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Improvement in spatial resolution of background-oriented schlieren technique by introducing a telecentric optical system and its application to supersonic flow

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Abstract

A telecentric optical system is applied to the background-oriented schlieren (BOS) technique to improve accuracy, overcoming the drawbacks of conventional diverging light observation. This paper describes the optical arrangement and formula for telecentric BOS measurement and presents measurement results obtained by the colored-grid background-oriented schlieren technique to confirm the theoretical prediction. The application of the new approach for a large-scale supersonic wind tunnel test is reported.

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Acknowledgments

This work was supported by JSPS KAKENHI Grant Numbers 23760764 and 25420848. The authors thank Prof. T. Abe and the technical stuff at JAXA/ISAS for their support in the experiments.

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Authors and Affiliations

  1. Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan

    Masanori Ota & Ryusuke Noda

  2. The French-German Research Institute of Saint-Louis (ISL), 5 rue General Cassagnou, 68301, Saint Louis, France

    Friedrich Leopold

  3. Kisarazu National College of Technology, 2-11-1 Kiyomidai-Higashi, Kisarazu, Chiba, 292-0041, Japan

    Kazuo Maeno

Authors
  1. Masanori Ota
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  2. Friedrich Leopold
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  3. Ryusuke Noda
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  4. Kazuo Maeno
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Correspondence to Masanori Ota.

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Ota, M., Leopold, F., Noda, R. et al. Improvement in spatial resolution of background-oriented schlieren technique by introducing a telecentric optical system and its application to supersonic flow. Exp Fluids 56, 48 (2015). https://doi.org/10.1007/s00348-015-1919-5

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  • DOI: https://doi.org/10.1007/s00348-015-1919-5

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