Fluid Dynamics of a Pre-Swirl Rotor-Stator System

[+] Author and Article Information
Youyou Yan

Aero, Civil and Mechanical Engineering, City University, London, Northampton Square, London EC1V 0HB, UK  

Mahmood Farzaneh Gord, Gary D. Lock, Michael Wilson, J. Michael Owen

Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK

J. Turbomach 125(4), 641-647 (Dec 01, 2003) (7 pages) doi:10.1115/1.1578502 History: Received November 14, 2001; Revised January 25, 2003; Online December 01, 2003
Copyright © 2003 by ASME
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(a) A cover-plate pre-swirl system (reproduced from 1); (b) a direct-transfer pre-swirl system (reproduced from 5)
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Schematic diagram of the rotor-stator experimental rig (not to scale)
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140×211×40 computational grid—(a) 140×211 axial×radial grid (b) 211×40 radial×tangential grid
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Computed velocity vectors in two tangential planes for Reϕ=0.78×106T,p=0.236 and βp=0.96—(a) inlet nozzle midplane, (b) midway between nozzles
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Measured and computed radial variation of pressure, Reϕ=0.78×106—(a) static pressure at stator surface, (b) total pressure at axial midplane (z/s=0.5) measured computed (N=24) □ λT,p=0.127,βp≈0.52, N=24 [[dashed_line]] ▵ λT,p=0.236,βp≈0.96, N=24 – • λT,p=0.229,βp≈1.86, N=12 [[dotted_line]]
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Effect of βp and λT,p on measured and computed variation of β (z/s=0.5) measured computed (N=24)(Reϕ≈0.78×106,1.2×106)(Reϕ=0.78×106) □, ⧖ λT,p≈0.127,βp≈0.52, N=24 [[dashed_line]] ▵, + λT,p≈0.236,βp≈0.96, N=24 – •, × λT,p≈0.229,βp≈1.86, N=12 [[dotted_line]]
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Measured variation of β∞,b with βp ([[dashed_line]] Eq. (4a), – Eq. (4b))
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Measured variation of CD with (a) λT,p, (b) β∞,b



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