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Developing the Modular Background-Oriented Full-Scale Schlieren Technique

[+] Author Affiliations
Yu-Cheng Hung, Chien-Chih Chen, Chen-Ching Ting

National Taipei University of Technology, Taiwan

Shun-Chih Wang

Institute of Occupational Safety and Health, Taiwan

Paper No. IMECE2011-63326, pp. 1735-1741; 7 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5490-7
  • Copyright © 2011 by ASME


This article mainly presents the full-scale schlieren technique using modular background-oriented light source instead of the retroreflective method. Moveover, this article is also focused on investigating sensitivity influence of the cutoff light percentage by the cutoff grid. An unit background-oriented light source is composed of the fluorescent lamps of Philips-865, the atomizing film, and the linear grating mask in this work. The applied cutoff grids are with 50, 60, 70, 80, and 90% of the cutoff light percentage respectively. The results show that a cutoff grid with 90% cutoff light for the conventional Z-arrangement schlieren technique and a cutoff grid with 60% cutoff light for the full-scale schlieren technique receives the best visualization.

Copyright © 2011 by ASME



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