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Recherche numérique du mécanisme entraînant la formation de geysers dans une conduite d’alimentation de propergol cryogénique.

Numerical research of driving mechanism for geyser developing in cryogenic propellant feedline.

Numéro : pap. n. 949

Auteurs : MAO H., LI Y., WANG L., et al.

Résumé

Geyser would occur in long vertical cryogenic propellant feedline under certain conditions in space launch and propulsion engineering. In order to get a comprehensive knowledge of geyser, a numerical model was established. Geyser phenomenon in a bottom closed liquid oxygen feeding line was studied. Pressure and temperature change were obtained during geyser developing process. The mechanism of geyser is revealed. The results show that the temperature distribution in the tube tends to be low at both end and high in the middle. The geyser process occurs in the LO2 feed tube could be divided into incubation, eruption and refilling stages. Dramatic pressure fall would occurs in the eruption stage and pressure spike occurs in the refilling stage. The violent depressurization boiling is the main cause of geyser eruption and the condensation induced water hammer caused by vapor condensation in the tube is the main mechanism of pressure spike in the refilling process.

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Pages : 8

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Détails

  • Titre original : Numerical research of driving mechanism for geyser developing in cryogenic propellant feedline.
  • Identifiant de la fiche : 30025916
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0949

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