Velocity and Turbulence Measurements in the Flow Downstream of Flow Conditioners

  • Wolfgang Merzkirch
  • Kathrin Kalkühler


Hot-wire anemometry is used for measuring the flow field downstream of 3 different types of flow conditioners that are exposed to pipe flow disturbed by a 90° out-of-plane double bend. This disturbance causes asymmetry of the velocity profile and swirl.

While the swirl is found to be removed completely, the measured profiles of axial mean velocity and its turbulent fluctuactions re-develop in axial direction according to different laws. The conditioners show different efficiencies in re-developing the flow. It is apparent that the most important processes determining the efficiency of the conditioner take place in its near field which ends at a distance of about 3 or 4 pipe diameters downstream.


Particle Image Velocimetry Pipe Flow Perforated Plate Tube Bundle Straight Pipe 
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  1. Akashi, K.; Watanabe, H.; Koga, K. 1978: Flow rate measurement in pipe line with many bends. Mitsubishi Heavy Ind. 15 (2), 87–96.Google Scholar
  2. Böttcher, J.; Wedemeyer, E. 1989: The flow downstream of screens and its influence on the flow in the stagnation region of cylindrical bodies. J. Fluid Mech. 204, 501–522.CrossRefGoogle Scholar
  3. Bradshaw, P. 1965: The effect of wind-tunnel screens on nominally two-dimensional boundary layers. J. Fluid Mech. 22, 679–687.CrossRefGoogle Scholar
  4. Fiedler, H.E. 1997: A note on secondary flow in bends and bend combinations. Exp. Fluids 23, 262–264.CrossRefGoogle Scholar
  5. Gersten, K.; Herwig, H. 1992: Strömungsmechanik. Vieweg-Verlag, Wiesbaden.Google Scholar
  6. Kalkiihler, K.: Dissertation, Universität Essen.Google Scholar
  7. Laufer, J. 1954: The structure of turbulence in fully developed pipe flow. NACA Rep. 1174.Google Scholar
  8. Lawn, C. 1971: The determination of the rate of dissipation in turbulent pipe flow. J. Fluid Mech, 48, 477–505.CrossRefGoogle Scholar
  9. Laws, E.M. 1990: Flow conditioning - a new development. Flow Meas. Instrum. 1, 165–170.CrossRefGoogle Scholar
  10. Rettich, T.; Poppen, G. 1997: Ultrasonic flow measurement in turbulent pipe flow using a correlation technique. Proceed. FLUCOME ‘87, 167–170.Google Scholar
  11. Schlitter, T.; Merzkirch, W. 1996: PIV measurements of the time-averaged flow velocity downstream of flow conditioners in a pipeline. Flow Meas. Instrum. 7, 173–179.CrossRefGoogle Scholar
  12. Van Atta, C.W.; Yeh, T.T. 1972: Spectral transfer of scalar and velocity fields in heated grid turbulence. J. Fluid Mech. 58, 233–261.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Wolfgang Merzkirch
    • 1
  • Kathrin Kalkühler
    • 1
  1. 1.Lehrstuhl für StrömungslehreUniversität EssenEssenGermany

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