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Journal articles on the topic 'Butterfly valve'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Park, Ju Yeop, and Myung Kyoon Chung. "Study on Hydrodynamic Torque of a Butterfly Valve." Journal of Fluids Engineering 128, no. 1 (August 10, 2005): 190–95. http://dx.doi.org/10.1115/1.2137348.

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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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2

Eom, K. "Performance of Butterfly Valves as a Flow Controller." Journal of Fluids Engineering 110, no. 1 (March 1, 1988): 16–19. http://dx.doi.org/10.1115/1.3243503.

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Butterfly valves have been used for shut-off and throttling-control application. It is found that the information available on loss coefficients of butterfly valves for good throttling control is limited at present. This report investigates the performance of two different configurations of butterfly valve: perforated blades and different diameter of solid blades that allow partial opening of the valve at closed position. The experimental results support the suitability of a butterfly valve for good flow control.

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3

Arman, Rizky, Yovial Mahyoedin, Kaidir Kaidir, and Nando Desilpa. "STUDI ALIRAN AIR PADA BALL VALVE DAN BUTTERFLY VALVE MENGGUNAKAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMICS." JURNAL KAJIAN TEKNIK MESIN 4, no. 1 (May 22, 2019): 38–49. http://dx.doi.org/10.52447/jktm.v4i1.1474.

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ABSTRAKValve adalah alat mekanis yang mengatur aliran atau tekanan cairan. Fungsinya adalah menutup atau membuka aliran, mengontrol laju aliran, mengalihkan aliran, mencegah aliran balik, mengontrol tekanan, atau mengurangi tekanan. Masalah yang umumnya ditemui adalah penutupan valve tidak sempurna dikarenakan adanya kotoran-kotoran yang menghalangi penutupnya untuk menutup secara sempurna. Penanganannya yang paling sederhana yaitu membersihkan dudukan dari kotoran-kotoran tadi secara intensif dan dilakukan pelumasan. Penelitian ini bertujuan untuk menjelaskan gambaran tentang simulasi aliran pada ball valve dan butterfly valve. Dan menjelaskan perbandingan tekanan, temperatur dan kecepatan distribusi air pada dua jenis valve. Tekanan fluida pada kondisi tertutup berbeda dengan kondisi terbuka. Hal ini akan berdampak terhadap kekuatan ball valve dan butterfly valve. Tekanan yang besar atau melebihi spesifikasi akan mempengaruhi mekanisme kerja dan kekuatan material. Pengaruh tekanan ini menjadi sangat penting dalam ball valve dan butterfly valve karena tekanan fluida dengan temperatur, pada kondisi tertentu bisa di luar batas spesifikasi khususnya pada ball valve Sanitary SS316 Mounting Pad 3 inci dan butterfly valve Sanitary SS 304 3 inci. Metode yang digunakan adalah Computational Fluid Dynamics dengan bantuan Software Flow Simulasi Solidwork 2014.Kata Kunci: Ball and Butterfly Valve, Solidwork, Flow Simulasi, CFD, Tekanan, Temperatur, Kecepatan aliran. ABSTRACTValves are mechanical devices that regulate fluid flow or pressure. Its function can close or open the flow, control the flow rate, divert flow, prevent backflow, control pressure, or reduce pressure. The problem commonly encountered is that the valve closure is not perfect due to the impurities that prevent the cover from closing completely. The simplest handling is to clean the holder from the dirts earlier and do lubrication. This study aims to explain the description of the flow simulation on ball valve and butterfly valve. This study also explain the comparison of pressure, temperature and velocity of water distribution in two types of valve heads. Fluid pressure under closed conditions is different from opening conditions. This will affect the strength of the ball valve and butterfly valve as a valve. Pressure that is large or exceeds specifications will affect the working mechanism and material strength. The effect of this pressure becomes very important in the ball valve and butterfly valve because of fluid pressure with temperature under certain conditions it can be out of the specification limits, especially in Sanitary SS316 Mounting Pad 3-inch ball valve and SS 304 3 inch Sanitary butterfly valve. This method was used in research is Computational Fluid Dynamics by utilizing of Flow Simulation Solidwork 2014 Software.Keywords: Ball Valve, Butterfly Valve, Solidwork 2014, Flow Simulation, CFD, Pressure, Temperature, Velocity

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4

Kimura, Takeyoshi, Takaharu Tanaka, Kazuhiko Ogawa, and Kayo Fujimoto. "Fluidmechanics Characteristics of Butterfly Valve." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 30, no. 6 (1995): 448–52. http://dx.doi.org/10.5988/jime1966.30.448.

