Active modeling of large-scale turbulence

The scale of turbulence generated using conventional techniques is usually limited by the size of the wind tunnel. In many cases the prototype turbulence length scale can not be correctly modeled. A new technique, active turbulence modeling, which overcomes this limitation is introduced and illustra...

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Published inJournal of wind engineering and industrial aerodynamics Vol. 13; no. 1; pp. 465 - 475
Main Authors Bienkiewicz, B., Cermak, J.E., Peterka, J.A., Scanlan, R.H.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.1983
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Abstract The scale of turbulence generated using conventional techniques is usually limited by the size of the wind tunnel. In many cases the prototype turbulence length scale can not be correctly modeled. A new technique, active turbulence modeling, which overcomes this limitation is introduced and illustrated. It is shown how turbulence can be controlled by active supplying of additional energy to the flow. The turbulence intensity and scale, spectra, and space cross-correlations are presented and discussed. The scale of turbulence, generated in an active manner, is one order of magnitude larger than the maximum scale obtainable in the same wind tunnel using a passive technique of turbulence modeling. The presented technique could be used in studies of the turbulence scale effects on the aerodynamics of buildings and structures.
AbstractList The scale of turbulence generated using conventional techniques is usually limited by the size of the wind tunnel. In many cases the prototype turbulence length scale can not be correctly modeled. A new technique, active turbulence modeling, which overcomes this limitation is introduced and illustrated. It is shown how turbulence can be controlled by active supplying of additional energy to the flow. The turbulence intensity and scale, spectra, and space cross-correlations are presented and discussed. The scale of turbulence, generated in an active manner, is one order of magnitude larger than the maximum scale obtainable in the same wind tunnel using a passive technique of turbulence modeling. The presented technique could be used in studies of the turbulence scale effects on the aerodynamics of buildings and structures.
Author Scanlan, R.H.
Bienkiewicz, B.
Peterka, J.A.
Cermak, J.E.
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Cermak, Bienkiewicz, Peterka, Scanlan (BIB1) September 17–19, 1979
Corrsin (BIB6) 1963; Vol. VIII/2
Bienkiewicz (BIB2) 1981
Batchelor (BIB5) 1956
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Surry (10.1016/0167-6105(83)90165-4_BIB8) 1968; Vol. 1
Batchelor (10.1016/0167-6105(83)90165-4_BIB5) 1956
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Cermak (10.1016/0167-6105(83)90165-4_BIB1) 1979
Corrsin (10.1016/0167-6105(83)90165-4_BIB6) 1963; Vol. VIII/2
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– volume: Vol. 1
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  ident: 10.1016/0167-6105(83)90165-4_BIB8
  article-title: Turbulence in a Wind Tunnel and its Use in Studying the Turbulence Effects on Aerodynamics of a Rigid Circular Cylinder
  contributor:
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  article-title: Active Modeling of Turbulence for Wind-Tunnel Studies of Bridge Models
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  ident: 10.1016/0167-6105(83)90165-4_BIB1
  article-title: Active Turbulence Generator for Study of Bridge Aerodynamics
  contributor:
    fullname: Cermak
– year: 1956
  ident: 10.1016/0167-6105(83)90165-4_BIB5
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    fullname: Batchelor
– start-page: 113
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  ident: 10.1016/0167-6105(83)90165-4_BIB3
  article-title: A New Technique of Modeling Atmospheric Turbulence for Wind-Tunnel Tests of Bridge Models
  contributor:
    fullname: Bienkiewicz
– volume: Vol. VIII/2
  year: 1963
  ident: 10.1016/0167-6105(83)90165-4_BIB6
  contributor:
    fullname: Corrsin
– year: 1965
  ident: 10.1016/0167-6105(83)90165-4_BIB7
  article-title: On the Flow Behind a Coarse Grid and its Use as Model of Atmospheric Turbulence in Studies Related to Wind Loads on Buildings
  publication-title: NPL Aero Report No. 1143
  contributor:
    fullname: Vickery
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