Transient simulation of valve core movement of pilot-control globe valve in vertical pipelines

Jinyuan Qian, Yinfa Zhu, Buzhan Liu, Anle Lu, Zhijiang Jin

Research output: Contribution to journalArticlepeer-review

6 Citations (SciVal)

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 using 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 times 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.

Original languageEnglish
Pages (from-to)51-56, 65
Number of pages6
JournalPaiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering
Volume34
Issue number1
DOIs
Publication statusPublished - 2016 Jan 28
Externally publishedYes

Subject classification (UKÄ)

  • Energy Engineering

Keywords

  • Pilot-control globe valve
  • Spring stiffness
  • Transient simulation
  • Valve core movement
  • Vertical pipeline

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