Instrumentation for wet steam

Kleitz, Alain; Dorey, Jean-Marc

doi:10.1243/0954406041474192

Cited by 23 publications

(13 citation statements)

References 12 publications

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“…There are a number of methods to determine steam wetness [12,13], however, in those cases where not only the global steam quality but also rather local values (e.g., along the channel height within a turbine) and especially information about the size and number of droplets is needed, only optical methods are applicable. At ITSM, the light extinction method is used for this purpose.…”

Section: E Th O D O F M Easurem Entmentioning

confidence: 99%

Two-Phase Flow Modeling and Measurements in Low-Pressure Turbines—Part II: Turbine Wetness Measurement and Comparison to Computational Fluid Dynamics-Predictions

Schatz

Eberle

Grübel

et al. 2014

Journal of Engineering for Gas Turbines and Power

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T w o -P h a s e F lo w M o d e lin g andM e a s u re m e n ts in L o w -P re s s u re T u rb in e s -P art II: T u rb in e W e tn e s s M e a s u re m e n t and C o m p ariso n to C o m p u ta tio n a l F luid D y n a m ic s -P re d ic tio n s The correct computation o f steam subcooling, subsequent formation o f nuclei and finally droplet growth is the basic prerequisite fo r a quantitative assessment o f the wetness losses incurred in steam turbines due to thermal and inertial relaxation. The same basi cally applies fo r the prediction o f droplet deposition and the resulting threat o f erosion. Despite the fa ct that there are many computational fluid dynamics (CFD)-packages that can deal with real-gas effects in steam flows, the accurate and reliable prediction o f sub cooling, condensation, and wet steam flow in steam turbines using CFD is still a demand ing task. One reason fo r this is the lack o f validation data fo r turbines that can be used to assess the physical models applied. Experimental data from nozzle and cascade tests can be found in the open literature; however, these measurement results are only partly useful fo r validation purposes fo r a number o f reasons. With regard to steam turbine test data, there are some publications, yet always without any information about the turbine stage geometries. This publication is part o f a two-part paper; whereas Part I focuses on the numerical validation o f wet steam models by means o f condensing nozzle and cascade flows, the focus in this part lies on the comparison o f CFD results o f the turbine flow to experimental data at various load conditions. In order to assess the validity and reliability o f the experimental data, the method o f measurement is presented in detail and dis cussed. The comparison o f experimental and numerical results is used fo r a discussion about the challenges in both modeling and measuring steam turbine flows, presenting the current experience and knowledge at Institute o f Thermal Turbomachinery and Machin ery Laboratory (ITSM).

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Section: E Th O D O F M Easurem Entmentioning

confidence: 99%

Two-Phase Flow Modeling and Measurements in Low-Pressure Turbines—Part II: Turbine Wetness Measurement and Comparison to Computational Fluid Dynamics-Predictions

Schatz

Eberle

Grübel

et al. 2014

Journal of Engineering for Gas Turbines and Power

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“…This is a good explanation of why so many papers on the expansion of wet-steam through steam turbines were published in that period [11]. The main problem was how to calculate steam enthalpy in the flow path, as only the properly measured parameters were pressure and temperature [12].…”

Section: Introductionmentioning

confidence: 99%

Thermal balance of wet-steam turbines in nuclear power plants: A case study

Álvarez-Fernández

Portillo

Alonso-Tristán

2016

Applied Thermal Engineering

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“…This technique was applied for determining the droplet size distribution function and for estimating the velocity field of the coarse droplets [3]. There are several advantages of the new method in comparison with previously used methods [4]. The photogrammetric method can be applied for measurements at low droplet number densities.…”

Section: Introductionmentioning

confidence: 99%

A detection of the coarse water droplets in steam turbines

Bartoš

Cai

Kolovratník

2014

EPJ Web of Conferences

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The aim of this paper is to introduce a novel method for the detection of coarse water droplets in a low pressure part of steam turbines. The photogrammetry method has been applied for the measurement of coarse droplets in the low-pressure part of a steam turbine. A new probe based on this measurement technique was developed and tested in the laboratory and in a steam turbine in the Poþerady power-plant. The probe was equipped with state-of-the-art instrumentation. The paper contains results from laboratory tests and the first preliminary measurements in a steam turbine. Possible applications of this method have been examined.

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Instrumentation for wet steam

Cited by 23 publications

References 12 publications

Two-Phase Flow Modeling and Measurements in Low-Pressure Turbines—Part II: Turbine Wetness Measurement and Comparison to Computational Fluid Dynamics-Predictions

Two-Phase Flow Modeling and Measurements in Low-Pressure Turbines—Part II: Turbine Wetness Measurement and Comparison to Computational Fluid Dynamics-Predictions

Thermal balance of wet-steam turbines in nuclear power plants: A case study

A detection of the coarse water droplets in steam turbines

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