ANALYSIS OF THE STRUCTURE OF THE STEAM FLOW IN THE EXTRACTION AREA OF THE LOW-PRESSURE CYLINDER OF A 225 MW STEAM TURBINE WITH AN UPGRADED FLOW PATH

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J. of Mech. Eng., 2016, vol. 19, no. 1, pp. 3-8

DOI:  https://doi.org/10.15407/pmach2016.01.003

Journal Journal of Mechanical Engineering
Publisher A. Podgorny Institute for Mechanical Engineering Problems
National Academy of Science of Ukraine
ISSN 0131-2928 (Print), 2411-0779 (Online)
Issue Vol. 19, no. 1, 2016 (March)
Pages 3–8

 

Authors

M. Shimanyak, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences (14, Fiszera Str., Gdańsk 80-231, Poland), e-mail: masz@imp.gda.pl

A. Gardzilevich, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences (14, Fiszera Str., Gdańsk 80-231, Poland), e-mail: gar@imp.gda.pl

N. V. Pashchenko, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky Str., Kharkiv, 61046, Ukraine), e-mail:  nata.paschenko82@gmail.com

I. Yu. Nagornyy, A. Podgorny Institute of Mechanical Engineering Problems of NASU (2/10, Pozharsky Str., Kharkiv, 61046, Ukraine), e-mail: nagorniyiy@dtek.com

 

Abstract

A new design of the low-pressure cylinder is presented, which allows increasing the efficiency of the flow path of a steam turbine in the area of unregulated steam extraction. The cylinder upgrading is based on the use of a special ring, which directs the steam flow stream, formed by the intersection in the radial clearance of the rotor, directly into the heat exchanger through uncontrolled extraction. Experimental and computational studies have confirmed the advantages and effectiveness of the new design compared to the initial one, in which steam leakage from the radial gap entered the output stage.

 

Keywords: steam turbine, low-pressure cylinder, rotor, extraction chamber

 

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Received 15 January 2016