Application of Doppler Global Velocimetry to supersonic flows | Zendy

James F. Meyers | Zendy

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Application of Doppler Global Velocimetry to supersonic flows

Author(s) -

James F. Meyers

Publication year - 1996

Publication title -

nasa technical reports server (nasa)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.1996-2188

Subject(s) - laser doppler velocimetry , supersonic speed , doppler effect , velocimetry , acoustic doppler velocimetry , aerospace engineering , environmental science , geology , acoustics , mechanics , physics , engineering , astronomy , medicine , blood flow

The design and implementation of Doppler Global Velocimetry (DGV) for testing in the Langley Unitary Plan Wind Tunnel is presented. The discussion begins by outlining the characteristics of the tunnel and the test environment, with potential problem areas highlighted. Modifications to the optical system design to implement solutions for these problems are described. Since this tunnel entry was the first-ever use of DGV in a supersonic wind tunnel, the test series was divided into three phases, each with its own goal. Phase I determined if condensation provided sufficient scattered light for DGV applications. Phase II studied particle lag by measuring the flow about an oblique shock above an inclined flat plate. Phase III investigated the supersonic vortical flow field above a 75-deg delta wing at 24-deg angle of attack. Example results from these tests are presented. (Author)

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