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5

Tian, Xiao Bo, Jin Tang Yang, and Dan Meng. "CAE Simulation Study on Thermal Stress of Butterfly Valve and Actuator." Applied Mechanics and Materials 532 (February 2014): 301–6. http://dx.doi.org/10.4028/www.scientific.net/amm.532.301.

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To the valve system in the furnace hot air duct of the hot-rolled furnace in steel, the thermal Stress of butterfly valve and actuator was simulated by ANSYS. The feasibility of appropriate temperature control measures of too high temperature of butterfly valve and actuator was verified. And in the field, the transformation and the temperature measurement of butterfly valve and actuator were performed; the failure rate was calculated, to ensure that butterfly valve and actuator could meet the requirements of hot rolling.

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6

Et. al., R. Manikandan,. "Design and Analysis of Butterfly Valve." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 1S (April 11, 2021): 502–12. http://dx.doi.org/10.17762/turcomat.v12i1s.1915.

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The main objective of this project is shape optimization and structural stability of the butterfly valve for metallic and nonmetallic materials butterfly valve is mostly used in the engine carburetors need to make structural stability and shape optimization plays the main role for this component, design modifications and material comparative analysis done in ANSYS Structural modules and find the optimized shape through stress, strain and deformation results

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7

Xu, Benliang, Zuchao Zhu, Zhe Lin, Dongrui Wang, and Guangfei Ma. "Numerical and experimental research on the erosion of solid-liquid two-phase flow in transport butterfly valve based on DEM method." Industrial Lubrication and Tribology 73, no. 4 (May 10, 2021): 606–13. http://dx.doi.org/10.1108/ilt-12-2020-0454.

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Purpose The purpose of this paper is to analyze the mechanism of particle erosion in butterfly valve pipelines under hydraulic transportation conditions. The results will affect the sealing and safety of butterfly valve pipelines and hopefully serve as reference for the anti-erosion design of butterfly valve pipelines. Design/methodology/approach Through the discrete element method (DEM) simulation that considers the force between particles, the detached eddy simulation (DES) turbulence model based on realizable k-epsilon is used to simulate the solid-liquid two-phase flow-induced erosion condition when the butterfly valve is fully opened. The simulation is verified by building an experimental system correctness. The solid-liquid two-phase flow characteristics, particle distribution and erosion characteristics of the butterfly valve pipeline under transportation conditions are studied. Findings The addition of particles may enhance the high-speed area behind the valve. It first increases and then decreases with increasing particle size. With increasing particle size, the low-velocity particles change from being uniformly distributed in flow channel to first gathering in the front of the valve and, then, to gathering in lower part of it. Fluid stagnation at the left arc-shaped flange leads to the appearance of two high-speed belts in the channel. With increasing fluid velocity, high-speed belts gradually cover the entire valve surface by focusing on the upper and lower ends, resulting in the overall aggravation of erosion. Originality/value Considering the complexity of solid-liquid two-phase flow, this is the first time that the DEM method with added inter-particle forces and the DES turbulence model based on realizable k-epsilon has been used to study the flow characteristics and erosion mechanism of butterfly valves under fully open transportation conditions.

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8

Asai, Tohru. "Butterfly technique in mitral valve repair." Asian Cardiovascular and Thoracic Annals 28, no. 7 (April 6, 2020): 413–15. http://dx.doi.org/10.1177/0218492320916298.

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Degenerative mitral regurgitation due to posterior leaflet prolapse is often associated with tissue redundancy in the leaflet height and free margin of the prolapsing segment. The butterfly technique has been introduced for focal resection to precisely control the leaflet height without annular plication. This technique is indicated for a high prolapsing leaflet, greater than 20 mm. With intraoperative measurement of leaflet heights and ink dot marking as a depth indicator, the butterfly technique can be safely performed in most high posterior leaflet prolapse cases, without increasing the risk of systolic anterior motion.

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9

Mândrea, Lucian, Corina Cipu, Corina Băbuţanu, and Gabriela Oprina. "The Effects Produced by a Butterfly Valve in a Hydraulic Closed Circuit." Applied Mechanics and Materials 811 (November 2015): 117–21. http://dx.doi.org/10.4028/www.scientific.net/amm.811.117.

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The paper presents the operation of a hydraulic closed circuit equipped with a butterfly valve which can close with a step of 10o. Using four pressure transducers and one temperature transducer, the authors determined the volumetric flow rate, the average water velocity and the local pressure loss in the butterfly valve, the flow coefficient Kv and also the incipient cavitation coefficient. Recommendations for the disposal of the butterfly valve are made and conclusions are obtained regarding the range of opening degrees in which the butterfly valve is better to be used.

