Since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated theoretically. For this, a recently developed two-dimensional butterfly valve model is solved through the free-streamline theory with a newly devised iterative scheme and the resulting two-and three-dimensional torque coefficients are compared with previous theoretical results based on the conventional butterfly valve model and experiments. Comparison shows that the improvement due to the new butterfly valve model is marginal. That is, the three-dimensional torque coefficient is well represented by the new model. Otherwise, the two-dimensional torque coefficient is well predicted by the conventional model. In spite this fact, the present results can be used in further researches on butterfly valves because the improved butterfly valve model is mathematically correct and reflects physical reality more correctly than the conventional valve model.
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January 2006
Technical Briefs
Study on Hydrodynamic Torque of a Butterfly Valve
Ju Yeop Park,
Ju Yeop Park
Regulatory Research Division,
e-mail: k385pjy@kins.re.kr
Korea Institute of Nuclear Safety
, 19 Guseong-dong, Yuseong-gu, Daejeon, 305-338, Korea
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Myung Kyoon Chung
Myung Kyoon Chung
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Korea
Search for other works by this author on:
Ju Yeop Park
Regulatory Research Division,
Korea Institute of Nuclear Safety
, 19 Guseong-dong, Yuseong-gu, Daejeon, 305-338, Koreae-mail: k385pjy@kins.re.kr
Myung Kyoon Chung
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, KoreaJ. Fluids Eng. Jan 2006, 128(1): 190-195 (6 pages)
Published Online: August 10, 2005
Article history
Received:
July 26, 2005
Revised:
August 10, 2005
Citation
Park, J. Y., and Chung, M. K. (August 10, 2005). "Study on Hydrodynamic Torque of a Butterfly Valve." ASME. J. Fluids Eng. January 2006; 128(1): 190–195. https://doi.org/10.1115/1.2137348
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