Numerical investigation of effects polydispersed droplets on the erosion rate and condensation loss in the wet steam flow in the turbine blade cascade

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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Losses estimation in transonic wet steam flow through linear blade cascade

Journal of Thermal Science ◽

10.1007/s11630-015-0762-6 ◽

2015 ◽

Vol 24 (2) ◽

pp. 109-116 ◽

Cited By ~ 16

Author(s):

Sławomir Dykas ◽

Mirosław Majkut ◽

Michał Strozik ◽

Krystian Smołka

Keyword(s):

Steam Flow ◽

Wet Steam ◽

Blade Cascade ◽

Flow Through ◽

Wet Steam Flow

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Numerical investigation on the self-excited oscillation of wet steam flow in a supersonic turbine cascade

Progress in Natural Science Materials International ◽

10.1080/10020070612330099 ◽

2006 ◽

Vol 16 (9) ◽

pp. 988-992 ◽

Cited By ~ 2

Author(s):

Li Liang ◽

Sun Xiuling ◽

Li Guojun ◽

Feng Zhenping

Keyword(s):

Numerical Investigation ◽

The Self ◽

Steam Flow ◽

Turbine Cascade ◽

Wet Steam ◽

Excited Oscillation ◽

Wet Steam Flow

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Study of the wet steam flow in the blade tip rotor linear blade cascade

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2017.12.022 ◽

2018 ◽

Vol 120 ◽

pp. 9-17 ◽

Cited By ~ 20

Author(s):

Sławomir Dykas ◽

Mirosław Majkut ◽

Krystian Smołka ◽

Michał Strozik

Keyword(s):

Steam Flow ◽

Wet Steam ◽

Blade Cascade ◽

Blade Tip ◽

Wet Steam Flow

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The Influence of Wet-Steam Flow Electrization on the Surface Strength of Turbine Blade Materials

Thermal Engineering ◽

10.1134/s0040601520010073 ◽

2020 ◽

Vol 67 (1) ◽

pp. 60-67

Author(s):

A. A. Tarelin ◽

N. V. Surdu ◽

A. V. Nechaev

Keyword(s):

Turbine Blade ◽

Steam Flow ◽

Wet Steam ◽

Surface Strength ◽

Wet Steam Flow

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Numerical Solution of Transonic Wet Steam Flow in Blade-to-Blade Cascade with Non-equilibrium Condensation and Real Thermodynamics

EPJ Web of Conferences ◽

10.1051/epjconf/20159202025 ◽

2015 ◽

Vol 92 ◽

pp. 02025 ◽

Cited By ~ 1

Author(s):

Vladimír Hric ◽

Jan Halama

Keyword(s):

Numerical Solution ◽

Steam Flow ◽

Wet Steam ◽

Blade Cascade ◽

Wet Steam Flow ◽

Non Equilibrium

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Features of liquid phase movement in the inter-blade channel of nozzle blade cascade

Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy ◽

10.1177/0957650917730947 ◽

2017 ◽

Vol 232 (5) ◽

pp. 452-460 ◽

Cited By ~ 7

Author(s):

Vladimir Gribin ◽

Ilya Gavrilov ◽

Aleksandr Tishchenko ◽

Victor Tishchenko ◽

Vitaliy Popov ◽

...

Keyword(s):

Numerical Simulation ◽

Laser Diagnostics ◽

Experimental Studies ◽

Correlation Method ◽

Leading Edge ◽

Steam Flow ◽

Wet Steam ◽

Blade Cascade ◽

Wet Steam Flow ◽

Nozzle Blade

The experimental results of wet steam flow in the blade channel of flat nozzle blade cascade have been considered in the paper. The aim of this work is to study the motion of liquid droplets inside the inter-blade channel. Experimental studies were performed on installation circuit of wet steam. In order to obtain velocity fields of droplets in investigated channel, the laser diagnostics system was used. It carries out the cross-correlation method—particle tracking velocimetry. Numerical simulation of wet steam flow in studied channel was performed. According to the obtained data, the main features of the droplets motion in the blade channel have been revealed. Basic droplets streams and the sources of their appearance have been determined. The process of deposition and breakdown of the droplets on the surface of the blades have been studied. It is shown that reflected region of droplets (“fountain”) is formed around the leading edge. The experimental data were compared with the results of numerical simulation of the droplets motion in the flat nozzle blade cascade.

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