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Communication Dans Un Congrès Année : 2019

Experimental determination of thermodynamic properties of Hydrazine, MMH and NTO along the saturation line up to the critical point

Résumé

Thermodynamic properties as density and the speed of sound as a function of pressure and temperature are not very well-known for higher temperatures for typical storable propellants as Hydrazine, MMH or NTO. Most data is based on low temperature experiments that have been extrapolated or calculated from theoretical correlations. To our knowledge no experimental data exists up to the critical temperature except for a single experiment with Hydrazine that was carried out by Lobry de Bruyn [4] in 1896 and suffered from a catastrophic decomposition while trying to reproduce the results. This paper deals with the design, development and use of an experimental installation capable of measuring the density and the speed of sound of the liquid phase as well as the density of the gaseous phase for these storable propellants from (close to) the triple point up to the critical point. Utmost care has been given to the safety aspects of the remotely operated installation. Low cost solutions have been devised to respect a rather tight budget. The installation is currently in its trial and calibration phase using pure water, this paper contains some results of these tests. The real propellant tests are bound to start in the coming months.
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Dates et versions

hal-02491910 , version 1 (26-02-2020)

Identifiants

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Jouke Hijlkema, Marco de Rosa. Experimental determination of thermodynamic properties of Hydrazine, MMH and NTO along the saturation line up to the critical point. EUCASS 2019, Jul 2019, MADRID, Spain. ⟨10.13009/EUCASS2019-297⟩. ⟨hal-02491910⟩

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