NDLI: Innovative LOX/Methane upper stage for future launchersInnovative LOx/methane upper stage for future launchers

Content Provider	IEEE Xplore Digital Library
Author	Calabro, M.
Copyright Year	2005
Description	Author affiliation: The Inner Arch, Villennes, France (Calabro, M.)
Abstract	The trend is today to research easy to use and cheap solutions for the propulsion of future expendable launch vehicles but also with a high level of performances. Another point is to look for non toxic propellants but able to operate in space for long duration mission and with a high level of performances: LOx Methane is a good compromise. A way could be an extensive use of composite materials both for the structures, the tanks and the engines with use, as much as possible of automatic processes. In a near future a breakthrough or improvement of the fibers strength may increase the interest of such technologies. Liquid composite wound tanks can weigh three to four times less than a metallic one under the same operating conditions, the same results can be obtained for the chambers; So these technologies give a new interest to pressure fed solutions (as a first approach Vacuum Specific Impulse depends mainly on engine area ratio and less on operating pressure). It could lead to a stage easy to operate, reliable, needing no costly solutions (Expander engine, Turbopumps, Boost pumps). On an upper stage with a full diameter tankage system (with a common bulkhead), the use of composite tanks is enabling creation of room, or all around the aft dome of the tank or in length (moreover mass of composite tanks is less sensitive than metallic ones to the shape). Creation of thrust depends mainly on the possibility of implementing nozzles divergent surfaces. On another side, thermal fluxes depend greatly on the operating pressure: low pressure engine no longer needs regenerative cooling system (radiation+ film or transpiration cooled ceramic engines could be used). Increase of throat area ratio is not a major problem with respect to the available room. Moreover stage without turbomachinery is much less sensitive to the mission profile and become much more competitive with a multi-boost mission. As a previous study showed the interest of these solutions with cryogenic upper stage, the aim of this presentation is to demonstrate the performance improvement by replacing a conventional low pressure-fed NTO/MMH upper stage by an all composite designed LOx/Methane pressure fed stages and so the interest for R&D on this field.
Starting Page	344
Ending Page	350
File Size	1044518
Page Count	7
File Format	PDF
ISBN	0780389778
DOI	10.1109/RAST.2005.1512589
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-09
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Propellants Composite materials Shape Cooling Space missions Vacuum technology Propulsion Wounds Engines Vehicles
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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