M. S. Kim - Korea Railroad Research Institute, Metropolitan Transportation Research Center, Uiwang-si, Gyeonggi-do, Republic of Korea
H. S. Seong - DH Controls Co., Ltd., Research Institute, Gangseo-gu, Busan, Republic of Korea
J. H. Yang - Gyeongsang National University, Department of Mechanical System Engineering, Tongyeong-si, Gyeongsangnam-do, Republic of Korea
S. W. Lee - Gyeongsang National University, Department of Mechanical System Engineering, Tongyeong-si, Gyeongsangnam-do, Republic of Korea
S. W. Choi - Gyeongsang National University, Department of Mechanical System Engineering, Tongyeong-si, Gyeongsangnam-do, Republic of Korea

The performance a valve has been frequently estimated with numerical methods owing to limitations such as cost and place. In this study, for the triple-offset butterfly valves, the different sizes in various disc-opening cases was numerically conducted using different turbulence models of the two-equation turbulence models of k–ε, k-ω, and Reynolds stress model. The numerical calculations were validated against experimentally obtained valve flow test results. The numerical effect with the different turbulence models were analyzed with respect to the disc-opening cases. From the numerical analysis, the Reynolds stress model exhibits the most pronounced turbulence effects among the various turbulence models showing higher value of Reynolds normal stress near the valve disc region. The sensitivity of the turbulence model constants was examined using the ۳۰۰ mm valve to observe the sensitivity of the turbulence model parameters in the two-equation turbulence models.

Triple-offset butterfly valve, Two-equation turbulence model, Valve flow, Reynolds stress, Turbulence constant