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An Experimental Study of Influence of the Steam Injection on the Profile Surface on the Turbine Nozzle Cascade Performance

[+] Author Affiliations
Vladimir Gribin, Aleksandr Tishchenko, Victor Tishchenko, Ilya Gavrilov, Sergey Khomiakov, Vitalij Popov

Moscow Power Engineering Institute, Moscow, Russia

Alexander Lisyanskiy, Konstantin Usachev

Power Mashines, OJSC, Saint Petersburg, Russia

Alexander Nekrasov, Vladimir Nazarov

Power Machines, OJSC, Saint Petersburg, Russia

Paper No. GT2014-27118, pp. V01BT27A050; 8 pages
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4558-5
  • Copyright © 2014 by ASME


The paper presents the results of experiments on the effect of steam injection on the performance of the wet steam turbine nozzle cascade. The steam injection destroys a liquid film on the surface of the blade and reduces erosion and dangerous droplets after cascade. The results obtained in the vane package cascade which include a slot on the concave surface of the airfoil near the trailing edge of blades. Experimental studies were carried out on wet and superheated steam. A pneumatic measurement system was used to determine the parameters of the main and injection steam. A laser diagnostics system “POLIS” that includes PIV/PTV was used to analyze the impact of heating steam injection on the characteristics of the liquid phase. Profile losses were obtained at different steam parameters and steam injection speeds. The characteristics of the liquid phase behind the trailing edge were obtained in a wide range of operating parameters.

Copyright © 2014 by ASME



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