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TECHNICAL PAPERS

Suppression of Unstable Flow at Small Flow Rates in a Centrifugal Blower by Controlling Tip Leakage Flow and Reverse Flow

[+] Author and Article Information
Mashiro Ishida, Taufan Surana, Hironobu Ueki, Daisaku Sakaguchi

Department of Mechanical Systems Engineering, Graduate School of Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan

J. Turbomach 127(1), 76-83 (Feb 09, 2005) (8 pages) doi:10.1115/1.1811092 History: Received October 01, 2003; Revised March 01, 2004; Online February 09, 2005
Copyright © 2005 by ASME
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References

Ishida, M., Sakaguchi, D., Ueki, H., and Sun, Z., 1997, “Relationship Between Rotating Stall Inception and 3-D Flow Separation on Vaneless Diffuser Walls in Centrifugal Blowers,” Proc. of JSME International Conference on Fluid Engineering, JSME, Toyko, Paper No. 97-203, Vol. II, pp. 1097–1102.
Ishida,  M., and Sakaguchi,  D., 1997, “Behavior of Separation Ring on Shroud Casing Wall of a Centrifugal Blower (Visualization of Separation Ring by Oil Film Technique),” J. Visualization,117(64), pp. 46–50 (in Japanese).
Ueki,  H., Ishida,  M., Sakaguchi,  D., and Sun,  Z., 2000, “Suppression of Inducer Stall Based on Inlet Recirculation in a Centrifugal Blower (1st Report, Improvement in Stall Limit by Ring Groove Arrangement),” Trans. Jpn. Soc. Mech. Eng., Ser. B, 66(647), pp. 1706–1711 (in Japanese).
Sun, Z., Ishida, M., Sakaguchi, D., and Ueki, H., 1998, “Flow Analysis and Surge Suppression in a Centrifugal Blower,” Proc. of 3rd International Conference on Pumps and Fans, Tsinghua University Press, Beijing, pp. 204–214.
Ishida, M., Sun, Z., Sakaguchi, D., Ueki, H., and Masuzawa, C., 1999, “Numerical Analysis and Experimental Verification of Inlet Recirculation for Unstable Flow Suppression in a Centrifugal Blower,” Proc. of 3rd ASME/JSME Joint Fluid Engineering Symposium, Paper No. FEDSM99-6844.
Sun,  Z., Ishida,  M., Sakaguchi,  D., and Ueki,  H., 2000, “Suppression of Inducer Stall Based on Inlet Recirculation in a Centrifugal Blower (2nd Report, Numerical Analysis of Stall Suppression Effect),” Trans. Jpn. Soc. Mech. Eng., Ser. B, 66(647), pp. 1712–1718; (in Japanese).
Fisher, F. B., 1988, “Application of Map Width Enhancement Devices to Turbocharger Compressor Stages,” SAE Paper No. 880794.
Sun, Z., Ishida, M., and Masuzawa, C., 2000, “A Computational Study on Optimum Inducer Leading Geometry for Stall Suppression in a Centrifugal Blower,” ASME Paper No. FEDSM2000-11059.
Ishida, M., Sun, Z., Taufan S., and Sakaguchi, D., 2002, “Numerical Investigation of Inducer Stall at Small Flow Rates in a Centrifugal Blower (Effect of Blade Leading Shape on Flow Separation),” Proc. of 4th International Conference on Pumps and Fans (4th ICPF), China Science and Technology Press, Beijing, pp. 206–212.
Sun, Z., Taufan S., Ishida, M., and Ueki, H., 2002, “Numerical Simulation on Flow Separation Behavior in a Centrifugal Blower Under Time-Periodic Inflow Condition,” Proc. of 4th International Conference on Pumps and Fans (4th ICPF), China Science and Technology Press, Beijing, pp. 315–321.
Taufan, S., Ishida, M., Ueki, H., and Sakaguchi, D., 2002, “Effect of Inducer Blade Leading Shape on Unstable Flow Inception in a Centrifugal Blower (Comparison of Numerical Analysis and Experiment),” Proc. (CD-ROM) of 5th JSME-KSME Fluids Engineering Conference, JSME, Tokyo, OS16-4, Paper No. 2, pp. 1–6.
Furukawa,  M., Inoue,  M., Saiki,  K., and Yamada,  K., 1999, “The Role of Tip Leakage Vortex Breakdown in Compressor Rotor Aerodynamics,” ASME J. Turbomach., 121(3), pp. 469–480.
Furukawa, M., Saiki, K., Yamada, K., and Inoue, M., 2000, “Unsteady Flow Behavior Due to Breakdown of Tip Leakage Vortex in an Axial Compressor Rotor at Near-Stall Condition,” ASME Turbo Expo, Munich, Germany Paper No. 2000-GT-0666.
Abdelhamid, A. N., 1982, “Control of Self-Excited Flow Oscillations in Vaneless Diffuser of Centrifugal Compressor System,” ASME Paper No. 82-GT-188.
Fukushima,  Y., Nishida,  H., and Miura,  H., 1989, “Rotating Stall of Centrifugal Compressors,” Turbomach.,17(3), pp. 149–159 (in Japanese).
Senoo, Y., Hayami, H., and Ueki, H., 1983, “Low-Solidity Tandem-Cascade Diffusers for Wide-Flow-Range Centrifugal Blowers,” ASME Paper No. 83-GT-3.
Harada,  H., 1996, “Non-Surge Centrifugal Compressor With Variable Angle Diffuser Vanes,” Turbomach.,24(10), pp. 600–608 (in Japanese).
Kurokawa, J., Matsui, J., Kitahora, T., and Saha, L., 1997, “A New Passive Device to Control Rotating Stall in Vaneless and Vaned Diffusers by Radial Grooves,” Proc. of JSME Intl. Conf. on Fluid Engineering, Vol. II, JSME, Tokyo, Paper No. JSME ICFE-97-716, pp. 1109–1114.
Tsurusaki, H., and Kinoshita, T., 1999, “Flow Control of Rotating Stall in a Radial Vaneless Diffuser,” Proc. of 3rd ASME/JSME Joint Fluids Engineering Conference, ASME, New York, Paper No. FEDSM99-7199, pp. 1–6.
Ishida,  M., Sakaguchi,  D., and Ueki,  H., 2001, “Suppression of Rotating Stall by Wall Roughness Control in Vaneless Diffusers of Centrifugal Blowers,” ASME J. Turbomach., 123(1), pp. 64–72; also ASME Paper No. 2000-GT-0461.
Nishizawa,  T., and Takata,  H., 1999, “Numerical Study on Stall Flutter of A Compressor Cascade (1st Report, Numerical Method and Numerical Example),” Trans. Jpn. Soc. Mech. Eng., Ser. B, 65(635), pp. 2293–2300 (in Japanese); also ASME 94-GT-258.