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10

Wang, Xiao Zhi, Hong Hui Zhu, and Zhi Gang Liu. "Coupling Effect of Temperature Stress in Butterfly Valve Mechanical System Based on FLUENT Numerical Simulation." Applied Mechanics and Materials 716-717 (December 2014): 702–6. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.702.

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The butterfly valve system is an important part of the steel heating furnace temperature control. In high temperature, the coupling effect of temperature field and stress deformation of the butterfly valve is stronger. We did not consider it in the numerical simulation research in the past, and studied the overall characteristics of butterfly valve only by 2D numerical simulation, resulting in the decrease of the numerical simulation accuracy. This paper uses the way of the FLUENT software and ANSYS software joint control, and has established the mathematical model of fluid and solid coupling effect, and has implemented the coupling effect of the temperature field and stress field of the butterfly valve system by means of three dimensional numerical simulation, then we have got the temperature distribution and stress distribution of the butterfly valve system, which provides technical reference for mechanical system design of butterfly valve.

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11

Wei, Hai Jiao, Guo Fang Wu, Fu Hong Zhang, Jiao Xue, Kun Sheng Zhou, and Xue Feng Yang. "Numerical Simulation Research of Butterfly Valve in Acoustics Field Variation Characteristics." Applied Mechanics and Materials 872 (October 2017): 217–22. http://dx.doi.org/10.4028/www.scientific.net/amm.872.217.

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A numerical simulation research was carried out on vortex and sound pressure level of the butterfly valve in the flow process based on FLUENT, which analyzed the variation of the vorticity and sound pressure level at different opening angles. There was an inverse pressure gradient in the orifice formed by the butterfly plate and pipe, which caused partial particle reflux on the back of butterfly plate in flowing, thus formed the vortex. The vortex formed on the back of the butterfly plate was decreased gradually, with the increasing opening angle of the valve in opening process. The noise was generated by the vortex separated and rupture in flowing. And the sound pressure level on the back of butterfly plate was decreased with the increasing opening angle. At the same time, the vorticity and the maximum sound pressure level position moved from the center to the rotation center of butterfly plate in opening process. The expanding orifice formed by butterfly plate upstream and the pipe and the tapered orifice formed by butterfly plate downstream and the pipe had the different throttling action to the fluid, which made the sound pressure level of upstream was higher than that of downstream in symmetrical position. The vortex generated by the separation of boundary layer would cause vortex excited vibration between plate and fluid, and then resonance occurred. The studies were carried out in the vorticity and the sound pressure level on the downstream of butterfly plate, and the changing law of those was found. It would provide a basis theory for reducing noise and avoiding vortex vibration of butterfly valve.

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12

Wu, Shixian, Heqing Liu, and Yongping Chen. "Comparative analysis of regulating characteristics between air-ring flow regulating valve and center butterfly valve." PLOS ONE 16, no. 5 (May 19, 2021): e0251943. http://dx.doi.org/10.1371/journal.pone.0251943.

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In this study, a novel air-ring flow regulating valve was proposed to reduce the flow resistance caused by valve structural pressure drop in fluid transportation pipeline system. The regulating characteristics at different valve openings were analyzed by numerical method and the results were compared with the center butterfly valve which is most widely applied in fluid transportation pipeline system. Besides, an experimental system was designed to validate the numerical model in the present study. The results indicated that the simulation results agree well with experimental data. The resistance coefficient of the air-ring flow regulating valve is smaller than that of the center butterfly valve when the valve opening is greater than 67%, and the resistance coefficient is reduced by up to 100% as the valve is fully opened. Both valves maintain approximately equal percentage flow characteristics, the deviation in relative flow coefficient is small. In addition, the wall shear stress of the air-ring flow regulating valve is much smaller than that of the center butterfly valve at the same valve opening, and the maximum velocity in the pipeline system is always smaller than that of the center butterfly valve, which significantly reduces valve surface abrasive erosion and thus prolongs its service life.

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13

Huang, Chendong, and Rhyn H. Kim. "Three-Dimensional Analysis of Partially Open Butterfly Valve Flows." Journal of Fluids Engineering 118, no. 3 (September 1, 1996): 562–68. http://dx.doi.org/10.1115/1.2817795.

