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High-End Concept to Launch Micro-Satellites into Low-Earth-Orbit based on Combination of a Two-Stage Rocket and a Railgun System

Bozic, Ognjan and Longo, José M.A. and Giese, Peter and Behrens, Jörg (2004) High-End Concept to Launch Micro-Satellites into Low-Earth-Orbit based on Combination of a Two-Stage Rocket and a Railgun System. Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer Verlag. (In Press)

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Abstract

The electromagnetic railgun technology appears to be an interesting alternative to launch small payloads into Low Earth Orbit (LEO), as this may introduce lower launch costs. A high-end solution, based upon present state of the art technology, has been investigated to derive the technical conditions for the application of such a new system. This paper presents the main concept aspects of such propelled projectiles with special emphasis on flight mechanics, aero-/thermodynamics, materials and propulsion characteristics. Launch angles and trajectory optimization analyses are carried out by means of 3 degree of freedom simulations (3DOF). The aerodynamic form of the projectile is optimized to provoke minimum drag and low heat loads. The surface temperature distribution for critical zones is calculated with DLR developed Navier-Stokes codes TAU, HOTSOSE, whereas the engineering tool HF3T is used for time dependent calculations of heat loads and temperatures on project surface and inner structures. Furthermore, competing propulsions systems are considered for the rocket engines of both stages. The structural mass is analysed mostly on the basis of carbon fibre reinforced materials as well as classical aerospace metallic materials. Finally, this paper gives a critical overview of the technical feasibility and cost of small rockets for such missions.

Document Type:Article
Title:High-End Concept to Launch Micro-Satellites into Low-Earth-Orbit based on Combination of a Two-Stage Rocket and a Railgun System
Authors:
AuthorsInstitution or Email of Authors
Bozic, OgnjanUNSPECIFIED
Longo, José M.A.UNSPECIFIED
Giese, PeterUNSPECIFIED
Behrens, JörgEADS Space Transportation
Date:2004
Journal or Publication Title:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Refereed publication:Yes
In ISI Web of Science:Yes
Publisher:Springer Verlag
Status:In Press
Keywords:railgun, aerothermodynamics, hybrid rocket engine, orbital launcher
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - numerische Verfahren (old)
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Claudia Grant
Deposited On:20 Jan 2006
Last Modified:27 Apr 2009 04:55

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