THERMAL SCIENCE

International Scientific Journal

INVESTIGATION OF THE TURBULENT SWIRL FLOWS IN A CONICAL DIFFUSER

ABSTRACT
Results of the theoretical and experimental investigations of the turbulent mean swirl flows characteristics change along straight conical diffuser of incompressible fluid (air) are presented in this paper. The main swirl flow characteristics review is given. In addition: the specific swirl flow energy, the energy loss, the mean circulation, the swirl flow parameter, the ratio between the swirl and axial flow loss coefficients change along the diffuser are presented. Among other values: the Boussinesq number, outlet Coriolis coefficient and swirl flow loss coefficient dependences on inlet swirl flow parameter are also given. The swirl flow specific energy and outlet Coriolis coefficient calculation procedure are presented in this paper, as well as experimental test bed and measuring procedures. The swirl flow fields were induced by the axial fan impeller. Various swirl parameters were achieved by the impeller openings and rotational speeds.
KEYWORDS
PAPER SUBMITTED: 2010-06-30
PAPER REVISED: 2010-07-06
PAPER ACCEPTED: 2010-07-07
DOI REFERENCE: https://doi.org/10.2298/TSCI100630026B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2010, VOLUME 14, ISSUE Supplement 1, PAGES [S141 - S154]
REFERENCES
  1. Beiler, M. G., Carolus, T.H., Computation and Measurement of the Flow in Axial Flow Fans with Skewed Blades, ASME J. of Turbomachinery, Vol. 121 (1999), pp. 59-66
  2. Azad, R.S., Hummel, R.H., Measurement of the Intermittency Factor in Diffuser-Flow, Canadian J. of Physics, Vol. 49 (1971), No. 23, pp. 2917-2930
  3. Čantrak, S., Experimental Investigation of the Statistical Properties of Swirl Flows in Pipes and Diffusers (in German), Ph.D. thesis, Karlsruhe, Germany, 1981
  4. Čantrak, S., Benišek, M., Nedeljković, M., Lečić, M., Anisotropic Turbulence and Non-Local Diffusion in Swirl Shear Flow (in German), PAMM 2, 2003, pp. 346-347
  5. Čantrak, S., Felsch, K. O., Jungbluth, H., Turbulence Structure and Mechanism of the Transport Process in Diffusor Swirl Flow (in German), ZAMM 65 (4), 1985, pp. T 189-T 191
  6. Neve, R.S., Wirasinghe, N.E.A., Changes in Conical Diffuser Performance by Swirl Addition, Aeronautical Quarterly, Vol. 29 (1978), pp. 131-143
  7. Okwuobi, P.A.C., Azad, R.S., Turbulence in a Conical Diffuser with Fully Developed Flow at Entry, J. Fluid. Mech., Vol. 57 (1973), part 3, pp. 603-622
  8. Senoo, Y., Kawaguchi, N., Nagata, T., Swirl Flow in Conical Diffusers, Bulletin JSME, Vol. 21 (1978), No. 151, pp. 112-119
  9. So, K.L., Vortex Phenomena in a Conical Diffuser, AIAA Journal, Vol. 5 (1967), No. 6, pp. 1072-1078
  10. Weske, J.R., Sturov, G.E., Experimental Investigation of Turbulent Swirl Flow in a Cylindrical Tube, Proc. Siberation Siv. Acad. Sci., USSR, 1972, Vol. 13, No. 3, p. 3-7
  11. Wiggins, E.G., Measurement and Correlation of Reynolds Stresses in a Conical Diffuser, Ph.D. thesis, Purdue Univ., Lafayette, Ind., 1976
  12. Benišek, M., Investigation of the Swirl Flow in Long Lined Circular Pipes (in Serbian), Ph.D. thesis, Faculty of Mech. Eng., Belgrade, 1979
  13. Benišek, M., Čantrak, S., Nedeljković, M., Lečić, M., Universal Calibration Characteristics Conrad Probe for Measures 3D Velocity, Pressure and Total Pressure of Stationary Inviscid Fluid Flow, Proc. of Metrological, Yug. Cong., Novi Sad, 2000
  14. Benišek, M.H., Lečić, M.R., Ilić, D.B., Čantrak, Đ.S., Aplication of New Classical Probes in Swirl Fluid Flow Measurements, Experimental Techniques, Vol. 34 (2010), Issue 3, pp. 74-81
  15. Čantrak, S., Hydrodynamics - Selected Chapters (in Serbian), Faculty of Mechanical Engineering, Belgrade, 1998
  16. Strscheletzky, M., Equilibrium Forms of the Axisymmetric Flows with Constant Swirl in Straight, Cylindrical Rotation Geometries (in German), Voith Forschung und Konstruktion, Heft 5 (1959), Aufsatz 1
  17. Kitoh, O., Experimental Study of Turbulent Swirl Flow in a Straight Pipe, J. Fluid Mech., Vol. 225 (1991), pp. 445-479
  18. Mahmud, T., Truelove, J.S., Wall, T.F., Flow Characterizations of Swirl Coaxial Jets from Diverging Nozzels, J. Fluid Eng.,Vol. 109 (1987), pp. 275-281
  19. Baker, W., Sayre, C.L., Decay of Swirl Flow of Incompressible Fluids in Long Pipes, Flow: Its Meas. And Control in Sci. And Ind., Proc. Symp., Vl. (1971) Pt. 1, Pittsburgh, pp. 301-312
  20. Povh, I.L., Aerodynamic Experiments in Mechanical Engineering (in Russian), Moscow, Leningrad, 1974

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