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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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14

Ma, Xue Dong, and Jie Teng. "Analysis of Flow Field for Link Rod Butterfly Valve." Advanced Engineering Forum 2-3 (December 2011): 817–21. http://dx.doi.org/10.4028/www.scientific.net/aef.2-3.817.

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The link rod butterfly valve relies on the link mechanism inside the flow channel to realize opening. The flow within flow channel is complex and the flow state is uncertain, so that pressure load of the flow part can't be determined in the butterfly valve designing, and strength of the parts can’t be calculated accurately and the thrust of the hydraulic cylinder can't be determined accurately. Therefore, it is necessary to carry out flow field analysis. In this paper, by adopting the plug-in COSMOSMotion of Solidworks software, the link rod butterfly valve with DN1800 is carried on motion simulation, determining the specific opening. And then the butterfly valve at different opening is carried out the finite element analysis of the flow field, adopting the plug-in COSMOSFloworks of Solidworks of software. The result shows that: the force is the largest when the valve plate is in just opening, it is 230731N, the strength analysis of the flow part and selection of the hydraulic cylinder should be based on the working condition; When full opening, the upward force on the valve plate is 18504N, this force is the power source when the valve plate is over opening. The above mentioned work provides a reliable theoretical basis for the strength calculation and the force and energy parameters calculation of the link rod butterfly valve and the theoretical reference for flow pattern evaluation of the link rod butterfly valve.

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15

Marimuthu, Siva, and Dhavamani Chinnathambi. "Computational analysis of biomimetic butterfly valve." Bioinspired, Biomimetic and Nanobiomaterials 9, no. 4 (December 1, 2020): 223–32. http://dx.doi.org/10.1680/jbibn.20.00027.

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16

Gagas, Michael. "Butterfly Valve Adaptor Eliminates Settling Problems." Opflow 12, no. 2 (February 1986): 3. http://dx.doi.org/10.1002/j.1551-8701.1986.tb00190.x.

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17

Talekar, Aniruddha, Saurabh Patil, Prashant Thakre, and E. Rajkumar. "Butterfly valve in a virtual environment." IOP Conference Series: Materials Science and Engineering 263 (November 2017): 062053. http://dx.doi.org/10.1088/1757-899x/263/6/062053.

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18

Song, Xue Guan, Lin Wang, Seok Heum Baek, and Young Chul Park. "Multidisciplinary optimization of a butterfly valve." ISA Transactions 48, no. 3 (July 2009): 370–77. http://dx.doi.org/10.1016/j.isatra.2009.01.009.

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19

Morris, M. J., and J. C. Dutton. "Compressible Flowfield Characteristics of Butterfly Valves." Journal of Fluids Engineering 111, no. 4 (December 1, 1989): 400–407. http://dx.doi.org/10.1115/1.3243659.

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The results of an experimental investigation into the flowfield characteristics of butterfly valves under compressible flow operating conditions are reported. The experimental results include Schlieren and surface flow visualizations and flowfield static pressure distributions. Two valve disk shapes have been studied in a planar, two-dimensional test section: a generic biconvex circular arc profile and the midplane cross-section of a prototype butterfly valve. The valve disk angle and operating pressure ratio have also been varied in these experiments. The results demonstrate that under certain conditions of operation the butterfly valve flowfield can be extremely complex with oblique shock waves, expansion fans, and regions of flow separation and reattachment. In addition, the sensitivity of the valve disk surface pressure distributions to the local geometry near the leading and trailing edges and the relation of the aerodynamic torque to flow separation and reattachment on the disk are shown.

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20

Song, X. G., L. Wang, and Y. C. Park. "Analysis and optimization of a butterfly valve disc." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 223, no. 2 (January 6, 2009): 81–89. http://dx.doi.org/10.1243/09544089jpme236.

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A butterfly valve is a type of flow control device, which is widely used to regulate a fluid flowing through a section of pipe. Currently, analyses and optimization are of special important in the design and usage of butterfly valves. For the analysis, finite element method (FEM) is often used to predict the safety of valve disc, and computational fluid dynamics (CFD) is commonly used to study the flow characteristics of valve. However, it is difficult to obtain accurate results for the optimization of butterfly valve due to the high non-linearities. For this reason, metamodels or surrogate model methods are extensively employed. This paper integrates metamodel with FEM and CFD analysis to optimize a traditional butterfly valve, where the weight of the valve disc is the design objective, and the strength safety of disc and the pressure loss coefficient of valve are constraints. Kriging model is employed as a surrogate model to formulate the objectives and constrains, and the orthogonal array is used as design of experiment to sample the computer analysis. The optimum results with the corresponding variable combinations for the valve disc are obtained easily by this method. Moreover, the structural and fluid analyses with the obtained optimum variable combinations are conducted again to verify the accuracy of the optimization method. The results demonstrate the capability and potential of this method, which integrates the Kriging model with FEM and CFD analysis, in solving the optimization of a butterfly valve.

