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| Transient simulation of valve core movement of pilot-control globe valve in vertical pipelines |
| QIAN Jinyuan1, ZHU Yinfa2, LIU Buzhan1, LU Anle3, JIN Zhijiang1 |
| 1.Institute of Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, China; 2.Engineering and Design Institute, Lishui University, Lishui, Zhejiang 323000, China; 3.Shanghai Nuclear Engineering Research and Design Institute, Shanghai 200233, China |
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Abstract A novel pilot-control globe valve, which can be used in vertical pipelines with a lower driving energy consumption, is proposed. A governing equation for valve core motion is obtained through a theoretical analysis of the forces applied on the valve core. A 3D simulation of valve core motion is conducted in Fluent by making use of User Defined Function(UDF)to involve different spring stiffness, steady state displacements, impact speeds and transient state displacements. The results show that there are different opening modes for different spring stiffness. For smaller spring stiffness, the valve is subject to a quicker response to flow to ensure it can work properly; however, this can more easily result in a higher impact speed. With the increasing of spring stiffness, the steady displacement of the core reduces especially beyond a turning point. Besides, the numerical transient displacements with 0.9 and 1.1 times the spring stiffness show good agreement with those obtained from a theoretical analysis. It is found out that the real spring design point should have 0.9 time the spring stiffness determined by the theoretical analysis. This paper provides a reference for designing and application of pilot-control globe valves or other valves with similar structures.
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Received: 17 September 2015
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| [1]AMIRANTE R, DISTASO E, TAMBURRANO P. Experimental and numerical analysis of cavitation in hydraulic proportional directional valves[J]. Energy conversion and management, 2014, 87: 208-219.[2]AMIRANTE R, ANDREA C L, TAMBURRANO P. The importance of a full 3D fluid dynamic analysis to evaluate the flow forces in a hydraulic directional proportional valve [J].Engineering computations, 2014, 31(5):898-922.[3]AUNG N Z, YANG Q, CHEN M, et al. CFD analysis of flow forces and energy loss characteristics in a flapper-nozzle pilot valve with different null clearances[J].Energy conversion and management, 2014, 83(7): 284-295.[4]AUNG N Z, LI S. A numerical study of cavitation phenomenon in a flapper-nozzle pilot stage of an electrohydraulic servo-valve with an innovative flapper shape[J].Energy conversion and management, 2014, 77(1): 31-39.[5]LIU Q, BO H, QIN B. Experimental study and numerical analysis on electromagnetic force of direct action solenoid valve[J]. Nuclear engineering and design, 2010, 240(12): 4031-4036.[6]LIU Q, BO H. Design and analysis of operation performance of parameters of the integrated valve under the high temperature condition[J]. Annals of nuclear energy, 2014, 71: 237-244.[7]JIN Z, WEI L, CHEN L, et al. Numerical simulation and structure improvement of double throttling in a high parameter pressure reducing valve[J]. Journal of Zhejiang University science A, 2013, 14(2): 137-146.[8]CHERN M J, HSU P H, CHENG Y J, et al. Numerical study on cavitation occurrence in globe valve[J]. Journal of energy engineering, 2012, 139(1): 25-34.[9]CHERN M J, WANG C H, LU G T, et al. Design of cages in globe valve[J]. Proceedings of the institution of mechanical engineers, part c: Journal of mechanical engineering science, 2015, 229(3): 476-484.[10]SONG X, CUI L, CAO M, et al. A CFD analysis of the dynamics of a direct-operated safety relief valve mounted on a pressure vessel[J]. Energy conversion and management, 2014, 81(5): 407-419.[11]SONG X G, WANG L, PARK Y C. Transient analysis of a spring-loaded pressure safety valve using computational fluid dynamics(CFD)[J]. Journal of pressure vessel technology, 2010, 132(5): 054501.[12]SONG X G, WANG L, PARK Y C. Analysis and optimization of a butterfly valve disc[J]. Proceedings of the institution of mechanical engineers, part e: Journal of process mechanical engineering, 2009, 223(2): 81-89.[13]SAHA B K, CHATTOPADHYAY H, MANDAL P B, et al. Dynamic simulation of a pressure regulating and shut-off valve[J]. Computers and fluids, 2014, 101: 233-240.[14]李树勋, 胡建华, 李连翠, 等. 先导式疏水阀阀芯组件动力特性分析[J]. 江苏大学学报(自然科学版), 2013, 34(6): 643-649. LI Shuxuan, HU Jianhua, LI Liancui, et al. Dynamic characteristic analysis of a pilot-operated steam trap valve plug components[J].Journal of Jiangsu University(natural science edition), 2013, 34(6): 643-649.(in Chinese)[15]赵建华, 高殿荣. 基于流量控制阀的液体静压导轨动态特性分析[J]. 中国机械工程, 2013, 24(4): 444-451. ZHAO Jianhua, GAO Dianrong. Dynamic characteristics analysis of liquid hydrostatic slide based on flow control valve[J]. China mechanical engineering, 2013, 24(4): 444-451.(in Chinese)[16] 陶国庆, 刘建峰, 张绍华, 等. 迷宫式调节阀流量特性的数值模拟[J]. 流体机械, 2014, 42(11): 50-53.
Tao G, Liu J, Zhang S, et al. Numerical Simulation on Flow Character of Labyrinth Type Regulating Valve[J]. Fluid Machinery 2014, 42(11): 50-53. (in Chinese)
[17] 郭崇志, 幸莎. 安全阀开启过程的瞬态模拟与试验验证[J]. 高校化学工程学报, 2014, 2: 029.
Guo C, Xing S. Transient simulation and experimental verification on safety valve opening processes[J]. Journal of Chemical Engineering of Chinese Universities, 2014, 2: 029. (in Chinese)
[18] Xu B, Ding R, Zhang J, et al. Modeling and dynamic characteristics analysis on a three-stage fast-response and large-flow directional valve[J]. Energy Conversion and Management, 2014, 79: 187-199.
[19] 王建凯, 金志江, 匡继勇, 等. 一种带先导球阀的截止阀[J]. 阀门, 2009 (3): 10-11.
Wang J, Jin Z, Kuang J. A new kind of globe valve with pilot ball valve[J]. Valve, 2009 (3): 10-11. (in Chinese)
[20] 张含, 匡继勇, 王建凯, 等. 基于 UDFs 程序的先导式截止阀启闭特性数值分析[J]. 轻工机械, 2011, 29(2): 10-13.
Zhang H, Kuang J, Wang J, et al. Characteristics numerical analysis for open and close feature of a pilot-controlling cut-off valve based on UDFs program[J]. Light Industry Machinery, 2011, 29(2), 10-13. (in Chinese)
[21] Qian J, Wei L, Jin Z, et al. CFD analysis on the dynamic flow characteristics of the pilot-control globe valve[J]. Energy Conversion and Management, 2014, 87: 220-226.
[22] Botros K K. Spring stiffness selection criteria for nozzle check valves employed in compressor stations[J]. Journal of Engineering for Gas Turbines and Power, 2011, 133(12): 1224 |
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