CTU Optical probes for liquid phase detection in the 1000 MW steam turbine

Kolovratník, Michal; Bartoš, Ondřej

doi:10.1051/epjconf/20159202035

Cited by 9 publications

(8 citation statements)

References 3 publications

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“…The motivation for the new wind tunnel assembly arises from the previous measurement [2] of the coarse droplets in the steam turbine under operational conditions. The measurement was performed in three steam turbines in the Czechia.…”

Section: Testing Facilitymentioning

confidence: 99%

“…A better understanding of the formation of coarse droplets and their properties may provide future enhancements for the steam turbine and other similar applications. Previous measurements of coarse droplets directly in the steam turbine made it necessary to build an experimental tunnel for the study of the formation of the droplets and their properties [2] in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

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A study of the coarse water droplets formation in the nozzle

Měšťanová

Bartoš

2019

EPJ Web Conf.

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The paper introduces the experimental results of the droplets formation for three different aqueous solutions. The new wind tunnel was built to study water droplets atomization from liquid films at high speed flow similar to that found in steam turbines. Liquid atomization is a widely studied problem for sprays and generally in the field of aerosol research. A similar phenomenon occurs in steam turbines but mainly with undesirable effects, the formed droplets from the film (coarse droplets) have a negative effect on the reliability and efficiency of the turbines due to the erosion and corrosion by the droplets impact on the leading edges of the blades. The new wind tunnel is equipped with classical pressure and temperature measurement systems for the determination of the initial condition in the settling chamber and measurement of the static pressure along the nozzle with a known profile. The photogrammetric method and light scattering are used to measure the diameter distribution of the droplets. The liquid film is made with an aqueous solution supplied on the symmetrical aerofoil NACA 0008. Different aqueous solutions were studied for different liquid surface tension effects.

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Section: Testing Facilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A study of the coarse water droplets formation in the nozzle

Měšťanová

Bartoš

2019

EPJ Web Conf.

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“…The motivation for building the new wind tunnel arises from the previous measurement [5] of coarse droplets in the steam turbine under operational conditions. The measurement was performed in three power stations in Czechia.…”

Section: Description Of the New Tunnelmentioning

confidence: 99%

An Experimental Study of the Coarse Droplets Formation

Bartoš¹,

Měšťanová²

2018

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The paper introduces the first results from a new steam/air wind tunnel built in order to study the coarse water droplets in steam turbines and their formation. The wind tunnel was designed with the aim to have a testing facility with similar flow conditions for the study of liquid films as found in steam turbines. The tunnel is equipped with common devices for the measurement of the flow and for the analysis of the diameter distribution of the droplets. Two measurements methods were used for the measurement of the droplets size, photogrammetry and light scattering. The liquid film is artificially produced on an airfoil placed in the nozzle and liquid is pumped by a dosing pump on the surface of the airfoil. Coarse droplets formed from the liquid films have a negative effect on the reliability and efficiency of the turbines due to the erosion and corrosion by the droplets impact on the leading edges of the blades.

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“…Optical methods use the phenomenon of wave weakening (in this case light over a wide range of wavelengths) by the associated scattering. One of the main techniques currently being developed in application for measurements in steam turbine channels by several significant research centers from Germany [17,24], China [4,5] or the Czech Republic [20] is the method based on light absorption, which uses in its basic form the theory of scattering Mie on spherical particles.…”

Section: Introductionmentioning

confidence: 99%

Identification of the liquid mass fraction content in the wet steam

et al. 2019

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The experimental research, initiated at the Institute of Power Engineering and Turbomachinery of the Silesian University of Technology at the end of the last century, created an opportunity to supplement knowledge about the phenomenon of steam flow with condensation, tested by numerical fluid mechanics by IMiUE employees. In parallel with the numerical work, significant progress has been made in experimental studies on thflow of wet steam. Recently, measuring techniques based on recording the phenomenon of extinction of light have been elaborated or improved. The basic value determined in the final stage in the experimental way was the contentof the liquid phase defined as the wetness fraction. The methodology of tests and experimental investigations was presented, as well as the applied and developed measurement systems. Next, some developed designs of X probe and their modifications are described. Article present also some examples of applications of the developed measurement techniques in application to experimental research conducted on wet steam in the IMiUE. Examples of comparison between experimental and numerical tests are also provided.

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CTU Optical probes for liquid phase detection in the 1000 MW steam turbine

Cited by 9 publications

References 3 publications

A study of the coarse water droplets formation in the nozzle

A study of the coarse water droplets formation in the nozzle

An Experimental Study of the Coarse Droplets Formation

Identification of the liquid mass fraction content in the wet steam

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