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21

Jin, Xiao Hong, Yang Shen, and Qin Fen Miao. "Simulation of Flow Field and Calculation of Moment on Valve Plate for Butterfly Valve." Applied Mechanics and Materials 312 (February 2013): 186–90. http://dx.doi.org/10.4028/www.scientific.net/amm.312.186.

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In order to control the flow rate in a butterfly valve accurately, the moment, which acts on the rotation axis of valve plate, caused by flowing fluid must be considered. Taking air as the medium, the parameters of internal flow fields, such as the velocity and pressure, are simulated by CFD for a standard butterfly valve. The distribution of velocity and pressure fields that changes with various openings and a curve of aerodynamic moment are obtained. The results show that, as the opening of valve goes larger, the resultant moment on valve plate is monotonically increased. At the opening of 70°, the moment reaches its maximum. After the opening of 70° the moment begins monotonically decreasing and the resultant moment is close to zero at 90°.

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22

Florescu, Iulian, Daniela Florescu, and Dragos Nedelcu. "Analysis of Unitary Tensions on the Butterfly Valve." Applied Mechanics and Materials 772 (July 2015): 114–19. http://dx.doi.org/10.4028/www.scientific.net/amm.772.114.

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This paper analyzes the unitary tensions variation on the butterfly valve disc in different conditions and at different opening angles. It performs simulations of flow inside the valve at different times in the dynamic action of opening and closing, which derive values disc forces and tensions variation in shaft. Analyzing different shapes and design parameters, the study allows an analysis of the dynamic behavior of the disc, with implications for the optimal design of butterfly valves and closing their body.

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23

Wang, L., X. G. Song, and Y. C. Park. "Dynamic analysis of three-dimensional flow in the opening process of a single-disc butterfly valve." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 2 (February 1, 2010): 329–36. http://dx.doi.org/10.1243/09544062jmes1679.

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A numerical dynamic analysis is carried out to simulate a three-dimensional flow and to study the performance of a single-disc butterfly valve with a diameter of 1.35 m in the opening process. The unsteady fluid flow during the opening process is studied by using the moving grid technique. The turbulent separated flow is also studied to understand the unsteady flow better through velocity distributions and pressure distributions on the mid-symmetric plane. The formation of vortexes is also discussed. Then the characteristics of butterfly valves such as the flow coefficient, the dynamic torque coefficient, and the drag coefficient are studied. The curves of these characteristics corresponding with the variational valve opening angle are obtained to investigate the performance of the single-disc butterfly valve.

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24

Park, Jong-Ho, and Han-Yung Park. "Study of Butterfly Valve Loss Coefficient Equation." Journal of Fluid Machinery 14, no. 4 (August 1, 2011): 31–37. http://dx.doi.org/10.5293/kfma.2011.14.4.031.

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25

., Aniruddha V. Kapre. "FLOW ANALYSIS OF BUTTERFLY VALVE USING CFD." International Journal of Research in Engineering and Technology 04, no. 11 (November 25, 2015): 95–99. http://dx.doi.org/10.15623/ijret.2015.0411017.

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26

Morris, M. J., and J. C. Dutton. "The Performance of Two Butterfly Valves Mounted in Series." Journal of Fluids Engineering 113, no. 3 (September 1, 1991): 419–23. http://dx.doi.org/10.1115/1.2909512.

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The results of an experimental investigation concerning the operating characteristics of two similar butterfly valves mounted in series are reported. Emphasis is given to the influence of the upstream valve disk angle, the downstream valve disk angle, the relative valve orientation, and the spacing between the valves. The dimensionless pressure drop, the mass flowrate coefficient, and the aerodynamic torque coefficient of each valve are used to characterize the system performance. The results show that the operating characteristics are strongly tied to the combined effect of the two valve disk angles. With noted exceptions, the valve disk orientation and spacing are secondary influences.

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27

Lee, Jung-Won, Bong-Cheol Shin, Yong-Kyu Cho, Myeong-Woo Cho, and Kang-Hee Lee. "A study on flow coefficient evaluation by shape change of butterfly valve." Journal of the Korea Academia-Industrial cooperation Society 13, no. 11 (November 30, 2012): 4937–43. http://dx.doi.org/10.5762/kais.2012.13.11.4937.

