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TECHNICAL PAPERS

Flow Control of Rotating Stall in a Radial Vaneless Diffuser

[+] Author and Article Information
Hiromu Tsurusaki, Takahiro Kinoshita

  Department of Mechanical Engineering, Fukuyama University, Fukuyama, Hiroshima 729-0292 Japane-mail: htsu@fume.fukuyama-u.ac.jp

J. Fluids Eng 123(2), 281-286 (Dec 01, 2000) (6 pages) doi:10.1115/1.1351174 History: Received September 21, 1999; Revised December 01, 2000
Copyright © 2001 by ASME
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References

Tsurusaki,  H., , 1984, “Rotating Stall in a Vaneless Diffuser of a Centrifugal Fan (2nd Report, Instantaneous Flow Condition),” Turbomachinery,12, No. 6, pp. 323–332 (in Japanese).
Kinoshita,  Y., and Senoo,  Y., 1985, “Rotating Stall Induced in Vaneless Diffusers of Very Low Specific Speed Centrifugal Blowers,” ASME J. Eng. Gas Turbines Power, 107, No. 2, pp. 514–521.
Tsurusaki,  H. , 1987, “A Study on the Rotating Stall in Vaneless Diffusers of Centrifugal Fans,” JSME Int. J., 30, No. 260, pp. 279–287.
Abdelhamid,  A. N., 1987, “A New Technique for Stabilizing the Flow and Improving the Performance of Vaneless Radial Diffusers,” ASME J. Turbomach. , 109, No. 1, pp. 36–40.
Yoshida,  Y. , 1992, “Active Control of Vaneless Diffuser Rotating Stalls,” Trans. JSME , 58, No. 554, pp. 3067–3073 (in Japanese).
Kurokawa, J., et al., 1997, “A New Passive Control of Rotating Stall in Vaneless and Vaned Diffusers by Shallow Grooves,” Proceedings JSME International Conference on Fluid Engineering, Vol. 2, pp. 1109–1114.
Jansen,  W., 1964, “Rotating Stall in a Radial Vaneless Diffuser,” ASME J. Basic Eng., 86, No. 4, pp. 750–758.
Abdelhamid, A. N., 1980, “Analysis of Rotating Stall in Vaneless Diffusers of Centrifugal Compressors,” ASME Paper, 80-GT-184.
Frigne,  P., and Van den Braembussche,  R., 1985, “A Theoretical Model for Rotating Stall in the Vaneless Diffuser of a Centrifugal Compressor,” ASME J. Eng. Gas Turbines Power, 107, No. 2, pp. 507–513.
Imaichi, K., and Tsurusaki, H., 1979, “Rotating Stall in a Vaneless Diffuser of a Centrifugal Fan,” ASME Proceedings, Flow in Primary, Non-Rotating Passages in Turbomachines, pp. 23–31.

Figures

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Jet nozzle inserted in diffuser
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Measurement systems of pressure fluctuation (a) and of velocity fluctuation (b)
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Frequency spectra of pressure fluctuation. Uncertainty of data: f: ±0.125 Hz, ϕ: ±0.001, pressure amplitude: ±6%.
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(a) Nondimensional pressure amplitude and (b) rotational speed ratio of cells. Uncertainty of data: ϕ: ±0.001,p/ρu22:±6%,fr/fi: ±0.004 (1 cell), ±0.002 (2 cells), ±0.001 (3 cells).
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Dependence of control effect on jet direction (a) 2-cell component and (b) 3-cell component. Uncertainty of data: θ:±1 deg, p/ρu22:  ±6%.
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Dependence of control effect on jet position (a) 1-cell component, (b) 2-cell component, and (c) 3-cell component. Uncertainty of data: zj/b: ±0.03,p/ρu22: ±6%.
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Dependence of control effect on jet position. Uncertainty of data: zj/b: ±0.03,p/ρu22: ±6%.
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Dependence of control effect on flow coefficient (pressure fluctuation) (a) 2-cell component and (b) 3-cell component. Uncertainty of data: ϕ: ±0.001,p/ρu22: ±6%.
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Dependence of control effect on flow coefficient (velocity fluctuation). Uncertainty of data: ϕ: ±0.001,v/u2 :±6%.
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Dependence of control effect on flow coefficient (rotational speed ratio of cells). Uncertainty of data: ϕ: ±0.001,fr/fi: ±0.002.
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(a) Effect of jet on flow angle of main flow (calculated) and (b) effect of jet on peripheral velocity of main flow (calculated, r/r2=1.5)
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Effect of jet on performance of tested fan. Uncertainty of data: ϕ:  ±0.001,Δp/ρu22:  ±0.02.

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