Performance of Butterfly Valves as a Flow Controller

Eom, Ki-Hwan

doi:10.1115/1.3243503

Cited by 42 publications

(9 citation statements)

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“…However, there are other studies that dealt with the control of flow using different types of valves (Davis and Sorenson, 1969;Streeter, 1961;Eom, 1988;Hutchison, 1976), flow around cylinders of various length-to-width ratios (Bearman and Trueman, 1972), and the mechanism of controlling vortex shedding from rectangular bluff bodies (Mills et al, 1995).…”

Section: Introductionmentioning

confidence: 97%

Reverse Flow Phenomena of a Polyacrylamide Solution in a Channel With an Obstacle at the Entry: Influence of Obstruction Geometry

Kabir

Khan

Rasul

2012

Chemical Engineering Communications

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This study investigates the reverse-flow phenomena of a polyacrylamide solution in a channel referred to as a ''test channel'' with obstruction geometry at the entry placed in another wider parallel-walled channel. The influence of various obstruction geometries (i.e., shapes and sizes) plays a very important role in controlling reverse-flow behavior and is investigated in this study. The obstruction geometries used in this research were: flat plate, semicircle, circle, triangle, and rectangle with various aspect ratios. Experimental investigation and numerical simulations were carried out with a non-Newtonian 0.03% (by weight) polyacrylamide solution that obeys a power-law behavior for a fixed Reynolds number of 2000. The non-Newtonian fluid results are compared with that of water. The flat plate produced the maximum reverse flow at a gap-to-width (g=w) ratio of 1, whereas the triangle produced minimum reverse flow at a g=w ratio of 0.5. The circular geometry produced the maximum forward flow, and the flat plate produced the minimum forward flow at a g=w ratio of 8. Good agreement has been observed between the experimental results and numerical simulations.

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Section: Introductionmentioning

confidence: 97%

Reverse Flow Phenomena of a Polyacrylamide Solution in a Channel With an Obstacle at the Entry: Influence of Obstruction Geometry

Kabir

Khan

Rasul

2012

Chemical Engineering Communications

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“…Lacor and Hirsch (1988) also investigated the butterfly valve flows with Euler code in the immediate vicinity of the valve disk. Eom (1988) treated with the butterfly valve as a controlling device for flows. But none of them investigated three-dimensional throttled flow patterns with different valve openings.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Analysis of Partially Open Butterfly Valve Flows

Huang

Kim

1996

Journal of Fluids Engineering

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A numerical simulation of butterfly valve flows is a useful technique to investigate the physical phenomena of the flow field. A three-dimensional numerical analysis was carried out on incompressible fluid flows in a butterfly valve by using FLUENT, which solves difference equations. Characteristics of the butterfly valve flows at different valve disk angles with a uniform incoming velocity were investigated. Comparisons of FLUENT results with other results, i.e., experimental results, were made to determine the accuracy of the employed method. Results of the three-dimensional analysis may be useful in the valve design.

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“…To reduce or remove the high pressure loss when the valve is slightly open, several small holes on the valve plate can be applied. (Eom, 1988;. The streamline patterns are topologically described in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…Especially, the most difficult work is to generate grid system inside a valve, since the external and internal flow field seems to be mixed in the view of grid generation and physics of flow. Until now, the most researches on the throttle valve have focused on the pressure loss due to the valve and the characteristics of flow control (Eom, 1988;Addy et al 1985;Dutton, 1989, 1991;Caille and Laumonier, 1998), however few papers are found which investigate the general flow field according to the valve opening angles. Thus, in this paper the flow field inside a throttle valve used for a SI engine is computed numerically for several opening angles of the valve plate.…”

Section: Introductionmentioning

confidence: 99%

Topological flow characteristics in a butterfly valve used for a spark ignition engine

Kim

Choi

et al. 2006

J Vis

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The flow fields in a butterfly valve, consisting of a circular cylinder and a circular plate with a circular shaft, are numerically investigated with changing the valve angle, i.e., 15°, 45°, 75° and 90°(full-open). The corresponding Reynolds numbers are chosen as 10 4 , 4 × 10 4 , 7 × 10 4 , and 10 5 . The pressure drops between the entrance and the exit of the valve are 0.904, 0.575, 0.382 and 0.199, respectively at the above four valve positions. The moment coefficients calculated for the valve shaft are mostly due to the unbalanced pressure distribution on the both sides of the valve plate and -0.365, -0.082, -0.033 and 0, respectively, for each valve angle. The pressure distribution on the valve cylinder and the topological streamline patterns qualitatively show the flow field exceedingly agitated by the valve plate and its shaft.

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Performance of Butterfly Valves as a Flow Controller

Cited by 42 publications

References 0 publications

Reverse Flow Phenomena of a Polyacrylamide Solution in a Channel With an Obstacle at the Entry: Influence of Obstruction Geometry

Reverse Flow Phenomena of a Polyacrylamide Solution in a Channel With an Obstacle at the Entry: Influence of Obstruction Geometry

Three-Dimensional Analysis of Partially Open Butterfly Valve Flows

Topological flow characteristics in a butterfly valve used for a spark ignition engine

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