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Shock Waves pp 921-926 | Cite as

Observation of mixing and combustion processes of H2 jet injected into supersonic streamwise vortices

  • T. Sunami
  • F. Scheel
Conference paper

Abstract

We will present the main results of our experimental investigation of the supersonic mixing and combustion processes of gaseous hydrogen injected into the streamwise vortices in the Mach 2 and 2.5 vitiation airflow. Instantaneous Mie scattering and OH-PLIF images clearly show 1) the evolution of various scale turbulent eddies and coherent eddy structures within the large-scale streamwise vortices, 2) breakdown of streamwise vortices due to combustion, which lead to more uniform fuel distribution, and 3) the turbulent flame structures, in which the distributions of OH-emission and of its intensity show remarkably unsteady and random patterns in various spatial scales. These features demonstrate the ability of streamwise vortices to promote strong turbulent mixing and combustion in supersonic flows.

Keywords

Streamwise Vortex Strut Thickness Side View Image Flight Mach Number Expansion Ramp 
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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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • T. Sunami
    • 1
  • F. Scheel
    • 2
  1. 1.German Aerospace CenterDLR LampoldshausenHardthausenGermany
  2. 2.Japan Aerospace Exploration AgencyKakuda, MiyagiJapan

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