexible for can be simplified into elastic foundation beams. Based theories field heat transfer, forces derived. The dynamic response equation is developed according to theory mechanics evaluate...
During coilgun launching, the driving coil and armature will generate a lot of heat due to pulsed current. Especially in local area armature, temperature may exceed melting point because skin effect, so that launching performance be influenced. Therefore, it is very important investigate distribution for optimizing launcher design improving system efficiency. In this paper, taking six-stage induction an example, electromagnetic-thermal coupled simulation model built using current filament...
High-speed rotation of the launching components (armature and projectile) is one most important ways to improve firing accuracy railgun, can be obtained by electromagnetic torques generated armature. However, concrete design or parameter study revolving armature-type railgun (RATR) rarely mentioned. In this article, some key parameters RATR-interior rail spacing d <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> , outer horizontal...
A hybrid numerical method of combining Large Eddy Simulation (LES) and Lighthill’s acoustic analogy theory is utilized to simulate the flow-induced noise at low Mach numbers. The aerodynamic generated by flow through a cavity, which similar valve, simulated results are validated comparing with open literature. In simulation, turbulent computed LES. After this, field simulation used compute based on commercial software ACTRAN. Finally, noise, including sound pressure level peak frequencies,...
Conventional electromagnetic rail launch projectiles are tail stabilization method for high-precision launching, but the small caliber launching systems, is not feasible due to bore size, so circular chamber anti-symmetric enhanced structure proposed. It can provide rotational torque and thrust armature achieve high initial velocity spin stability of armature. At present, adopts multitail straight slit structure, suffers from breakage instability after exiting chamber, mainly because...
Numerical simulations of hydrodynamic noise are made based on the Large Eddy Simulation for both flow-induced and from vibration shell propeller an underwater vehicle. All noises predicted by using Lighthill's acoustic analogy method, their variation characteristics along axial transverse directions, radiation directivity sound energy all investigated. It shows that laws each kind in direction have good symmetry about The is stronger than direction, decreases with increasing distance...
Abstract As a key component of an electromagnetic rail launcher, the armature plays vital role in performance launch. In order to solve contact area and structural design problems C-type armatures under large pulse current conditions, material initial state certain calibre are studied, parameters 400kA through-current capacity four times loading position constraints analysed calculated, together with characteristics made 6061-T6 7075-T6 aluminium alloys, form At same time, parametric was...
Active electromagnetic armor is a new kind of concept that integrates active defense and launch technology. During launching, the spatial movement intercepting projectile determines probability for attacking coming targets. For two perpendicular pancake coils, can be launched in different directions by changing trigger times controlled switches. In this paper, field-circuit coupled model coil launcher built first. When coils are discharged simultaneously, directed at angular bisector coils....
In order to obtain high velocity and energy conversion efficiency on synchronous induction coilgun, the armature capture effect which is inherent characteristic for coilgun need be analyzed. The reason firstly deduced analyzed through lumped-element circuit model, then quantificational result obtained based field-circuit coupled model. According analytic result, method minimize proposed from viewpoint of magnetic couple between driving coil armature. Several measures are finite element...
The driving coils in the synchronous induction coilgun are stacked end-to-end forming a barrel. During launching, pulsed current flows through coil, magnetic force propel projectile. coil endures not only outward radial because of flux compression, but also axial force. In process designing mechanical strength and electrical insulation should be both considered. Due to nonlinear materials, theoretical calculation can reflect true state for coil. static-state test method is analyzed verified...
Based on the analysis of problems existing in chinese intellectual property management Colleges and universities, combined with Huaihai Institute technology, enterprise standards Lianyungang City.It is pointed out that necessity for colleges universities to carry standards, are formulated, local high school develop practices provide reference.
High efficient and quiet propulsion of flying swimming animals promotes the investigations on acoustic scattering flow-induced noise. One challenge for aero/hydro-acoustic simulation is treatment complex moving solid boundaries, with retaining high-order accuracy. In this paper, a sharp interface immersed boundary method (IBM) was implemented in both fluid dynamics aero/hydro-acoustics, within hybrid approach. The approach combined high-fidelity DNS solver flow field low-dispersion,...
ACME facility (Advanced Core-cooling Mechanism Experiment) is a large-scale test used to validate the performance of passive core-cooling system under SBLOCA (Small Break Lost Coolant Accident) for CAP1400, an upgraded safety nuclear power plant AP1000. To simulate features properly, DELTABAR, kind differential pressure flow meter, designed measure different mass ACME. Because low loss Zero-Drift problem meters in amplified, and some measured values are distorted seriously. minimize...
A research on the monopropellant thruster catalytic decomposition and combustion process which based multicomponent ADN propellant was carried through numerical simulation method, considering bed flow resistance heat storage properties of porous media. At same time, we analyzed effect chamber length its performance, results showed that, complex physical chemical process, change had great influence performance. When combustor too short, reaction inadequate, when long, became larger, small...