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28

Huh, Sun Chul, Yong Gil Jung, Won Jo Park, and Jae Joon Sim. "A Study on Sealing Mechanism of Butterfly Valve." Key Engineering Materials 326-328 (December 2006): 1259–62. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1259.

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Small Butterfly valve is specially designed for use in industry field and ship. The important parts of butterfly valve are composed of disk, stem and body. But, like LNG ship, in enviroment of low temperature, as working condition deteriorates, important of sealing more increased. In this study, we examine sealing mechanism of butter valve on the base of FEM and investigate sealing life by measurement. The finite element analysis was carried out to study the effect of the seal ring shape on bi-directional sealing force of valve. The sealing mechanism was evaluated by 2-dimensional model in order to save the analysis time. And these analyses used by material non-linearity and contact element were implemented.

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29

Morris, M. J., and J. C. Dutton. "Aerodynamic Torque Characteristics of Butterfly Valves in Compressible Flow." Journal of Fluids Engineering 111, no. 4 (December 1, 1989): 392–99. http://dx.doi.org/10.1115/1.3243658.

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The results of an experimental investigation of the aerodynamic torque characteristics of butterfly valves under compressible flow conditions are reported. Both three-dimensional prototype valves and two-dimensional planar models have been studied at choked and unchoked operating points. Other parameters investigated include the operating pressure ratio across the valve, the valve disk angle, and the disk shape. The results demonstrate the importance of flow separation and reattachment phenomena on the valve aerodynamic torque characteristics, the importance of disk shape at intermediate angles, and the sensitivity of the torque to the valve disk geometry near the leading and trailing edges where extreme pressure gradients can occur.

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30

Goksel, B., J. J. Rencis, and M. Noori. "Finite Element Analyses of a Butterfly Valve Assembly." Journal of Pressure Vessel Technology 111, no. 2 (May 1, 1989): 197–202. http://dx.doi.org/10.1115/1.3265658.

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Two and three-dimensional finite element analyses of a butterfly valve assembly subjected to static fluid pressure were carried out using commercial code ANSYS. Good agreement between the experimental and finite element results were obtained. Sensitivity of results to various boundary and loading conditions was also investigated.

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31

KIMURA, Takeyoshi, and Kazuhiko OGAWA. "Visualization of Flashing Phenomena around a Butterfly Valve." JOURNAL OF THE FLOW VISUALIZATION SOCIETY OF JAPAN 5, Supplement (1985): 15–18. http://dx.doi.org/10.3154/jvs1981.5.supplement_15.

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32

Chen, Bing, and Yu Guang Fan. "3D Modeling and Open-Close Motion Simulation of the Triple Eccentric Butterfly Valve." Advanced Materials Research 215 (March 2011): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.215.191.

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It was achieved with the benefit of excellent molding function of CAD/CAM, to solve the designing problems of rotation center of triple eccentric butterfly valve and to improve the seal performance. The Solid Edge software is applied to analyze the process of 3D modeling and motion simulation with details, as well as check both static and dynamic interference. In this way, the reasonable eccentric angle α, cone-apex angle 2β, radial eccentricity e and axial eccentricity C of valve board are acquired. It is effective to shorten the design period of triple eccentric butterfly valve, also improve the design efficiency and quality.

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33

Tan, Gui Bin, Shi Min Zhang, and Xiao Xiao Zhu. "Design of the Speed Regulating PIG with Butterfly Bypass-Valve." Advanced Materials Research 201-203 (February 2011): 429–32. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.429.

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Foreign development regarding devices for speed regulating of in-pipe robot inspection has been commercially applied in gas pipeline this decade, however, the results of theoretical and structural research on bypass device were scaled in and abroad after the research of literature. First, this paper deals with the new structure of a butterfly bypass-valve, the basic parts and working principle on this speed regulating unit. The using of a butterfly disc in bypass-hole of PIG (pipeline inspection gauge) can achieve a speed regulating purpose in bypass-PIG. Next, the theoretical model of pressure loss and regulating feasibility or ability of PIG are introduced by the similar mathematical model with a throttle valve. Finally, give the conclusion.

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34

Park, Song Mook, Hoon Ki Choi, and Geun Jong Yoo. "STUDY ON FLOW CHARACTERISTICS FOR PRECISION CONTROL BUTTERFLY VALVE." Journal of computational fluids engineering 19, no. 1 (March 31, 2014): 21–26. http://dx.doi.org/10.6112/kscfe.2014.19.1.021.

