A5100655398- Nuclear Engineering Thermal-Hydraulics
- Plasma and Flow Control in Aerodynamics
- Nuclear reactor physics and engineering
- 3D Shape Modeling and Analysis
- Nuclear Materials and Properties
- Ion-surface interactions and analysis
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Mixing
- Fluid Dynamics and Turbulent Flows
- Cyclone Separators and Fluid Dynamics
- Heat transfer and supercritical fluids
- Heat Transfer and Boiling Studies
- Radiative Heat Transfer Studies
- Advanced Vision and Imaging
- Human Pose and Action Recognition
- Computer Graphics and Visualization Techniques
- Robotics and Sensor-Based Localization
- Polymer Nanocomposite Synthesis and Irradiation
- 3D Surveying and Cultural Heritage
- Metal and Thin Film Mechanics
- Extremum Seeking Control Systems
- Copper Interconnects and Reliability
- Integrated Circuits and Semiconductor Failure Analysis
- Combustion and Detonation Processes
- Monetary Policy and Economic Impact
Korea Atomic Energy Research Institute
2009-2024
Jeju TechnoPark
2022
Seoul National University of Science and Technology
2022
Korea Energy Economics Institute
2021-2022
Nvidia (United Kingdom)
2020
Nvidia (United States)
2018-2020
Korea Advanced Institute of Science and Technology
2008-2011
The Ohio State University
2007-2010
Texas A&M University
2005
Korea Institute of Science and Technology
1995-1998
The experimental data of core flow distribution are indispensable for obtaining licensing and facilitating the design fluid systems nuclear reactors. In this study, an Advanced power reactor Core Pressure (ACOP) test facility was established to experimentally simulate internal Power Reactor 1000 (APR1000) on a reduced length scale 1/5. region simulated by using 177 simulators representing fuel assemblies APR1000. APR1000 distributions were synthetically identified accurately measured...
We present results of the development and application extremizing feedback control to high-speed high Reynolds number axisymmetric jets. In particular, we demonstrate authority on near-field pressure a Mach 0.9 jet with based diameter 7.8 ◊ 10 5 . Open-loop forcing experiments are presented wherein localized arc filament plasma actuators shown have two distinct effects pressure, similar their effect far-field acoustics reported earlier. At low Strouhal numbers (StDF’s) near column mode...
An adaptive control system using extremum-seeking optimization is developed to suppress subsonic cavity ∞ow oscillations. The overall by following two steps. First, a simple linear law which uses measurements of wall pressure ∞uctuations at difierent locations in the developed, and efiect on magnitude limit cycle produced tuning its parameters, namely gain K phase shift `, investigated analytically experimentally. Then, an algorithm implemented optimize selection most critical parameter,...
This paper presents an algorithm to reconstruct temporally consistent 3D meshes of deformable object instances from videos in the wild. Without requiring annotations mesh, 2D keypoints, or camera pose for each video frame, we video-based reconstruction as a self-supervised online adaptation problem applied any incoming test video. We first learn category-specific model collection single-view images same category that jointly predicts shape, texture, and image. Then, at inference time, adapt...
The pressure drop of a moisture separator in steam generator is the important design parameter to ensure successful performance nuclear power plant. separators have wide range operating conditions based on arrangement them. prediction challenging due complexity multi-dimensional two-phase vortex flow. In this study, test facility using air/water flow was used predict Korean OPR-1000 reactor. prototypical steam/water were simulated as by preserving centrifugal force and vapor quality. A...
The flow distribution characteristic at the reactor core is essential for licensing and design process. An hydraulic test facility was established to simulate internal of APR1000 a reduced scale 1/5. concept with an applied scaling method introduced briefly, effect lower support structure on inlet investigated experimentally, as preliminary test. characteristics were quantified discussed from directly measured rates 177 fuel assemblies.
Pressure drop across the moisture separator installed in steam generator of a nuclear power plant affects generation efficiency, and so accurate pressure prediction is important design. In this study, an empirical correlation proposed for predicting two-phase through separator. To ensure applicability correlation, series air-water experiments were performed, results present test benchmark high-pressure steam-water used developing correlation. Based on experimental results, quality,...
During the reflood phase of a large-break loss-of-coolant accident (LBLOCA) in pressurized-water reactor (PWR), fuel rods can be ballooned or rearranged owing to an increase temperature and internal pressure rods. In this study, experimental study was performed understand thermal behavior effect region on coolability using 2 × rod bundle test facility. The electrically heated used ballooning shape simulated by superimposing hollow sleeves, which have 90% blockage ratio. Forced tests were...
In this paper, we present a method of clothes retargeting; generating the potential poses and deformations given 3D clothing template model to fit onto person in single RGB image. The problem is fundamentally ill-posed as attaining ground truth data impossible, i.e., images people wearing different at exact same pose. We address challenge by utilizing large-scale synthetic generated from physical simulation, allowing us map 2D dense body pose deformation. With simulated data, propose...
Considered in this paper is the development of a dynamic model based on system identification for specific problem active control flow separation using synthetic jets. A feedback loop very crucial efficient operation Constructing jets fundamental importance to accomplish such control. We apply polynomial NARMAX (nonlinear autoregressive moving average with exogenous inputs) method results derived from numerical simulation, where interaction laminar boundary layer examined. Since pressure...
This paper considers development of an dynamic compensator for a synthetic-jet-like compression driver actuator, which has been successfully used feedback control subsonic cavity flow. System identification and design are performed using the experimental data actuator dynamics. Subspace-based method is implemented to construct control-oriented model containing time delay. The resulting matches physical system effectively in frequency domain, covering range oscillation where operates. Based...