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RESEARCH PAPER

Experimental Investigation of Flow Structure and Nusselt Number in a Low-Speed Linear Blade Passage With and Without Leading-Edge Fillets

[+] Author and Article Information
G. I. Mahmood, R. Gustafson, S. Acharya

Turbine Innovation and Energy Research (TIER) Center, Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803

J. Heat Transfer 127(5), 499-512 (May 25, 2005) (14 pages) doi:10.1115/1.1865218 History: Received April 07, 2004; Revised November 12, 2004; Online May 25, 2005
Copyright © 2005 by ASME
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References

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Figures

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Normalized axial vorticity ωxC/Uref and pitchwise velocity W/Uref in a pitchwise normal plane at XG/Cax=0.215 for the baseline
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Normalized axial vorticity component ωxC/Uref in a pitchwise normal plane at XG/Cax=0.215 with fillets
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Schematic of the experimental test facility
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Coordinate system and measurement locations employed in the test section
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Profile geometry and shape of the four types of fillets
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Flow visualization images of secondary flows in the stagnation-line plane with and without fillets
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Flow visualization images of secondary flows in a pitchwise normal plane at XG/Cax=0.05 with and without fillets
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Flow visualization images of secondary flows in a pitchwise normal plane at XG/Cax=0.285 with and without fillets
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Normalized pitchwise velocity component W/Uref in a pitchwise normal plane at XG/Cax=0.215 with fillets
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EW Nusselt number distributions for fillet 2 (EW)
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EW Nusselt number distributions for fillet 3 (B)
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EW Nusselt number distributions for fillet 4 (curved EW&B)
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EW Nu distributions in pitchwise direction and at different axial locations for baseline and fillets. Symbol legends are shown in Fig. 21.
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Pitchwise-averaged EW Nusselt number distributions in axial direction for baseline and fillets
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Total pressure loss coefficient Cpt,loss in a pitchwise normal plane at XG/Cax=1.071 for the baseline
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Total pressure loss coefficient Cpt,loss in a pitchwise normal plane at XG/Cax=1.071 with the fillets
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Streamwise turbulence intensity distribution in spanwise direction at pitchwise passage middle position and at different axial locations with and without fillets
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Streamwise normalized velocity Vs/Uref distribution in spanwise direction at pitchwise passage middle position and at difference axial locations with and without fillets. Legends for the symbols are shown in Fig. 12.
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Surface static pressure coefficient Cp distributions along the blade surface at Y/S=0.33 with and without the fillets
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EW Nusselt number distributions for baseline
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EW Nusselt number distributions for fillet 1 (EW&B)

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