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Shock Waves pp 209-214 | Cite as

Time resolved holographic interferometry for short duration hypersonic high enthalpy test facilities

  • J. Martinez Schramm
  • A. Boutry
  • M. Vital Durand
  • K. Hannemann
Conference paper

Abstract

The High Enthalpy Shock Tunnel Göttingen (HEG) of the German Aerospace Cen- ter (DLR) is one of the major European hypersonic test facilities. The HEG can operate over a wide range of test conditions, from low altitude high density Mach 6 flows through the simulation of Mach 8 flow at approximately 30 km altitude up to high enthalpy re-entry conditions. Full utilization of such ground based high enthalpy impulse facilities, with typical test times in the order of one to several milliseconds, requires detailed knowledge of the flow in the test section, and its starting processes. Further, the temporal development of the model flow must be known in order to assure that a steady flow has developed during the test time. For that reason a high speed flow visualization (HSFV) system has been implemented at HEG using the schlieren and shadowgraph technique. This paper describes a feasibility study undertaken to extend the optical measurement capabilities of the HEG by combining the HSFV system with the phase step holographic interferometry (HI) system used so far in single shot mode.

Keywords

Test Section Light Path Reference Beam Holographic Interferometry Object Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • J. Martinez Schramm
    • 1
  • A. Boutry
    • 2
  • M. Vital Durand
    • 2
  • K. Hannemann
    • 1
  1. 1.German Aerospace Center DLR, Institute of Aerodynamics and Flow TechnologyGöttingenGermany
  2. 2.École Polytechnique Fédérale de LausanneLausanneSwitzerland

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