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Topology and vortex structures of a curving turbine cascade with tip clearance (I)—Experimental model and topological flow patterns on both endwalls and blade surfaces

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Abstract

By means of ink trace visualization of the flows in conventional straight, positively curved and negatively curved cascades with tip clearance, and measurement of the aerodynamic parameters in the transverse section, and by appling topology theory, the structures on both endwalls and blade surfaces were analyzed. Compared with conventional straight cascade, blade positive curving eliminates the separation line of the upper passage vortex and leads the secondary vortex to change from close separation to open separation, while blade negative curving effects merely the positions of singular points and the intensities and scales of vortex.

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Authors and Affiliations

  1. Academy of Energy Science and Engineering, Harbin Institute of Technology, P O Box 458, 150001, Harbin, P R China

    Yang Qing-hai Doctor, Huang Hong-yan & Han Wan-jin

Authors
  1. Yang Qing-hai Doctor
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  2. Huang Hong-yan
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  3. Han Wan-jin
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Additional information

Communicated by DAI Shi-qiang

Foundation items: 973 Project of China; the Doctoral Foundation of Education Ministry of China (EDAF24403003)

Biography: YANG Qing-hai (1969−)

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Qing-hai, Y., Hong-yan, H. & Wan-jin, H. Topology and vortex structures of a curving turbine cascade with tip clearance (I)—Experimental model and topological flow patterns on both endwalls and blade surfaces. Appl Math Mech 23, 948–957 (2002). https://doi.org/10.1007/BF02437800

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  • DOI: https://doi.org/10.1007/BF02437800

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