A Study on Flow Coefficient and Flow Characteristics for Butterfly Valve by Numerical Analysis

수치해석에 의한 버터플라이 밸브의 유량계수 및 유동특성에 관한 연구

  • Published : 2012.08.31

Abstract

The objective of this study is to simulate flow coefficient and flow characteristics such as velocity and pressure distribution for butterfly valve. Butterfly valves used in this study are 65A, 80A and 100A, in size, and of which the opening angle is varied. The flow coefficient, Kv, increases as the disc opening and valve size are increase. When using flow coefficient meanwhile specific curve of flow rate is also determined. The flow velocity between disc and seat increase as the disc opening decrease. The re-circulating zone is also observed in downstream behind disc.

Keywords

References

  1. ISO 5752, "Metal Valve for Use in Flanged Pipe Systems - Face-to-Face and Centre-to-Face Dimensions".
  2. Rho, B. J., Lee, J. K. and Choi, H. J., "Effects of the Blockage Ratio of a Valve Disk on Loss Coefficient in a Butterfly Valve", Transactions of the KSME B, Vol. 32, No. 1, pp. 39-46, 2008.
  3. Oh, S. H., Lee, Y. H., Kang, H. G., Song, H. G., Kang, J. H. and Park, Y. C., "A Study on Relationship of Flow Coefficient and Valve Type for Design of Butterfly Valve", J. of Korean Navigation and Port Research, Vol. 31, No. 1, pp. 49-53, 2007.
  4. Yoon, J. Y., Lee, S. J. and Kim, E. S., "Numerical Analysis of Flows in Butterfly Valves to Prevent Cavitation", J. of Fluid Machinery, Vol. 7, No. 1, pp. 9-16, 2004.
  5. Lee, J. U., Lee, D. H., Choi, Y. H., "Numerical Analysis of Incompressible and Compressible Flow Around a Butterfly Valve", Energy Engg J., Vol. 11, No. 1, pp. 26-33, 2002.
  6. Cho, D. H., "Flow Characteristics in the Downstream Region of a Butterfly Valve with Various Disk Opening Angle", J. of the Korean Society of Marine Environment & Safety, Vol. 12, No. 4, pp. 267-272, 2006.
  7. Shim, J. S., Huh, H. S., Byun, D. G. and Suh, Y. K., "Characteristics of Flow for Various Rotating Angle in a Cylindrical Tube", The Second National Congress on Fluids Engineering, pp. 75-78, August 22-24, Muju, Korea, 2002.
  8. Lee, D. M. and Park, S. O., "A Study on the Torque Characteristics of Butterfly Valve Disc in Fire Protection", T. of Korean Institute of Fire Sci.& Eng., Vol. 16, No. 2, pp. 33-37, 2002.
  9. Ogawa, K. and Kimura, T., "Hydrodynamic Characteristics of a Butterfly Vale - Prediction of Torque Characteristics", ISA Transaction, Vol. 34, pp. 327-333, 1995.
  10. Kim, S. W., Choi, Y. D., Kim, J. H., Lee, Y. H., "Flow Characteristics of Cryogenics Butterfly Valve for LNG Carrier(Part 1 : CFD Analysis and its Comparison with Experimentation)", J. of Fluid Machinery, Vol. 11, No. 2, pp. 13-19, 2008.
  11. Park, Y. C., Park, H. S., Kim, S. P., "Analysis Method on Structural Safety Evaluation of Butterfly Valve of Piping for LNG Carrier", J. of the Korean Society of Manufacturing Process Engineers, Vol. 7, No. 4, pp. 76-81, 2008.
  12. Skousen, P. L., "Valve Handbook", Second Edition, McGraw-Hill Handbooks.