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35

Kim, Soo-Young, Dong-Myung Lee, Jung-Hoon Bae, Sung-Chul Shin, and Chang-Ho Sul. "Development of Bi-directional Triple-eccentric Type Butterfly Valve." Journal of the Society of Naval Architects of Korea 46, no. 5 (October 20, 2009): 545–51. http://dx.doi.org/10.3744/snak.2009.46.5.545.

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ingh Parmar, Yogesh Mishra, Kulvant S. "Structural Design and FEM Analysis of Large Butterfly Valve." International Journal of Innovative Research in Science, Engineering and Technology 04, no. 06 (June 15, 2015): 4146–55. http://dx.doi.org/10.15680/ijirset.2015.0406046.

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Toro, Adam Del, Michael C. Johnson, and Robert E. Spall. "Computational Fluid Dynamics Investigation of Butterfly Valve Performance Factors." Journal - American Water Works Association 107, no. 5 (May 2015): E243—E254. http://dx.doi.org/10.5942/jawwa.2015.107.0052.

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Kimura, Takeyoshi, Kazuhiko Ogawa, Itaru Uehara, and Chiaki Kuwata. "Cavitation Erosion of Piping Line behind a Butterfly Valve." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 28, no. 11 (1993): 709–16. http://dx.doi.org/10.5988/jime1966.28.709.

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WANG, XUEFANG, RONGMING TANG, ZHAOHUI YAO, DINGHUI YE, and HONGKAI YE. "Investigation of butterfly check valve with optimum closing performance." Proceedings of the JFPS International Symposium on Fluid Power 1993, no. 2 (1993): 453–58. http://dx.doi.org/10.5739/isfp.1993.453.

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Yang, Bo-Suk, Won-Woo Hwang, Myung-Han Ko, and Soo-Jong Lee. "Cavitation detection of butterfly valve using support vector machines." Journal of Sound and Vibration 287, no. 1-2 (October 2005): 25–43. http://dx.doi.org/10.1016/j.jsv.2004.10.033.

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Jun, Shen, and Kazuhiko OGAWA. "306 Distribution of cavitation bubbles around a butterfly valve." Proceedings of Conference of Kansai Branch 2012.87 (2012): _3–11_. http://dx.doi.org/10.1299/jsmekansai.2012.87._3-11_.

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Liu, Bo, Jiangang Zhao, and Jianhua Qian. "Numerical study of solid particle erosion in butterfly valve." IOP Conference Series: Materials Science and Engineering 220 (July 2017): 012018. http://dx.doi.org/10.1088/1757-899x/220/1/012018.

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Kan, Biao, Mingwei Jin, Jianning Ding, Tongshu Hua, and Guangxian Yang. "Mathematical modeling of the interference of seal pair in triple-offset butterfly valve." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 12 (March 2, 2012): 3026–31. http://dx.doi.org/10.1177/0954406212440529.

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Avoiding interference of seal pair in triple-offset butterfly valve is critical to its performance and service time. In this article, a mathematical model is proposed for the seal interface. A formula is derived to evaluate the interference of seal pair in triple-offset butterfly valve. Five parameters are considered, including the diameter of valve disc, the effective sealing thickness, axial offset, radial offset, and eccentric angle. The influences of axial offset, radial offset, and eccentric angle on the interference area and position are investigated. The results show that the interference area decreases initially and increases finally when either the axial offset or the eccentric angle increases, whereas it decreases monotonously as the radial offset increases.

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Wang, Xiao Dong, Jing Liang Dong, and Tian Wang. "Numerical Study of Large Diameter Butterfly Valve on Flow Characteristics." Advanced Materials Research 236-238 (May 2011): 1653–57. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1653.

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A numerical approach was used to investigate the flow characteristics around a butterfly valve with the diameter of 2108 mm by the commercial computational fluid dynamics (CFD) code FLUENT6.3. The simulation was carried out to predict flow field structure, flow resistance coefficient, hydrodynamics torque and so on, when the large diameter butterfly valve operated at various opening degrees. The three-dimensional simulation results shown that there are vortexes presented near valve back region as the opening degree smaller than 40 degree; the flow resistance coefficient reduces rapidly with the increasing of opening degree and the resistance coefficient is quite small as the angle larger than 50 degree; the hydrodynamic torque reduces with the increasing of opening degree and the hydrodynamic torque is smaller than 20% of maximum torque; the torque ratio and the pressure drop ratio are reduce with the increasing of opening degree, the pressure drop ratio reduces rapidly as the opening degree is smaller than 50 degree.

