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The Effect of Blade Curving on Flow Characteristics in Rectangular Turbine Stator Cascades With Different Incidences PUBLIC ACCESS

[+] Author Affiliations
Zhongqi Wang, Wanjin Han, Wenyuan Xu

Harbin Institute of Technology, Harbin, People’s Republic of China

Paper No. 91-GT-060, pp. V001T01A021; 7 pages
doi:10.1115/91-GT-060
From:
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7898-9
  • Copyright © 1991 by ASME

abstract

In a low speed plane cascade tunnel, the outlet flow fields and the static pressure distributions on blade surfaces of the turbine rectangular stator cascades with a small aspect ratio (s=0.68) were measured in detail. The experimental results show that the blade curving can form the negative gradient of static pressure along the blade height in the lower region of the cascade and the positive one in the upper region. This can lead to the reduction of the intensity of the streamwise vortices and the aerodynamic loading on both sides of the blades and the endwalls. Therefore, the end crosswise secondary flow losses are decreased considerably. The use of the curvilinear leaned blades can not only improve the flow characteristics in the stator cascades, but also provide good inlet conditions for rotor cascades.

Copyright © 1991 by ASME
This article is only available in the PDF format.

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