On the request of CNES, ESA/ESTEC has led a study on the disposal of the hydrazine reservoirs of the Ariane 5 Attitude Control System (SCA). ESTEC has asked ONERA to propose an experimental assessment of risks of icing in piping and of generation of large debris in space during the process. After an examination of test conditions that would be representative of the reality, some campaigns have been realized at ONERA-Center of the Fauga-Mauzac. The objectives were the validation of the disposal system conceived for the SCA, also the general understanding of phenomena and consecutively a definition of the general trends to observe for ejection of liquids in space, and the constitution of a validation database for the modeling of hydrazine venting Validation tests of the flight ejector performed with hydrazine have demonstrated that the passivation process could be done without obstructing the piping. Further tests proved that this kind of phenomenon could be simulated without hazards by using water as similarity fluid. An effervescent type injector could be appropriate in order to guarantee a fine pulverization of a liquid ejected in a vacuum.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.