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Loss Coefficient Dependence of Turbine Blade Cascade

[+] Author Affiliations
Milan Matějka, Pavel Šafařík

Czech Technical University in Prague, Prague, Czech Republic

Martin Luxa, David Šimurda

Academy of Sciences of the Czech Republic, Prague, Czech Republic

Jaroslav Synáć

Škoda Power a.s., Pilsen, Czech Republic

Paper No. GT2010-22740, pp. 2237-2244; 8 pages
doi:10.1115/GT2010-22740
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4402-1 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

This paper presents the experimental results of aerodynamic research performed on a blade cascade representing the midsection of 1220 mm long rotor blades of the last stage of a large output steam turbine. The operational regime of the blade cascade is characterized by supersonic exit velocity. Isentropic exit Mach number M2is = 1.323. The experimental data analysis concerns pneumatic measurements to calculate the total pressure and the kinetic energy loss coefficients, and to evaluate them mainly with respect to the aperiodicity of the flow field. The flow structure is also studied on the basis of results obtained by means of optical methods, such as schlieren and interferometric methods.

Copyright © 2010 by ASME

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