Acta Mechanica Sinica

, Volume 35, Issue 1, pp 24–31 | Cite as

Spectral measurements of hypervelocity flow in an expansion tunnel

  • C. K. YuanEmail author
  • K. Zhou
  • Y. F. Liu
  • Z. M. Hu
  • Z. L. Jiang
Research Paper


Atmospheric reentry vehicles and planetary probes fly through the atmosphere at hypervelocity speed. At such speed, there is a significant proportion of heat load to the vehicle surface due to radiative heating. Accurate prediction needs a good knowledge of the radiation spectrum properties. In this paper, a high-speed camera and spectrograph coupled to an intensified charge-coupled device have been implemented to investigate the radiation flow over a semi-cylinder model. The experiments were carried out in the JF16 expansion tunnel with secondary shock velocity of 7.9 km·s−1. Results show that the emission spectrum comprises several atomic lines and molecular band systems. We give detailed data of the radiation spectrum, shock shape, shock detached distance and radiation intensity varying with space and wavelength. This valuable experimental dataset will be helpful to validate computational fluid dynamics codes and radiation models, which equates to increased prediction accuracy of radiation heating. Also, some suggestions for spectral measurement in hypervelocity flow field were list in the end.


Spectral measurement Hypervelocity flow Radiation Expansion tunnel 



This work was supported by the National Natural Science Foundation of China (Grants 11602275, 11672308, 11672312, and 11532014.). The author thanks the people helping with this work and acknowledges the valuable suggestions from the peer reviewers.


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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • C. K. Yuan
    • 1
    • 2
    Email author
  • K. Zhou
    • 3
  • Y. F. Liu
    • 1
    • 2
  • Z. M. Hu
    • 1
    • 2
  • Z. L. Jiang
    • 1
    • 2
  1. 1.State Key Laboratory of High-Temperature Gas Dynamic, Institute of MechanicsChinese Academy of SciencesBeijingChina
  2. 2.School of Engineering SciencesUniversity of Chinese Academy of SciencesBeijingChina
  3. 3.China Academy of Aerospace AerodynamicsBeijingChina

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