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Arabian Journal for Science and Engineering

, Volume 44, Issue 2, pp 959–970 | Cite as

Influence of a Circular Filter on Super-Critical Steam Flow Through Main Stop and Control Valves in a 1000 MW Super-Critical Power Plant

  • Liuliu ShiEmail author
  • Shichuan Yao
Research Article - Mechanical Engineering
  • 85 Downloads

Abstract

Influence of a circular filter on the aerodynamic characteristics of steam flow through the closely spaced main stop and control valves, which were used in a 1000 MW super-critical steam power plant (262 bar, 600 \(^{\circ }\)C) in south China, was numerically studied. A porous media model concerning the directivity of the pressure drop was applied to the circular filter; database of the dependence of the pressure drop on the superficial velocity was established by using computational fluid dynamics. The complex three-dimensional steam flow in the main stop and control valves was demonstrated to be well managed by the circular filter, through which the steam flow was straightened in the radial direction. As a result, the aerodynamic force exerted on the spindle of the main stop valve was greatly attenuated. However, the blockage of the filter to the steam flow was certain to increase the pressure loss in the main stop valve, whereas pressure loss in the control valve decreased due to the smoothened incoming flow. The dynamic behavior of the steam flow and the influence of the filter at different control valve openings have been studied as well. As the opening decreases, the flow velocity at the throat of the main control valve increases, and therefore, the pressure loss at the throat of the main control valve increases rapidly. The influence of the filter abates as the opening of the control valve drops.

Keywords

Filter Valves Porous media Computational fluid dynamics 

List of symbols

\(C_{ij} ,D_{ij}\)

Prescribed matrices

E

Total energy

\(G_k \)

Production of turbulence kinetic energy

k

Turbulence kinetic energy

\(k_{\mathrm{eff}} \)

Effective thermal conductivity

p

Pressure

\({\Delta } p\)

Pressure drop

\(S_i \)

Momentum source term

T

Temperature

\(u_i ,u_j ,u_l \)

Velocity components

\(v_\mathrm{mag} \)

Magnitude of the velocity

\(x_i \)

Cartesian coordinates

\(Y_M \)

Contribution of the fluctuating dilatation

\(\rho \)

Density

\(\mu \)

Viscosity

\(\mu _\mathrm{eff} \)

Effective viscosity

\(\mu _t \)

Turbulent viscosity

\(\varepsilon \)

Turbulence dissipation rate

\(\delta _{ij} \)

Kronecker tensor

\(({\tau _{ij}})_\mathrm{eff}\)

Deviatoric stress tensor

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Energy and Power EngineeringUniversity of Shanghai for Science and TechnologyShanghaiChina

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