A study on the flow characteristics of butterfly valve with baffles

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, ha...

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Bibliographic Details
Published inJournal 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
LanguageEnglish
Published Seoul Korean Society of Mechanical Engineers 01.03.2021
Springer Nature B.V
대한기계학회
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ISSN1738-494X
1976-3824
DOI10.1007/s12206-021-0220-1

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Summary: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.
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ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-021-0220-1