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TECHNICAL PAPERS

Numerical Investigation of Swirling Flow in Annular Diffusers With a Rotating Hub Installed at the Exit of Hydraulic Machines

[+] Author and Article Information
A. N. Kochevsky

Department of Fluid Mechanics, Sumy State University, 40007, Rimsky-Korsakov str., 2, Sumy, Ukraine

J. Fluids Eng 123(3), 484-489 (May 10, 2001) (6 pages) doi:10.1115/1.1385384 History: Received November 21, 2000; Revised May 10, 2001
Copyright © 2001 by ASME
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References

Howard, J. H. G. et al., 1967, ASME Paper, 67-WA/FE-21.
Kanemoto,  T., Toyokura,  T., and Kurokawa,  J., 1982, “Flow in Annular Diffuser,” 1st Report, Internal Flow and Performance, Bull. JSME, 25, No. 204, June, pp. 912–918.
Ji-jun,  Y., Zhao-gang,  Y., and Ming-de,  W., 1992, “On the Throughflow with Swirling Flow in Annular Diffuser,” Appl. Math. Mech., 13, No. 3, Shanghai, China, pp. 241–254.
Lohmann,  R. P., Markowski,  S. J., and Brookman,  E. T., 1979, “Swirling Flow Through Annular Diffusers With Conical Walls,” ASME J. Fluids Eng., 101, No. 2, pp. 224–229.
Agrawal, D. P., Singh, S. N., Sapre, R. N., and Malhotra, R. C., 1989, “Effect of hub rotation on the mean flow of wide angle annular diffusers,” HYDROTURBO 89, Vol. 1, pp. 231–240, Ostrava.
Singh,  S. N., Agrawal,  D. P., Sapre,  R. N., and Malhotra,  R. C., 1994, “Effect of inlet swirl on the performance of wide-angled annular diffusers,” Indian Journal of Engineering and Materials Sciences, 1, pp. 63–69.
Gosman, A. D., and Pun, W. M., 1974, “Calculation of Recirculation Flows,” Report HTS/74/2, Department of Mechanical Engineering, Imperial College.
Armfield, S. W., 1987, “Numerical Simulation of Incompressible Turbulent Swirling Flow in Conical Diffusers,” Ph.D. thesis, University of Sydney, Australia.
Armfield,  S. W., and Fletcher,  C. A. J., 1986, “Numerical simulation of swirling flow in diffusers,” Int. J. Numer. Methods Fluids, 6, pp. 541–556.
Clausen, P. D., 1987, “Measurements and predictions of swirling flow behind wind turbine blades and through an axisymmetric diffuser,” Ph.D. thesis, University of Newcastle, Australia.
Armfield, S. W., and Fletcher, C. A. J., 1986, “A Comparison of Single and Multi-Sweep Techniques for Reduced Navier-Stokes Equations,” Comp. Tech. and Appl. CTAC 85, pp. 431–442, Amsterdam, North Holland.
Armfield, S. W., and Fletcher, C. A. J., 1986, “Simulation of Internal Swirling Flow Using Mixing Length and k−ε Turbulence Models,” Proc. Int. Symp. Comp. Fluid Dyn. in Tokyo, pp. 740–751, Amsterdam, North Holland.
Cebeci, T., and Smith, A. O. M., 1974, Analysis of Turbulent Boundary Layers, Academic Press, New York.
Armfield,  S. W., and Fletcher,  C. A. J., 1985, “Application of the Dorodnitsyn finite element method to swirling boundary layer flow,” Int. J. Numer. Methods Fluids, 5, pp. 443–462.
Kwon,  O. K., Pletcher,  R. H., and Lewis,  J. P., 1984, “Prediction of Sudden Expansion Flows Using the Boundary-Layer Equations,” ASME J. Basic Eng., 106, pp. 285–291.
Parr,  O., 1963, “Untersuchungen der dreidimensionalen Grenzschicht an rotierenden Drehkorpern bei axialer Anstromung,” Ing. Arch., 32, pp. 393–413.
Shimizu,  Y., Nagafusa,  M., and Kuzuhara,  S., 1982, “Effects of Approaching Flow Types on the Performances of Straight Conical Diffusers,” Bull. JSME, 25, No. 208, pp. 1506–1512.
Hoffman,  J. A., 1981, “Effects of Free-Stream Turbulence on Diffuser Performance,” ASME J. Fluids Eng., 103, No. 3, pp. 385–390.

Figures

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Axial velocity distribution in the swirling flow
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Circumferential velocity distribution in the swirling flow
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Pressure isolines in the swirling flow
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Dependence of separation point position on the rotation parameter of the spinner
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Influence of the hub rotation upon the circumferential velocity distribution
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Range of modes of non-separating flow
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Axial velocity distribution in the non-swirling flow
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Influence of hub rotation parameter upon the integral parameters of flow
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Influence of angle at the hub vertex upon the integral parameters of flow
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Influence of swirl intensity upon the integral parameters of flow

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