Publication detail

Droplets deposition in steam piping connecting steam generator and steam turbine in nuclear plant

KATOLICKÝ, J. JÍCHA, M. MAREŠ, R.

Original Title

Droplets deposition in steam piping connecting steam generator and steam turbine in nuclear plant

English Title

Droplets deposition in steam piping connecting steam generator and steam turbine in nuclear plant

Type

journal article - other

Language

en

Original Abstract

A numerical investigation is carried out for turbulent droplet-laden flow of saturated steam produced in a steam generator (SG) that feeds steam turbine (ST) through a long and multi-bend steam piping. The main purpose of the study is to analyze deposition of droplets that form a wall film in the piping system. Commercial CFD code StarCD is used for the solution of turbulent flow field of droplet-laden steam. Turbulence is treated using k-omega model of turbulence. Wall film formation is solved by additional conservation equations. Two tasks were performed: parametric study of the deposition in a 90 degrees elbow positioned with different orientation and the deposition in a more complex piping system. This system starts with outlets from steam generator with five mouthpieces leading to a collector pipe and connecting the steam piping leading to a steam turbine. The steam piping consists of three straight segments of pipes and two 90 degrees elbows in the total length 17 m. The diameter of the steam piping is 0.425 m. Results of the simulations show where droplets deposit and where a liquid separator should be placed to drain away the water film and to avoid droplets from entering the steam turbine.

English abstract

A numerical investigation is carried out for turbulent droplet-laden flow of saturated steam produced in a steam generator (SG) that feeds steam turbine (ST) through a long and multi-bend steam piping. The main purpose of the study is to analyze deposition of droplets that form a wall film in the piping system. Commercial CFD code StarCD is used for the solution of turbulent flow field of droplet-laden steam. Turbulence is treated using k-omega model of turbulence. Wall film formation is solved by additional conservation equations. Two tasks were performed: parametric study of the deposition in a 90 degrees elbow positioned with different orientation and the deposition in a more complex piping system. This system starts with outlets from steam generator with five mouthpieces leading to a collector pipe and connecting the steam piping leading to a steam turbine. The steam piping consists of three straight segments of pipes and two 90 degrees elbows in the total length 17 m. The diameter of the steam piping is 0.425 m. Results of the simulations show where droplets deposit and where a liquid separator should be placed to drain away the water film and to avoid droplets from entering the steam turbine.

Keywords

VERTICAL ANNULAR-FLOW; ENTRAINMENT; MODEL

RIV year

2007

Released

01.08.2007

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE, SWITZERLAND

Pages from

1534

Pages to

1549

Pages count

16

BibTex


@article{BUT44082,
  author="Jaroslav {Katolický} and Miroslav {Jícha} and Radim {Mareš}",
  title="Droplets deposition in steam piping connecting steam generator and steam turbine in nuclear plant",
  annote="A numerical investigation is carried out for turbulent droplet-laden flow of saturated steam produced in a steam generator (SG) that feeds steam turbine (ST) through a long and multi-bend steam piping. The main purpose of the study is to analyze deposition of droplets that form a wall film in the piping system. Commercial CFD code StarCD is used for the solution of turbulent flow field of droplet-laden steam. Turbulence is treated using k-omega model of turbulence. Wall film formation is solved by additional conservation equations. Two tasks were performed: parametric study of the deposition in a 90 degrees elbow positioned with different orientation and the deposition in a more complex piping system. This system starts with outlets from steam generator with five mouthpieces leading to a collector pipe and connecting the steam piping leading to a steam turbine. The steam piping consists of three straight segments of pipes and two 90 degrees elbows in the total length 17 m. The diameter of the steam piping is 0.425 m. Results of the simulations show where droplets deposit and where a liquid separator should be placed to drain away the water film and to avoid droplets from entering the steam turbine.",
  address="ELSEVIER SCIENCE SA",
  chapter="44082",
  institution="ELSEVIER SCIENCE SA",
  journal="NUCLEAR ENGINEERING AND DESIGN",
  number="14",
  volume="237",
  year="2007",
  month="august",
  pages="1534--1549",
  publisher="ELSEVIER SCIENCE SA",
  type="journal article - other"
}