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Laser Doppler velocimeter measurements in a turbine stator cascade facilityA laser Doppler velocimeter (LDV) developed for mapping the flow velocity downstream from a 32-inch diameter annular cascade of turbine stator vanes is described. The LDV measurements were taken in a plane located approximately 0.5 inch downstream of the trailing edges of the vanes. Two components of the mean velocity (axial and circumferential) were measured. The flow velocities were in the high subsonic range. The LDV optics are of the dual scatter type with off-axis collection of the scattered light. The electronics system is based on the measurement of the time interval corresponding to eight periods of the Doppler signal and has a range of 10 to 80 MHz. The LDV measurements are compared with previous measurements made with a pressure probe.
Document ID
19740045024
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Seasholtz, R. G.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
March 1, 1974
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Laser Velocimetry Workshop
Location: West Lafayette, IN
Start Date: March 27, 1974
End Date: March 29, 1974
Accession Number
74A27774
Distribution Limits
Public
Copyright
Other

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