A numerical investigation of two-phase steam flow around a 2-D turbine's rotor tip

Nikkhahi, Behnam; Shams, Mehrzad; Ziabasharhagh, Masoud

doi:10.1016/j.icheatmasstransfer.2009.03.004

Cited by 24 publications

(7 citation statements)

References 13 publications

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“…The following relation was proposed to determine the droplet temperature in terms of vapor temperature, supercooling degree and droplet radius [54]:…”

Section: = ( )mentioning

confidence: 99%

Numerical investigation of wet inflow in steam turbine cascades using NURBS-based mesh generation method

Ebrahimi-Fizik

Lakzian

Hashemian

2020

International Communications in Heat and Mass Transfer

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“…The following relation was proposed to determine the droplet temperature in terms of vapor temperature, supercooling degree and droplet radius [54]:…”

Section: = ( )mentioning

confidence: 99%

Numerical investigation of wet inflow in steam turbine cascades using NURBS-based mesh generation method

Ebrahimi-Fizik

Lakzian

Hashemian

2020

International Communications in Heat and Mass Transfer

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“…Dykas et al [7] highlighted the importance of using real gas model in simulation of transonic wet steam flows in order to obtain reasonable estimation for thermodynamic losses. More comprehensive results presented by Nikkhahi et al [8] portrayed the capability of Eulerian-Eulerian description of gaseous phase and water droplets in accurate prediction of pressure distribution around a 2D turbine's rotor tip. Wroblewski et al [9,10] proposed and validated a new theoretical treatment for heterogonous condensation of wet steam in the low pressure part of large power turbines for 2D and 3D turbine geometries when insoluble impurities like NaCl are present in the steam flow.…”

Section: Introductionmentioning

confidence: 99%

CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows

Abadi

Ahmadpour

Abadi

et al. 2017

Applied Thermal Engineering

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Highlights• CFD-based shape optimization of a nozzle and a turbine blade regarding nucleating steam flow is performed.• Nucleation rate and droplet radius are the best suited objective functions for the optimization p rocess.• Maximum 34% reduction in entropy generation rate is reported for turbine cascade.• A maximum 10% reduction in Baumann factor and a maximum 2.1% increase in efficiency is achieved for a turbine cascade. Abstract:In this study CFD-based shape optimization of a 3D nozzle and a 2D turbine blade cascade is undertaken in the presence of non-equilibrium condensation within the considered flow channels.A two-fluid formulation is used for the simulation of unsteady, turbulent, supersonic and compressible flow of wet steam accounting for relevant phase interaction between nucleated liquid droplets and continuous vapor phase. An in-house CFD code is developed to solve the governing equations of the two phase flow and was validated against available experimental

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“…Contemporary research works are focused on condensation modeling [24], numerical modeling and analysis of erosion parameters and their impact on blade surfaces, [15,26,27,32]. Based on erosion rates and particle models, all the erosion characteristics of first row blades in a supercritical steam turbine, was simulated and analyzed by threedimension numerical simulation method, [28].…”

Section: Introductionmentioning

confidence: 99%

Reliability of Turbine Blades in Wet Steam Conditions

2016

IJSR

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Blades of steam turbine are the most important element of energetic systems. Blades failure leads to various exploitation problems, efficiency decrease and economical losses, at all. The present research deals with study on erosion mechanisms in a low pressure stage of an industrial steam turbine. Aerodynamic behavior and efficiency of energy conversion, trajectories of water particles, reasons for occurrence of erosion wear and erosion of certain parts of the streamlined surfaces, are established and discussed. An approach to obtain incidence time to erosion appearance is implemented. Developed methodology and obtained results are applicable to determine erosion effects on streamed complex surfaces, to consider approaches to lower wetness in condensation turbines and prolong the reliability of blades operated in wet steam conditions.

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A numerical investigation of two-phase steam flow around a 2-D turbine's rotor tip

Cited by 24 publications

References 13 publications

Numerical investigation of wet inflow in steam turbine cascades using NURBS-based mesh generation method

Numerical investigation of wet inflow in steam turbine cascades using NURBS-based mesh generation method

CFD-based shape optimization of steam turbine blade cascade in transonic two phase flows

Reliability of Turbine Blades in Wet Steam Conditions

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