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

YANG Qing-hai; HUANG Hong-yan; HAN Wan-jin

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Article Navigation > Applied Mathematics and Mechanics > 2002 > 23(8): 843-850

YANG Qing-hai, HUANG Hong-yan, HAN Wan-jin. 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[J]. Applied Mathematics and Mechanics, 2002, 23(8): 843-850.

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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

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

Received Date: 2001-05-08
Rev Recd Date: 2002-03-26
Publish Date: 2002-08-15

Abstract

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.
- turbine cascade,
- tip clearance,
- curving cascade,
- endwall and surface,
- topological structure

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References(7)

References

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