Vaporisation dEcomposition thermique de dimethylhydrazine,d'hydrate d'hydrazine de leur melange UH25 |
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| Authors: | Bellajrou R Cohen-Adad M Th Cohen-Adad R Habiballah M El-Hadek M |
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| Institution: | (1) Laboratoire de Chimie Minérale Appliquée Génie des Procédés, Université Ibn-Zohr, 28/S 80 000 Agadir, Maroc;(2) Laboratoire de Physico-Chimie des Matériaux Luminescents, 69622 Villeurbanne Cedex, France;(3) Office National d'Etudes de Recherches Aérospatiales, 92320 Chatillon, France |
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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.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | asymmetric dimethylhydrazine hydrazine monohydrate propellant thermal decomposition vapour pressure |
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