A5023460496- Spacecraft and Cryogenic Technologies
- Rocket and propulsion systems research
- Spacecraft Design and Technology
- Gas Dynamics and Kinetic Theory
- Radiative Heat Transfer Studies
- Advanced Battery Technologies Research
- Energetic Materials and Combustion
- Heat Transfer and Optimization
- Electrohydrodynamics and Fluid Dynamics
- Combustion and flame dynamics
- Thermochemical Biomass Conversion Processes
- Calibration and Measurement Techniques
- Engineering Applied Research
- Plasma Diagnostics and Applications
- Minerals Flotation and Separation Techniques
- Heat Transfer and Boiling Studies
- Infrared Target Detection Methodologies
- Planetary Science and Exploration
- Photonic and Optical Devices
- Phase-change materials and chalcogenides
- Space Satellite Systems and Control
- Advanced Multi-Objective Optimization Algorithms
- Catalysts for Methane Reforming
- Heat Transfer Mechanisms
- Advanced Combustion Engine Technologies
Sejong University
2014-2024
Korea Aerospace Research Institute
2005-2012
Korea Advanced Institute of Science and Technology
2007-2010
Samsung (South Korea)
2007
Flat heat pipe, vapor chamber, thermal ground plane, and spreader have been emerging topics for various applications such as electric battery packs high-power computer chips. In this study, computational fluid dynamics is used to model the effective conductivity of a chamber plane. From literature, simulation conditions are obtained different flat pipe geometries. With commercial code Fluent (Ansys Inc.), 4,800 cases examine spreading resistance tendencies sink areas, source area, thickness,...
Heat exchangers are usually designed using a sophisticated process of trial-and-error to find proper values unknown parameters which satisfy given requirements. Recently, the design heat evolutionary optimization algorithms has received attention. The major aim present study is propose an improved Gaussian quantum-behaved particle swarm (GQPSO) algorithm for enhanced performance and its verification through application multivariable thermal-economic problem crossflow plate–fin exchanger...
In general, a space propulsion system has crucial role in the normal mission operations of spacecraft. Depending on types and number propellants, monopropellant bipropellant thrusters are mostly utilized for low thrust liquid rocket engines. As plume gas flow exhausted from these small expands freely vacuum environment along all directions, adverse effects impingement onto spacecraft surfaces can dramatically reduce function performance Thus, purpose present study is to investigate compare...
Satellite attitude is usually controlled by plume exhaust from thrusters into the vacuum of space. To study effects in highly rarefied region, Direct Simulation Monte Carlo (DSMC) method used, because flow field contains entire range regime near-continuum near nozzle exit through transitional state to free molecular at far region nozzle. The purpose this investigate behavior a small monopropellant thruster numerically using DSMC method. obtain more accurate results, preconditioned...
This study improves the performance of a spaceborne synthetic aperture radar (SAR) system using an antenna mask design method and pattern synthesis algorithms for active phased array SAR system. The is important component that affects because it closely related to pattern. proposes based on several previous studies as well algorithm, which quantum-behaved particle swarm optimization (QPSO) designed masks synthesized patterns demonstrate proposed algorithm QPSO can be used improve applications.