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There are a total of 12 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Digital Image Velocimetry
Author(s): Cho, Y.-C.
Abstract: Digital image velocimetry is technique for extracting two-dimensional (in image planes) velocities of objects from multiple photographs or video images of objects. Devised to overcome disadvantages of particle-image ...
NASA Center: Ames Research Center
Publication Year: 1991
Added to NTRS: 2005-09-30
Accession Number: 91B10528; Document ID: 19910000528; Report Number: ARC-12774
Sensor development programs at NASA Ames Research Center
Author(s): Cho, Y.-C.
Abstract: Two sensor development programs being conducted at the Fluid Mechanics Laboratory, NASA Ames Research Center are described, one in progress and the other being initiated. The ongoing program involves digital image ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 89N26808; Document ID: 19890017437; Report Number: A-89167, NAS 1.15:102217, NASA-TM-102217
Personal Computer (PC) based image processing applied to fluid mechanics
Author(s): Cho, Y.-C.; Mclachlan, B. G.
Abstract: A PC based image processing system was employed to determine the instantaneous velocity field of a two-dimensional unsteady flow. The flow was visualized using a suspension of seeding particles in water, and a laser sheet ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2005-08-25
Accession Number: 88N11087; Document ID: 19880001705; Report Number: A-87329, NAS 1.15:100024, NASA-TM-100024
Instantaneous velocity field measurement of objects in coaxial rotation using digital image velocimetry
Author(s): Cho, Y.-C.; Park, H.
Abstract: For its experimental validation, digital image velocimetry is applied to determine the instantaneous velocity field of objects rotating around an axis with a constant angular velocity. Digital image velocimetry (DIV) is a ...
NASA Center: Ames Research Center
Publication Year: 1990
Added to NTRS: 2005-08-25
Accession Number: 93N72467; Document ID: 19930075020; Report Number: A-90312, NAS 1.15:102875, NASA-TM-102875
Personal computer (PC) based image processing applied to fluid mechanics research
Author(s): Cho, Y.-C.; Mclachlan, B. G.
Abstract: A PC based image processing system was employed to determine the instantaneous velocity field of a two-dimensional unsteady flow. The flow was visualized using a suspension of seeding particles in water, and a laser sheet ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 88A52190; Document ID: 19880064963
Reciprocity principle in duct acoustics
Author(s): Cho, Y.-C.
Abstract: Various reciprocity relations in duct acoustics have been derived on the basis of the spatial reciprocity principle implied in Green's functions for linear waves. The derivation includes the reciprocity relations between ...
NASA Center: Glenn Research Center
Publication Year: 1979
Added to NTRS: 2004-11-03
Accession Number: 80A20956; Document ID: 19800036786
Digital image velocimetry
Author(s): Cho, Y.-C.
Abstract: Digital image velocimetry is proposed for the measurement of the instantaneous velocity fields of time dependent flows. This technique improves the flow measurement by eliminating some of the restrictions on existing optical ...
NASA Center: Ames Research Center
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 89A32822; Document ID: 19890045451
Instantaneous velocity field measurement of objects in coaxial rotation using digital image velocimetry
Author(s): Cho, Y.-C.; Park, H.
Abstract: The instantaneous velocity fields of time-dependent flows, or of a collection of objects moving with spatially varying velocities, can be measured by means of digital image velocimetry (DIV). DIV overcomes several ...
NASA Center: Ames Research Center
Publication Year: 1990
Added to NTRS: 2004-11-03
Accession Number: 93A41061; Document ID: 19930057064
Instantaneous Velocity Field Measurement of Objects in Coaxial Rotation Using Digital Image Velocimetry
Author(s): Cho, Y.-C.; Park, H.
Abstract: For its experimental validation, digital image velocimetry is applied to determine the instantaneous velocity field of objects rotating around an axis with a constant angular velocity.
NASA Center: Ames Research Center
Publication Year: 1990
Added to NTRS: 2004-11-03
Document ID: 20000023188
Experimental and computational studies of unsteady viscous flows
Author(s): Davis, S.; Cho, Y.-C.; Mclachlan, B. G.
Abstract: This paper describes progress in validating incompressible Navier-Stokes codes using image-processed flow-field data. Solutions of the Navier-Stokes equations using a predictor/corrector scheme are compared directly with ...
NASA Center: Ames Research Center
Publication Year: 1988
Added to NTRS: 2004-11-03
Accession Number: 88A48778; Document ID: 19880061551; Report Number: AIAA PAPER 88-3521
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