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Vaporisation dEcomposition thermique de dimethylhydrazine, d'hydrate d'hydrazine de leur melange UH25

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Abstract

Engine Viking of Ariane 4 is supplied with asymmetrical dimethylhydrazine (UDMH) (CH3)2NNH2. An addition of a small amount of hydrazine hydrate N2H4×H2O was proposed to increase the thermal stability of UDMH. The mixture where the mass ratio (CH3)2NNH2/N2H4×H2O is equals to 75/25, is called UH25. These propelling agents are unstable when they are heated and the optimisation of burning conditions requires a good knowledge of their vaporisation and of their thermal decomposition kinetics.

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Authors and Affiliations

  1. Laboratoire de Chimie Minérale Appliquée Génie des Procédés, Université Ibn-Zohr, 28/S 80 000, Agadir, Maroc

    R. Bellajrou & M. El-Hadek

  2. Laboratoire de Physico-Chimie des Matériaux Luminescents, 69622, Villeurbanne Cedex, France

    M. Th. Cohen-Adad & R. Cohen-Adad

  3. Office National d'Etudes de Recherches Aérospatiales, 92320, Chatillon, France

    M. Habiballah

Authors
  1. R. Bellajrou
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  2. M. Th. Cohen-Adad
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  3. R. Cohen-Adad
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  4. M. Habiballah
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  5. M. El-Hadek
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Bellajrou, R., Cohen-Adad, M.T., Cohen-Adad, R. et al. Vaporisation dEcomposition thermique de dimethylhydrazine, d'hydrate d'hydrazine de leur melange UH25. Journal of Thermal Analysis and Calorimetry 63, 559–564 (2000). https://doi.org/10.1023/A:1010154223757

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  • DOI: https://doi.org/10.1023/A:1010154223757

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