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Investigation of Axisymmetric Free Air Jet at Moderate Reynolds Number Using DPIV

Ma, G. Y. (1998) Investigation of Axisymmetric Free Air Jet at Moderate Reynolds Number Using DPIV. DLR-Interner Bericht. 223-98 A 20.

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Using DPIV measurement method, 2-D instantaneous velocity distributions in both near and far fields of a axisymmetric free air jet at moderate Reynolds numbers are measured in detail. The vorticity distributions and stream line maps also are calculated from these measured velocity distributions. By ensenblely averaging instantaneous velocity distributions, some statistical parameters of jet, i.e., mean velocity, mean turbulent intensity, are calculated. The statistical characteristics of jet are analyzed in detail. These measurement results of statistical characteristics confirm with that obtained by previous researchers by pointless methods. According to the measurement results of instantaneous velocity and vorticity distributions as well as that of flow visualization, the evolution process of vortex in shear layer are also analyzed, such as, originating, growing, pairing, deforming, and breaking down

Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Investigation of Axisymmetric Free Air Jet at Moderate Reynolds Number Using DPIV
AuthorsInstitution or Email of Authors
Keywords:measurement method, Reynolds number, axisymmetric free air jet
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:23

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