Background Oriented Schlieren Demonstrations

reportActive / Technical Report | Accession Number: ADA389440 | Open PDF

Abstract:

In this project report we present the application of a novel schlieren technique for two different tests. The optical method is referred to as Background Oriented Schlieren BOS in the following. Additionally the differences between BOS and an extension of it, the reference-free stereoscopic arrangement BOSS in the following, will be discussed. Experimental studies have been carried out to investigate a supersonic jet in an anechoic chamber of NASA Langley and details of the vortex generation next to the blade tips of an Sikorsky UH60 of AFDD at Ames. The background oriented techniques seem to well complete other optical techniques like shadowgraphy or focussing schlieren methods and yield additional quantitative information. Furthermore, they allow - in contrast to laser based techniques - to study the Reynolds-number depending vortex development in fill-scale flight tests more easily.

Author(s):
Richard, H. ; Raffel, M.
Author Organization(s):
DEUTSCHES ZENTRUM FUR LUFT-UND RAUMFAHRT EV GOETTINGEN (GERMANY)
Descriptive Note:
Final rept.
Supplementary Note:
--Original contains color plates: All DTIC reproductions will be in black and white.
Pagination:
0037

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARDSG-R/D 8963-AN-0IS
Contract/Grant Number(s):
N68171-00-M-5854
Monitor Series:
R/D 8963-AN-0IS, ARDSG
 Subject Terms
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Air Platforms
Descriptor(s):
*OPTICS, *SCHLIEREN PHOTOGRAPHY, FLIGHT TESTING, OPTICAL PROPERTIES, EXPERIMENTAL DATA, VORTICES, LASER APPLICATIONS, GERMANY, ANECHOIC CHAMBERS, AERODYNAMICS, VORTEX GENERATORS, SUPERSONIC AIRCRAFT, BLADE TIPS
Field(s)/Group(s):
Photography, Optics
Keyword(s):
FOREIGN REPORTS, *BOS(BACKGROUND ORIENTED SCHLIEREN), UH 60 AIRCRAFT
Report Date:
1999 Jan 01
Creation Date:
2001 May 16