Moon Ki Chung

TL;DR: In this paper, the spacer grid effects on turbulent flow structure was investigated using an LDV (Laser Doppler Velocimeter) and the measured parameters are axial velocity and turbulent intensity, skewness factor, and flatness factor.

TL;DR: In this paper, the authors investigated the direct contact condensation phenomenon, which occurs when steam is injected into the subcooled water, and found that the magnitude of the average condensation heat transfer coefficient depends mainly on the steam mass fin.

TL;DR: In this article, an experimental study of steam condensation on a subcooled thick water layer (0.018 ~ 0.032 m) in a countercurrent stratified flow has been performed using a nearly horizontal circular pipe.

TL;DR: In this paper, the detailed hydraulic characteristics in subchannels of 55 PWR (Pressurized Water Reactor) rod bundles were measured using one-component He-Ne LDV(Laser Doppler Velocimeter).

TL;DR: In this article, the local hydraulic characteristics in a single phase flow of a 66 rod bundle with neighboring different spacer grids were measured by using a LDV(Laser Doppler Velocimeter) system.