Numerical Analysis of the Effect of Hole Size Change in Lower-Support-Structure-Bottom Plate on the Reactor Core-Inlet Flow-Distribution

2015 ◽  
Vol 39 (11) ◽  
pp. 905-911 ◽  
Author(s):  
Gong Hee Lee ◽  
Young Seok Bang ◽  
Ae Ju Cheong
Keyword(s):  
Numerical Analysis ◽  
Reactor Core ◽  
Flow Distribution ◽  
Bottom Plate ◽  
Hole Size ◽  
Size Change ◽  
Support Structure ◽  
Inlet Flow

Numerical analysis of flow distribution for combined weapon system in environmental tester

2012 ◽  
Vol 26 (10) ◽  
pp. 3339-3345 ◽  
Author(s):  
Sung-Dae Kim ◽  
Sang-Hwa Baek ◽  
Tae-Yeob Kang ◽  
So-Jin Park ◽  
Chulju Kim ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Flow Distribution ◽  
Weapon System

CFD Analysis of the Coolant Mixing within the Upper Plenum of a Pressurized Water Reactor (PWR)

2013 ◽  
Vol 444-445 ◽  
pp. 411-415 ◽  
Author(s):  
Fu Cheng Zhang ◽  
Shen Gen Tan ◽  
Xun Hao Zheng ◽  
Jun Chen
Keyword(s):  
Temperature Distribution ◽  
Fluid Dynamic ◽  
Characteristic Temperature ◽  
Reactor Core ◽  
Flow Distribution ◽  
Sensitivity Study ◽  
Cfd Model ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Water Reactor

In this study, a Computational Fluid Dynamic (CFD) model is established to obtain the 3-D flow characteristic, temperature distribution of the pressurized water reactor (PWR) upper plenum and hot-legs. In the CFD model, the flow domain includes the upper plenum, the 61 control rod guide tubes, the 40 support columns, the three hot-legs. The inlet boundary located at the exit of the reactor core and the outlet boundary is set at the hot-leg pipes several meters away from upper plenum. The temperature and flow distribution at the inlet boundary are given by sub-channel codes. The computational mesh used in the present work is polyhedron element and a mesh sensitivity study is performed. The RANS equations for incompressible flow is solved with a Realizable k-ε turbulence model using the commercial CFD code STAR-CCM+. The analysis results show that the flow field of the upper plenum is very complex and the temperature distribution at inlet boundary have significant impact to the coolant mixing in the upper plenum as well as the hot-legs. The detailed coolant mixing patterns are important references to design the reactor core fuel management and the internal structure in upper plenum.

scholarly journals Research on Influence of Different Simulation Methods of Bypass Flow in Thermal Hydraulic Analysis on Temperature Distribution in HTR-10

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Shiyan Sun ◽  
Youjie Zhang ◽  
Yanhua Zheng
Keyword(s):  
Temperature Distribution ◽  
Reactor Core ◽  
Flow Distribution ◽  
Maximum Temperature ◽  
Flow Ratio ◽  
Hydraulic Analysis ◽  
Bypass Flow ◽  
Pebble Bed ◽  
The Core ◽  
Thermal Hydraulic Analysis

In pebble-bed high temperature gas-cooled reactor, gaps widely exist between graphite blocks and carbon bricks in the reactor core vessel. The bypass helium flowing through the gaps affects the flow distribution of the core and weakens the effective cooling of the core by helium, which in turn affects the temperature distribution and the safety features of the reactor. In this paper, the thermal hydraulic analysis models of HTR-10 with bypass flow channels simulated at different positions are designed based on the flow distribution scheme of the original core models and combined with the actual position of the core bypass flow. The results show that the bypass coolant flowing through the reflectors enhances the heat transfer of the nearby components efficiently. The temperature of the side reflectors and the carbon bricks is much lower with more side bypass coolant. The temperature distribution of the central region in the pebble bed is affected by the bypass flow positions slightly, while that of the peripheral area is affected significantly. The maximum temperature of the helium, the surface, and center of the fuel elements rises as the bypass flow ratio becomes larger, while the temperature difference between them almost keeps constant. When the flow ratio of each part keeps constant, the maximum temperature almost does not change with different bypass flow positions.

Numerical Analysis of Internal Flow Distribution in Scale-Down APR+

2013 ◽  
Vol 37 (9) ◽  
pp. 855-862 ◽  
Author(s):  
Gong Hee Lee ◽  
Young Seok Bang ◽  
Sweng Woong Woo ◽  
Do Hyeong Kim ◽  
Min Gu Kang
Keyword(s):  
Numerical Analysis ◽  
Flow Distribution ◽  
Internal Flow ◽  
Scale Down

Numerical Simulation of Multi-Phase Flow Distribution in Parallel Pipelines System of Oil Transfer Station

2019 ◽  
Author(s):  
Yingying Wang ◽  
Chunsheng Wang ◽  
Qiji Sun ◽  
Yuling Lv
Keyword(s):  
Numerical Simulation ◽  
Branch Pipe ◽  
Flow Distribution ◽  
Simulation Models ◽  
Phase Flow ◽  
Gas Oil ◽  
Inlet Flow ◽  
Multi Phase Flow ◽  
Oil Water ◽  
Multi Phase

Abstract The mal-distribution of gas-oil-water multi-phase flow in parallel petroleum processing pipelines can directly affect the working condition of the separators. In this paper, the influence of different factors on the flow distribution and the characteristics of gas-oil-water distribution in parallel pipelines was investigated by three-dimensional CFD numerical simulation. Firstly, four different simulation models are established based on different arrangement types of parallel pipelines. The simulation results show that the distribution of gas-oil-water flow in the radial entry symmetrical two-stage pipe-laying simulation model was the most uniform among the four simulation models. Then, four radial entry symmetrical two-stage pipe-laying simulation models with different distance between branch pipes were establish. From the simulated results, it can be found that the distance has no effect on the distribution of gas-oil-water flow in each branch pipe, but great influence on distribution of flow rate in each branch pipe. Finally, the influence of the inlet flow characters on the flow distribution is investigated. It can be found that the “bias flow” phenomenon of the parallel pipelines decreasing with the increase of the inlet flow velocity, the gas content of inlet flow and the water content of inlet liquid.

Sign in / Sign up

Export Citation Format

Share Document