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Abstract

The direct air-cooling steam turbine has been more and more widely used due to global climatic change. For investigating the properties of the wet steam flow in an LP direct air-cooling steam turbine, measurements with an optical—pneumatic probe were carried out in a 300 MW turbine. Part 1 of this article presents the measurement results of wetness, size distribution of fine droplets, and other information. In this part, the flow field, including the yaw angle, pitch angle, Mach number, and velocity in different backpressures are presented. Due to higher backpressure, windage occurs much more in direct air-cooling steam turbines. The flow field and wetness in windage were investigated and measurement results are presented.

Keywords

low pressure steam turbine measurement wet steam flow field windage

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References

Cai

Ning

Niu

Song

, ‘Investigation of wet steam flow in a 300 MW direct air-cooling steam turbine. Part 1: Measurement principles, probe, and wetness’ Proc. IMechE, Part A: J. Power and Energy 223 A5 (2009): 625–634. DOI: 10.1243/09576509JPE690.

Seibold

Renner

Stetter

, ‘Examination of changes in wedge-probe characteristics when varying the boundary conditions’ In Proceedings of the. 14th Symposium on Measuring techniques in transonic and supersonic flows in casecades and turbomachines, Limerick, Ireland, 1998.

Broichhausen

K. D.

Fransson

, ‘European workshop on probe calibrations 1981–1983’ (Germany: Institut fuer Strahlantriebe, RWTH Aachen 1984) Mittleilung Nr. 84-02.

Moore

M. J.

Sieverding

C. H.

, Two-phase steam flow in turbines and separators: Theory, instrumentation, engineering (Washington: Hemisphere 1976).

Young

J. B.

, ‘The spontaneous condensation of steam in supersonic nozzles’ Phys. Chem. Hydrodyn. 3 1 (1982): 57–82.

Cai

X. S.

Wang

L. L.

Xin

Pan

Y. Z.

, ‘A novel integrated probe system for measuring the two-phase wet steam flow in steam turbines (in Chinese)’ J. Engng Thermophys. 22 6 (2001): 743–746.

, Experimental study of wet steam flow in a model steam turbine (in Chinese) (University of Shanghai for Science & Technology 2004) PhD Dissertation.

Cai

X. S.

, Light extinction particle sizing and its application in wet steam measurement (in Chinese) (1991) PhD Dissertation.

van de Hulst

H. C.

, Light scattering by small particles (New York: JohnWiley 1957).

10.

Wang

, The measurement techniques and experimental studies of wet steam flow in low pressure steam turbine (in Chinese) (University of Shanghai for Science & Technology 2003) PhD Dissertation.

11.

Wang

N. N.

Wei

J. M.

Cai

X. S.

, ‘Optical measurement of wet steam in turbines’ ASME J. Engng Gas Turbines Power 120 4 (1998): 867–871.

12.

Ren

Wang

S. Y.

Y. F.

, ‘The last stage blade for 600 MWsteam turbine with air-cooling condenser (in Chinese)’ Turbine Technol. 44 2 (2002): 103–105.

Investigation of wet steam flow in a 300 MW direct air-cooling steam turbine. Part 2: Flow field and windage

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References