FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W193854549> ?p ?o ?g. }

• W193854549 abstract "Two Doppler global velocimetry systems were applied in parallel to assess their performance in wind tunnel environments. Both DGV systems were mounted on a common traverse surrounding the glass-walled 1.4 x 1.8 m 2 test section of the ONERA F2 wind tunnel. The traverse normally supports a three-component forward-scatter laser Doppler velocimetry system. The reproducible vortical flow field generated by the blunt tip of an airfoil (300 mm chord) was chosen for this investigation and was precisely surveyed by LDA just prior to this investigation.Both DGV systems shared the same continuous wave laser light source (argon ion, 514 nm), laser frequency stabilization and fiber optic light sheet delivery system. The principle differences between the DGV implementations are with regard to the imaging configuration. The ONERA Configuration relied on a single camera view that observed three successively operated light sheets. The DLR configuration used three camera views simultaneously to observe a single light sheet using a four-branch fiber imaging bundle.In both configurations off-normal viewing arrangements were present, the DGV system of ONERA observed two light sheets in forward scattering and one in back-scattering mode which had a roughly ten times lower signal level. The DLR system had all viewing directions at a similar forward scattering angle, such that all views had approximately the same signal levels at the exit of the fiber imaging bundle. The closed-circuit wind tunnel was seeded globally with sub-micron oil droplets using an oil-based smoke generator. Stream-tube seeding was used in addition to improve the back-scatter signal levels. CCD camera exposures varied from 0.25−2.0 seconds in forward scattering views to 2−5 seconds in back scattering views. The subsequent processing of the multi-view DGV data resulted in improvements of DLR’s DGV software package to deal, for instance, with artifacts introduced by the image fiber bundles. The availability of reproducible reference data from LDA allows a further quantification of error sources in the DGV measurements. Overall the agreement between the DGV and the LDA measurements is on the order of 1 m/s for the DLR system. Residual bias is believed to be caused by scene illumination stemming from the luminous light sheet within the seeded flow which cannot be easily quantified in absence of seeding (i.e. by background image acquisition). Also the spatial averaging imposed by the optical system dampens out velocity gradients such that vortex peaks are underestimated in comparison to the ONERA DGV system which has a higher optical fidelity (see Part II). Nonetheless the DLR system was shown to acquire reliable 3-C velocimetry data using single recordings of the composite views. In principle the presented configuration would be well suited for pulsed DGV measurements using a single light sheet." @default.
• W193854549 created "2016-06-24" @default.
• W193854549 creator A5031376036 @default.
• W193854549 creator A5039916029 @default.
• W193854549 creator A5055786647 @default.
• W193854549 creator A5057572253 @default.
• W193854549 creator A5060244388 @default.
• W193854549 creator A5061923921 @default.
• W193854549 creator A5070638389 @default.
• W193854549 date "2006-04-01" @default.
• W193854549 modified "2023-09-24" @default.
• W193854549 title "Results of the joint DLR-ONERA DGV measurement campaign in the F2 wind tunnel – Part I" @default.
• W193854549 hasPublicationYear "2006" @default.
• W193854549 type Work @default.
• W193854549 sameAs 193854549 @default.
• W193854549 citedByCount "0" @default.
• W193854549 crossrefType "journal-article" @default.
• W193854549 hasAuthorship W193854549A5031376036 @default.
• W193854549 hasAuthorship W193854549A5039916029 @default.
• W193854549 hasAuthorship W193854549A5055786647 @default.
• W193854549 hasAuthorship W193854549A5057572253 @default.
• W193854549 hasAuthorship W193854549A5060244388 @default.
• W193854549 hasAuthorship W193854549A5061923921 @default.
• W193854549 hasAuthorship W193854549A5070638389 @default.
• W193854549 hasConcept C100086909 @default.
• W193854549 hasConcept C120456961 @default.
• W193854549 hasConcept C120665830 @default.
• W193854549 hasConcept C121332964 @default.
• W193854549 hasConcept C127413603 @default.
• W193854549 hasConcept C144836735 @default.
• W193854549 hasConcept C146978453 @default.
• W193854549 hasConcept C182748727 @default.
• W193854549 hasConcept C189360488 @default.
• W193854549 hasConcept C191486275 @default.
• W193854549 hasConcept C196558001 @default.
• W193854549 hasConcept C24890656 @default.
• W193854549 hasConcept C57879066 @default.
• W193854549 hasConceptScore W193854549C100086909 @default.
• W193854549 hasConceptScore W193854549C120456961 @default.
• W193854549 hasConceptScore W193854549C120665830 @default.
• W193854549 hasConceptScore W193854549C121332964 @default.
• W193854549 hasConceptScore W193854549C127413603 @default.
• W193854549 hasConceptScore W193854549C144836735 @default.
• W193854549 hasConceptScore W193854549C146978453 @default.
• W193854549 hasConceptScore W193854549C182748727 @default.
• W193854549 hasConceptScore W193854549C189360488 @default.
• W193854549 hasConceptScore W193854549C191486275 @default.
• W193854549 hasConceptScore W193854549C196558001 @default.
• W193854549 hasConceptScore W193854549C24890656 @default.
• W193854549 hasConceptScore W193854549C57879066 @default.
• W193854549 hasLocation W1938545491 @default.
• W193854549 hasOpenAccess W193854549 @default.
• W193854549 hasPrimaryLocation W1938545491 @default.
• W193854549 hasRelatedWork W1496426966 @default.
• W193854549 hasRelatedWork W1497398381 @default.
• W193854549 hasRelatedWork W149756024 @default.
• W193854549 hasRelatedWork W1567301177 @default.
• W193854549 hasRelatedWork W159865832 @default.
• W193854549 hasRelatedWork W2029317319 @default.
• W193854549 hasRelatedWork W2044004115 @default.
• W193854549 hasRelatedWork W2106942986 @default.
• W193854549 hasRelatedWork W2155722674 @default.
• W193854549 hasRelatedWork W2158051849 @default.
• W193854549 hasRelatedWork W2159923459 @default.
• W193854549 hasRelatedWork W2264922838 @default.
• W193854549 hasRelatedWork W2273197244 @default.
• W193854549 hasRelatedWork W2321081683 @default.
• W193854549 hasRelatedWork W2332062816 @default.
• W193854549 hasRelatedWork W2793691528 @default.
• W193854549 hasRelatedWork W2909986086 @default.
• W193854549 hasRelatedWork W41778455 @default.
• W193854549 hasRelatedWork W52325668 @default.
• W193854549 hasRelatedWork W793153401 @default.
• W193854549 isParatext "false" @default.
• W193854549 isRetracted "false" @default.
• W193854549 magId "193854549" @default.
• W193854549 workType "article" @default.