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TECHNICAL PAPERS

Aerodynamic Torque of a Butterfly Valve—Influence of an Elbow on the Time-Mean and Instantaneous Aerodynamic Torque

[+] Author and Article Information
F. Danbon, C. Solliec

Ecole des Mines de Nantes, Département Systèmes, Energétiques et Environnement, Division Dynamique, des Fluides et Procédés, 4, rue A. Kastler, B. P. 20 722, F 44 307 Nantes, France

J. Fluids Eng 122(2), 337-344 (Feb 16, 2000) (8 pages) doi:10.1115/1.483262 History: Received October 08, 1999; Revised February 16, 2000
Copyright © 2000 by ASME
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References

Eom,  K., 1988, “Performance of butterfly-valves as a flow controller,” ASME J. Fluids Eng., 110, pp. 16–19.
Silvester,  R. S., 1982, “Torque induce by butterfly-valve carrying a compressible flow,” Proc. Inst. Mech. Eng., 196, pp. 229–237.
Morris, M. J., Dutton, J. C., and Addy, A. L., 1987, “Peak torque characteristics of butterfly-valves,” Proceedings of the Forum on Industrial Applications of Fluids Mechanics, ASME, 54 , pp. 63–66.
Morris,  M. J., and Dutton,  J. C., 1989, “Aerodynamic torque characteristics on butterfly-valves in compressible flow,” ASME J. Fluids Eng., 111, pp. 392–399.
Kurkjian, A., and Pratt, H. C, 1974, “Follow these simple rules to get life from your large butterfly-valves,” Air Gas and Liquid Handling, Power, McGraw-Hill Inc., New York, pp. 42-45. .
Morris, M. J., 1987, “An investigation of compressible flow through butterfly-valves,” Ph.D. thesis, Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign.
Solliec,  C., and Danbon,  F., 1999, “Aerodynamic torque acting on a butterfly valve. Comparison and choice of a torque coefficient,” ASME J. Fluids Eng., 121, No. 4, pp. 914–917.
Solliec,  C., and Mary,  J., 1995, “Simultaneous measurements of fluctuating pressures using piezoresistive multichannel transducers as applied to atmospheric wind tunnel tests,” J. Wind Eng. Ind. Aerodyn., 56, pp. 71–86.
Huang,  C., and Rhyn,  H., Kim, 1996, “Three-dimensional analysis of partially open butterfly-valve flows,” ASME J. Fluids Eng., 118, pp. 562–568.
Morris,  M. J., and Dutton,  J. C., 1989, “Compressible flow field characteristics of butterfly-valves,” ASME J. Fluids Eng., 111, pp. 399–407.
Morris,  M. J., and Dutton,  J. C., 1991, “An experimental investigation of butterfly-valve performance downstream of an elbow,” ASME J. Fluids Eng., 113, pp. 81–85.
Bryer, D. W., and Walshe, D. E., 1969, “Devices for reducing the fluid-dynamic torque on butterfly-valve discs,” National Physical Laboratory Aerodynamics Division, Report 1298.
Strzelecki, A., Abolivier, M., Prenel, J. P., and Gajan, P., 1997, “Visualisation d’écoulements dans un coude par translation de nappe synchronisée,” Visualisation et traitement d’images en Mécanique des Fluides, Proc. 7e colloque National, Saint-Louis, pp. 239–243.

Figures

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Forces acting on a butterfly valve
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Schematic view of the test bench and nomenclature
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Photography of the valve model (1/6) with its pressure taps and scanners
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Pressure taps location and cross section of the valve
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Velocity and turbulence intensity in the median horizontal plane-straight pipe configuration (Vd=40 m/s, uncertainty in U=±2 percent)
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Velocity and turbulence intensity profiles in the median horizontal plane-straight configuration (Vd=40 m/s, α=0 deg, uncertainty in U=±2 percent and in α=±1 deg)
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Velocity and turbulence intensity profiles in the median vertical plane-elbow configuration (Vd=40 m/s, uncertainty in U=±2 percent)
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Velocity and turbulence intensity profiles in the median horizontal plane-elbow configuration (Vd=40 m/s, uncertainty in U=±2 percent)
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Velocity and turbulence intensity profiles in the median vertical plane-elbow configuration (Vd=40 m/s, α=0 deg, uncertainty in U=±2 percent and in α=±1 deg)
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Velocity and turbulence intensity profiles in the median horizontal plane-elbow configuration (Vd=40 m/s, α=0 deg, uncertainty in U=±2 percent and in α=±1 deg)
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Velocity and turbulence intensity profiles in the median horizontal plane-straight pipe configuration (Vd=40 m/s, α=30 deg, uncertainty in U=±2 percent and in α=±1 deg)
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Velocity and turbulence intensity profiles in the median horizontal plane-elbow configuration (Vd=40 m/s, α=30 deg, uncertainty in U=±2 percent and in α=±1 deg)
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Time-mean torque coefficient as a function of the valve disk angle (uncertainty in T=±2 percent and in α=±1 deg)
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Influence of the elbow on the time-mean torque coefficient CTP at x/D=1 (uncertainties in CTP=±2 deg and in α=±1 deg)
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Comparison between time-mean torque coefficients CTP and CTD for different opening angles in the straight pipe configuration (uncertainties in CT=2 percent and in α=±1 deg)
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Time history of the torque coefficient in presence of an elbow located at x/D=1 to 8 and in the straight pipe configuration, α=0 deg
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Time history of the torque coefficient in presence of an elbow located at x/D=1 to 8 and in the straight pipe configuration, α=30 deg
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Flow structure downstream of an elbow
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Root mean square of the torque coefficient according to the spacing x/D and to the valve angle α
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Power spectrum of the torque for α=0 deg at different distances x/D
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Power spectrum of the torque for α=30 deg at different distances x/D

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