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TECHNICAL PAPERS

Parametric Study of Tip Clearance—Casing Treatment on Performance and Stability of a Transonic Axial Compressor

[+] Author and Article Information
Behnam H. Beheshti, Bijan Farhanieh

School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran

Joao A. Teixeira, Paul C. Ivey

Turbomachinery, Icing and Gas Turbine Instrumentation Group, School of Engineering, Cranfield University, United Kingdom

Kaveh Ghorbanian

School of Aerospace Engineering, Sharif University of Technology, Tehran, Iran

J. Turbomach 126(4), 527-535 (Dec 29, 2004) (9 pages) doi:10.1115/1.1791643 History: Received October 01, 2003; Revised March 01, 2004; Online December 29, 2004
Copyright © 2004 by ASME
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References

Figures

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NASA Rotor 37 experimental and numerical reporting locations 3.
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Computational grid for NASA Rotor 37. (a) Meridional view, (b) main block (top view), and (c) second block.
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Pressure ratio and efficiency maps
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Spanwise distribution of total pressure at the passage exit (near stall condition)
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Spanwise distribution of total temperature at the passage exit
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Spanwise distribution of exit angle
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Pitchwise distribution of relative Mach number at 20% chord and 90% span
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Pitchwise distribution of relative Mach number after blade trailing edge and 90% span
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Blade relative Mach number at 95% span and peak efficiency. (a) Computations and (b) experiments 23.
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Effects of tip clearance size on compressor total pressure ratio and efficiency
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Effects of tip clearance size on compressor peak efficiency and total pressure ratio
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Effects of tip clearance size on compressor stall margin
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Effects of tip clearance size on compressor flow range
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Relative Mach number at 95% span and peak efficiency. (a) Small clearance, (b) medium clearance, and (c) large clearance.
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Contours of total pressure loss coefficient (ω) at 25% chord and peak efficiency. (a) Small clearance, (b) medium clearance, and (c) large clearance.
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Casing treatment configuration. (a) Location of vertical walls and (b) meridional view.
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Effects of casing treatment on compressor efficiency map. (a) Compressor pressure ratio and (b) compressor efficiency.
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Effects of casing treatment on compressor performance and stability. (a) Compressor efficiency and (b) compressor stability.
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Meridional view of normalized axial velocity at peak efficiency for large tip gap. (a) Smooth casing and (b) with casing treatment.
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Tip leakage vortex normalized vorticity (ξn) at 34, 45, 60, and 75% chord for large tip gap. (a) Smooth casing and (b) with casing treatments.

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