Improvement in a Control Valve Geometry by CFD Techniques

Palau-Salvador, Guillermo; González-Altozano, Pablo; Peralta, Ibán Balbastre; Arviza-Valverde, Jaime

doi:10.1061/40800(180)16

Cited by 6 publications

(5 citation statements)

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“…In recent years, CFD models have been applied for solving several hydraulic engineering problems. In this way, CFD has been used for a variety of purposes, as simulations of flow transient in pipes [19,20], behaviour of different control valves under different conditions [21][22][23][24], mixing models in water distribution systems [25][26][27][28], or for the characterization of elements in open channels [29][30][31][32][33][34].…”

Section: Computational Fluid Dynamics (Cfd) Modellingmentioning

confidence: 99%

Computational Determination of Air Valves Capacity Using CFD Techniques

García-Todolí

Iglesias-Rey

Mora-Meliá

et al. 2018

Water

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The analysis of transient flow is necessary to design adequate protection systems that support the oscillations of pressure produced in the operation of motor elements and regulation. Air valves are generally used in pressurized water pipes to manage the air inside them. Under certain circumstances, they can be used as an indirect control mechanism of the hydraulic transient. Unfortunately, one of the major limitations is the reliability of information provided by manufacturers and vendors, which is why experimental trials are usually used to characterize such devices. The realization of these tests is not simple since they require an enormous volume of previously stored air to be used in such experiments. Additionally, the costs are expensive. Consequently, it is necessary to develop models that represent the behaviour of these devices. Although computational fluid dynamics (CFD) techniques cannot completely replace measurements, the amount of experimentation and the overall cost can be reduced significantly. This work approaches the characterization of air valves using CFD techniques, including some experimental tests to calibrate and validate the results. A mesh convergence analysis was made. The results show how the CFD models are an efficient alternative to represent the behavior of air valves during the entry and exit of air to the system, implying a better knowledge of the system to improve it.

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Section: Computational Fluid Dynamics (Cfd) Modellingmentioning

confidence: 99%

Computational Determination of Air Valves Capacity Using CFD Techniques

García-Todolí

Iglesias-Rey

Mora-Meliá

et al. 2018

Water

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“…The improvement of the computational fluid dynamics and computer technology can make the numerical simulation method to study the complex flow problems possible. The numerical simulation method can not only save a lot of manpower and money, but also can simulate and show the change and distribution of internal flow parameters of the control valve which is worked in high temperature and high pressure condition, especially can be acquire detail information in the full load range of steam flow rate [2][3][4]. Unreasonable flow boundary can cause fluid flow to be not controlled, outward diffusion and increasing of the turbulent flow can cause unstable steam flow [5][6].…”

Section: Prefacementioning

confidence: 99%

Numerical Simulation of Flow in Imported Steam Turbine Inlet Components with Equilibrated Holes in High Performance

Shan¹,

Wu²,

Zhou³

et al. 2013

AMR

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The main inlet component of steam turbine is control valve. The stable operation of the steam turbine control valve is vital for safe and stable operation of the steam turbine and safety production of the power plant. However, due to the complexity of the structure and unsteady characteristics of steam flow in the valve, there is not enough experimental method about the detailed flow characteristics of the area near control valve disc and the inside of the valve chamber up to now. This article is to focus on the simulation of the steam turbine control valve interior flow field which includes the valve pre-inlet channel in different conditions, then find the reasons which caused instability and pressure loss of the control valve by analyzing the flow field details, finally further optimization design. The profile matching of the valve disc and valve seat has a great influence on the interior flow field of control valve, so analysis of the high performance valve disc shape and divergence angle of valve seat is carried out, and the research conclusion is used for guide design and development of the control valve.

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“…The lands of a spool divide the bore into two chambers, which are interconnected at the notches. The oil flows from one port (5) to the other (7), passing the notches at a high speed. The heat generated on the surface of the spool around the notches is conducted in the spool.…”

Section: Case Descriptionmentioning

confidence: 99%

“…These new efforts have coincided with the fast development of the computational calculations that allow us to use numerical methods for solving the complex flows. In this way, many research works have been carried out to analyse, simulate, and model valves using computational fluid dynamics * Corresponding author: Department [1], Nadarajah et al [2,3]), spool (Vaughan et al [4], Borghi et al [5]), butterfly (Huang and Kim [6]), and control valves (Palau-Salvador and Gonzalez-Altozano [7]) have recently been performed. The contributions by the present authors' group are also referred to in references [8] and [9].…”

Section: Introductionmentioning

confidence: 99%

“…In this way, many research works have been carried out to analyse, simulate, and model valves using computational fluid dynamics (CFD) techniques. For example, interesting studies on poppet (Ito et al [1], Nadarajah et al [2,3]), spool (Vaughan et al [4], Borghi et al [5]), butterfly (Huang and Kim [6]), and control valves (Palau-Salvador and Gonzalez-Altozano [7]) have recently been performed. The contributions by the present authors' group are also referred to in references [8] and [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An investigation of the temperature distributions inside a spool valve owing to a viscous heating effect

Deng

Shao

2009

Proceedings of the Institution of Mechanical Engineers, Part C:

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The objective of this article is a numerical analysis of the temperature distributions around the notches of a spool valve, because of the viscous heating effect caused by high-speed flow of the large-viscosity hydraulic oil. Two valve spools fabricated with different shapes of notches are investigated, of which spool A is an earlier one, being reported to cause a jam fault under specific working conditions. Spool B is an improved one, which has shown no evidence of damage from jamming in applications up to the present. However, except for practical application, no experimental or numerical tests have been carried out to support it. The deformation of the spool caused by viscous heating is very small, so it is difficult to be observed by conventional experimental methods. In this article, a numerical method is employed to uncover the flow field inside the valve as well as the temperature distributions on the valve spool. The results show important differences between spool A and spool B, including local temperature distributions and peak temperatures around the notches. In conclusion, spool B is evaluated to be more reliable from jam faults than spool A. However, present studies are limited to computational fluid dynamics analysis, which restricts studies on flow and heat transfer. More reliable predictions will be made in the future.

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Improvement in a Control Valve Geometry by CFD Techniques

Cited by 6 publications

References 0 publications

Computational Determination of Air Valves Capacity Using CFD Techniques

Computational Determination of Air Valves Capacity Using CFD Techniques

Numerical Simulation of Flow in Imported Steam Turbine Inlet Components with Equilibrated Holes in High Performance

An investigation of the temperature distributions inside a spool valve owing to a viscous heating effect

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