Advertisement

Density Measurement of Large Scale Transonic Flow Fields

  • G. E. A. Meier
  • B. Stasicki
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 73)

Abstract

Density gradients are recorded by interferometric or by schlieren techniques. Both methods require complicated optical set-ups and provide limited field sizes. A new type of computerised schlieren system has very few optical elements and no field limitation. Background Oriented Schlieren (BOS) uses distorted images of reference objects, caused by density gradients (schlieren) in light scattering flows or waves, to get information about these waves. Comparison of a distorted with an undistorted image of a deliberately structured background provides the density gradients.

Key words

transonic flow density gradients computerised schlieren system vector fields 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Bibliography

  1. 1.
    Meier, G.E.A.: „Hintergrund-Schlierenmeßverfahren,” Deutsche Patentanmeldung 19942856.5 (1999)Google Scholar
  2. 2.
    Meier, G.E.A.: „Computerized background-oriented schlieren,” Experiments in Fluids 33 (2002)181–187ADSGoogle Scholar
  3. 3.
    Raffel, M.; Richard, H.; Meier, G.E.A.: „On the applicability of background oriented optical tomography for large scale aerodynamic investigations,” Experiments in Fluids 28, pp. 477–481,(2000)ADSCrossRefGoogle Scholar
  4. 4.
    Richard, H. and Raffel, M.: „Principle and application of the background oriented schlieren (BOS) Method,” Measurement, Science, and Technology Vol. 12, pp. 1576–1585, (2001)ADSCrossRefGoogle Scholar
  5. 5.
    Willert, Ch.: „PivView,” (Software) www.pivtech.comGoogle Scholar
  6. 6.
    Klein, Chr.; Trinks, O.; Henne, U.; Sachs, W.E.; Engler, R.H.: „PSP-Messung am NLR7301-DLR-AE3-Modell im Transsonischen Windkanal Göttingen (DNW-TWG) in der dritten Messkampagne des DLR-Projekts Aewstabi” Bericht DLR-IB 223-2001 Cl 1, (2001).Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • G. E. A. Meier
    • 1
  • B. Stasicki
    • 2
  1. 1.University of HannoverHannoverGermany
  2. 2.DLR-Institute of Aerodynamics and Flow TechnologyGöttingenGermany

Personalised recommendations