Figures

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Meridional section of test blower with SG*=0.21 groove and be=15 or 10 [mm]
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Computational grid for test blower; STD casing with be=15 [mm]
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Computational grid for test blower; SG*=0.21 groove with be=15 [mm]
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Comparison of hub-to-shroud distribution of flow incidence (S*=0)
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Effect of through-flow rate on inlet recirculation flow and reverse flow; SG*=0.21 groove with be=10 [mm]
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Experimental characteristics of test blower; Comparison between STD casing with be=15 [mm], STD casing with be=10 [mm], and SG*=0.21 groove with be=10 [mm]
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Computational grid for test blower; SG*=0.21 groove with be=10 [mm] (R>1.2)
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Effect of diffuser width on hub-to-shroud velocity distribution at R=1.20; the design flow rate of ϕd=0.360
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Effect of diffuser width on pressure rise in vaneless diffuser at the design flow rate of ϕd=0.360
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Effect of through-flow rate on reverse flow zone in STD casing with be=10 [mm]
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Characteristics of test blower; comparison between be=15 and 10 [mm] in STD casing
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Computational grid for test blower; STD casing with be=10 [mm] (R>1.2)
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Effect of suction ring groove on tip leakage flow streak lines (ϕ=0.300). (a) Without ring groove and (b) With ring groove.
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Reverse flow zone in the impeller passage section of S*=0.395 downstream of inducer tip throat; Case of STD casing with be=15 [mm]: (a) ϕ=0.300, (b) ϕ=0.250, and (c) ϕ=0.205
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Contour lines of reverse flow zone on the surface of revolution of the midtip clearance space; case of impeller without inlet recirculation: (a) ϕ=0.300, (b) ϕ=0.250, and (c) ϕ=0.205
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Effect of through-flow rate on reverse flow zone and inlet recirculation flow zone: (a) STD casing and (b) SG*=0.21 groove
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Frequency power spectrum of wall static pressure at S*=0.49 (R=0.74); comparison between STD casing and SG*=0.21 groove
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Experimental characteristics of test blower; comparison between STD casing and SG*=0.21 groove
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Numerical results of impeller characteristics ψS2 and inlet recirculation flow rate ϕIR
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Effect of ring-groove location on inlet recirculation flow zone in the ring-groove arrangement and reverse flow zones in the midpitch plane of impeller passage and vaneless diffuser: (a) ϕ=0.360 and (b) ϕ=0.250
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Variation of ring groove location: (a) SG*=0.31;s=19.2 [mm], (b) SG*=0.21;s=12.8 [mm], and (c) SG*=0.13;s=7.8 [mm]

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