Experimental Investigation of Near and Far Acoustic Field of a Small Turbojet

  • J. Haertig
  • C. Johé
Conference paper
Part of the IUTAM Symposia book series (IUTAM)


Experimental results concerning the near and far acoustic field of a small turbojet are presented. At idle speed (subsonic jet) the acoustic field of the engine is similar to the one of a strongly excited free jet model (tone noise with high azimutal coherence). At maximum speed (supersonic sub-critical jet) tone noise is more or less covered by jet noise and the far field is similar to the one of quiet jet model.


Coherence Settling 


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  1. [1]
    J. HAERTIG. Etude du couplage entre champ moyen cohérent et turbulent dans un jet libre rond excité. ISL — R 115/83Google Scholar
  2. [2]
    L. BOBIN, G. KRONENBERGER, A. le Bas. Etude expériment ale des corrélations azimutales du champ acoustique d’un jet libre froid. ISL — CR 79/4Google Scholar
  3. [3]
    C. JOHÉ, J. HAERTIG. Etude expérimentale des champs acoustiques proche et lointain d’un turboréacteur MICROTURBO TRS 18. ISL — R 113/84Google Scholar

Copyright information

© Springer, Berlin Heidelberg 1996

Authors and Affiliations

  • J. Haertig
    • 1
  • C. Johé
    • 1
  1. 1.Institut Franco-Allemand de Recherches de Saint-Louis (ISL)Saint-LouisFrance

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