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Author(s)

     Derek Lastiwka, Dongil Chang, Stavros Tavoularis

Title

     Effects of Rotor Blade Scaling on High-Pressure Turbine Unsteady Loading

Publication Name

     International Journal of Turbo & Jet-Engines

Publication Type

     Journal
Publisher
     
Place
     
Editor(s)
     
Number
     
School
     
Volume
      30
Chapter
     
Pages
      43-54
Other Publication Information
     
Publication Year
     2013
Abstract
     The present work is a study of the effects of rotor blade scaling of a single-stage high pressure turbine on the time-averaged turbine performance and on parameters that influence vibratory stresses on the rotor blades and stator vanes. Three configurations have been considered: a reference case with 36 rotor blades and 24 stator vanes, a case with blades upscaled by 12.5%, and a case with blades downscaled by 10%. The present results demonstrate that blade scaling effects were essentially negligible on the time-averaged turbine performance, but measurable on the unsteady surface pressure fluctuations, which were intensified as blade size was increased. In contrast, blade torque fluctuations increased significantly as blade size decreased. Blade scaling effects were also measurable on the vanes.
Keywords
     high-pressure turbine, blade scaling, CFD
Website
     http://www.degruyter.com/view/j/tjj
Paper Status
     Published
DOI / Publication ID
     10.1515/tjj-2012-003



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