Numerical solution of 2D wet steam flow with non-equilibrium condensation and real thermodynamics

The paper concerns with the numerical modeling of wet steam flow through a blade cascade in transonic regime with non-equilibrium condensation in 2D. Real thermodynamics of vapor phase is implemented in the way which mostly avoid iterations in order to calculate thermodynamic properties. This equation of state is represented by the function for non-dimensional entropy with independent variables scaled density and scaled internal energy. Other equations of state are used for comparison, namely special gas equation which comes from IAPWS-95 formulation and simple pseudo perfect gas relation. We applied simple homogeneous non-equilibrium approach to model two-phase flow. Laminar compressible Navier-Stokes system of equations is used for the mixture properties. Liquid phase is described by the standard method of moments of droplet number distribution function. We consider obtained numerical results to be in good agreement with the measured data. We note the fact that robust and accurate closure of supplementary liquid system (nucleation rate and droplet growth model) is still not available and most often ad-hoc corrections are proposed by the authors. Results show differences among used equations of state as well. This is apparent mainly in the vicinity of condensation shock region on the suction side.

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Non-equilibrium condensation of wet steam flow within high-pressure thermo-compressor

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2015.02.023 ◽

2015 ◽

Vol 81 ◽

pp. 74-82 ◽

Cited By ~ 17

Author(s):

S.M.A. Noori Rahim Abadi ◽

R. Kouhikamali ◽

K. Atashkari

Keyword(s):

High Pressure ◽

Steam Flow ◽

Wet Steam ◽

Wet Steam Flow ◽

Non Equilibrium

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Wet steam flow and condensation loss in turbine blade cascades

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.116748 ◽

2021 ◽

Vol 189 ◽

pp. 116748

Author(s):

Chuang Wen ◽

Yan Yang ◽

Hongbing Ding ◽

Chunqian Sun ◽

Yuying Yan

Keyword(s):

Turbine Blade ◽

Steam Flow ◽

Wet Steam ◽

Wet Steam Flow

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A fast response miniature probe for wet steam flow field measurements

Measurement Science and Technology ◽

10.1088/0957-0233/27/12/125901 ◽

2016 ◽

Vol 27 (12) ◽

pp. 125901

Author(s):

Ilias Bosdas ◽

Michel Mansour ◽

Anestis I Kalfas ◽

Reza S Abhari

Keyword(s):

Flow Field ◽

Field Measurements ◽

Fast Response ◽

Steam Flow ◽

Wet Steam ◽

Wet Steam Flow

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Some Experiments on Wet Steam Flow Visualization in Large Steam Turbine Blading

Journal of Fluids Engineering ◽

10.1115/1.3448403 ◽

1976 ◽

Vol 98 (3) ◽

pp. 573-577 ◽

Cited By ~ 1

Author(s):

J. Krzyz˙anowski ◽

B. Weigle

Keyword(s):

Steam Turbine ◽

Steam Flow ◽

Light Sources ◽

Phase Flow ◽

Wet Steam ◽

Experimental Conditions ◽

Advantages And Disadvantages ◽

Primary Droplet ◽

Last Stage ◽

Wet Steam Flow

In a series of experiments aimed at the visualization of the wet steam flow in the exhaust part of a 200 MW condensing steam turbine a set of periscopes and light sources was used. The aim of the experiment was: 1 – The investigation of the liquid-phase flow over the last stage stator blading of the turbine mentioned. 2 – The investigation of the gaseous-phase flow through the last stage blading at full and part load. The first part of the program partially failed due to the opaqueness of the wet steam atmosphere for the turbine load higher than 10–20 MW. The detailed experimental conditions will be described. An assessment of the primary droplet size will also be given. The preliminary results of the second part of the program will be outlined. The advantages and disadvantages of the equipment used will be discussed.

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