A study on the flow characteristics of butterfly valve with baffles

• Published in: Journal of mechanical science and technology Vol. 35; no. 3; pp. 1065 - 1073
• Main Authors: Oh, Seung-Jun, Yoon, Jeong-Hwan, Kim, Si-Pom
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01.03.2021; Springer Nature B.V; 대한기계학회
• Subjects: Butterfly valves; Computational fluid dynamics; Control; Dynamical Systems; Engineering; Flow characteristics; Flow distribution; Flow stability; Flow velocity; Globe valves; Hole size; Industrial and Production Engineering; Internal flow; Mechanical Engineering; Numerical analysis; Original Article; Production costs; Structural stability; Vibration; 기계공학; CFD; Globe valve; Butterfly valve; Flow coefficient; Baffles
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-021-0220-1

In the industry, globe valves, which are commonly used to precise control the flow rate along with opening and closing flow in pipes, are technically and economically limited in valve size due to structural instability related to complex internal flow passage. Butterfly valves, on the other hand, have advantages such as low weight and low manufacturing costs, but it is difficult to control the flow rate at an opening angle of 60°or higher and flow is unstable in the case of butterfly valve. Therefore, the purpose of this study is to have characteristics of flow rate of the globe valve that is used in the industry at the same diameter of pipeline and flow stability due to uniformity of flow through the baffle hole by adding 1/2 baffle to butterfly valve. Hole size of baffles were set at 5, 7 and 9 mm and baffles were set at the rear of the butterfly valve. To verify the method of numerical analysis, the results of experimental study were compared with the results of numerical study. As a results, it is confirmed that characteristics of flow rate of butterfly valve with baffle is similar to globe valve in the case of hole size 5 mm. In addition, flow pattern is to be stable by analyzing turbulence energy. Consequently, when applying baffle to butterfly valve, it is possible to reduce the flow unstability and change the flow rate of butterfly valve.