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Wang, Yang, Ying Zhu, Xin Rong Shen, and Jian Feng Ma. "Numerical Simulation and Experimental Research of a New Butterfly Valve." Applied Mechanics and Materials 212-213 (October 2012): 1255–60. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.1255.

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The paper proposes an idea of projection weighted area in designing a new control butterfly valve. A lot of three-dimensional numerical simulations are carried out on the new valve, and the numerical simulations give a good linear relationship between relative flow coefficient and relative valve opening. An experiment setup was established to verify the results of numerical simulations, and the results show that the CFD technology to research and design the new valve plate is entirely feasible.

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SONG, XUE GUAN, LIN WANG, and YOUNG CHUL PARK. "FLUID AND STRUCTURAL ANALYSIS OF A LARGE DIAMETER BUTTERFLY VALVE." Journal of Advanced Manufacturing Systems 08, no. 01 (June 2009): 81–88. http://dx.doi.org/10.1142/s0219686709001663.

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A butterfly valve of large diameter is commonly used as control equipments in applications where the inlet velocity is fast and the pressure is relatively high. Because the size of the valve is too large, it's too difficult to conduct testing experiment in a laboratory. In this paper, the numerical simulation using commercial package-CFX and ANSYS was conducted. In order to perform fluid analysis and structural analysis perfectly, large valve models are generated in three dimensions without much simplification. The result of fluid analysis is imported to structure analysis as a boundary condition. In addition, to describe the flow patterns and to measure the performance when valve are opened for various angles, the verification of the performance whether the valve could work safely at these different conditions or not was conducted. Fortunately, the result shows that the valve is safe in a given inlet velocity of 3 m/s, and it's not necessary to be strengthened anywhere. In the future, the shape of valve disc can be optimized to reduce the weight, and also to make the flow coefficient be closer to the suggested level.

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YUASA, Keishi, Tsutomu TAJIKAWA, and Yasuhide NAKAYAMA. "Evaluation of Valve Performance for Film-type Bioprosthetic Valve (Butterfly Bio-valve) by in Body Tissue Architecture." Proceedings of Conference of Kansai Branch 2019.94 (2019): 512. http://dx.doi.org/10.1299/jsmekansai.2019.94.512.

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Dragomirescu, Andrei, Carmen-Anca Safta, Nicolae Orăşanu, Ioan Magheţi, and Lucian Mândrea. "Vibrations of water hydraulic systems – an experimental approach." E3S Web of Conferences 85 (2019): 06006. http://dx.doi.org/10.1051/e3sconf/20198506006.

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This paper presents an experimental study of the vibrations induced both by cavitating and by non-cavitating flow in a hydraulic installation that comprises the main elements of a water hydraulic system. The cavitation was triggered by progressively closing a butterfly valve. The vibrations were measured on the pump, on the bearings housing, on the pump drive motor, and at nine measurement points located upstream and downstream of the main elements of the installation. The measurements were carried out at different flow rates obtained at different openings of the butterfly valve. The results suggest that the phenomena that take place inside the pump and inside the bearings cause vibrations having frequencies of up to 10 kHz. The results also indicate that the cavitation that occurs at the butterfly valve causes vibrations of high frequency, above 3 kHz, that have a distinct peak at about 18 kHz. These results could be useful in establishing proper maintenance plans for hydraulic installations.

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Xiaohong Jin, Yang Shen, and Qinfen Miao. "Simulation of Flow Field and Calculation of Moment on Valve Plate for Butterfly Valve." International Journal of Digital Content Technology and its Applications 7, no. 7 (April 15, 2013): 662–69. http://dx.doi.org/10.4156/jdcta.vol7.issue7.78.

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Morris, M. J., and J. C. Dutton. "An Experimental Investigation of Butterfly Valve Performance Downstream of an Elbow." Journal of Fluids Engineering 113, no. 1 (March 1, 1991): 81–85. http://dx.doi.org/10.1115/1.2926501.

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The results of an experimental investigation concerning the operating characteristics of a butterfly valve downstream of a mitered elbow are reported. Primary emphasis is given the influences of valve disk angle, valve/elbow spacing, and valve/elbow orientation on the dimensionless pressure drop, mass flow coefficient, and aerodynamic torque coefficient characteristics of the valve. The results show that when the valve is located two pipe diameters downstream of the elbow, the performance characteristics are substantially affected by the relative valve/elbow orientation. However, at a spacing of eight diameters the effect of the elbow on the valve operating characteristics is small.

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