1. Water Hammer simulation - KEPCO Project
(Jan. 2020 - March 2021)
Embedded Files
Reheat Steam Pipes
CIWHs Reported by KEPCO
2D Water hammer simulation using OpenFOAM
The volume fraction of water & Pressure
in horizontal pipes
The volume fraction of water & Pressure
in vertical pipes
<Horizontal region>
<Vertical region>
•The CIWH was simulated with CFD using OpenFOAM with a real re-heat steam pipe of our partner company
•The regions where CIWHs occurred were divided into two regions: horizontal and vertical
•CFD simulations were performed by applying 55 operating conditions, and the pressure gauged in the pipe differed by about 12 times depending on the operating conditions
•The learning episode was constructed to find the optimal operating conditions using the PPO reinforcement learning algorithm
•The new operating conditions obtained from the PPO enabled CIWH mitigation in the vertical pipe region
2. Couping VOF and Level-Set method (CLSVOF)
(w/ Bubble Rising cases)
Volume-of-Fluid method (VOF)
Level-set (LS) method
CLSVOF
VOF
3D Bubble Rising Cases
CLSVOF
VOF
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