Stabilization and steering of a parabolic laser thermal thruster with an ignition device
Scharring, Stefan and Hoffmann, Daniela and Eckel, Hans-Albert and Röser, Hans-Peter (2009) Stabilization and steering of a parabolic laser thermal thruster with an ignition device. Acta Astronautica, 65 (11-12), pp. 1599-1615. Elsevier Ltd.. DOI: 10.1016/j.actaastro.2009.04.007. ISSN 0094-5765.
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Official URL: http://dx.doi.org/10.1016/j.actaastro.2009.04.007
High energy pulses of a CO2 laser are focused in a parabolic mirror yielding to a laser-supported detonation. The generated thrust acting on the reflector as a bell nozzle is studied in multiple pulse free flight experiments with respect to axial, lateral and angular momentum coupling. The employment of an ignition pin on the reflector’s axis of symmetry lowering the ignition threshold by several orders of magnitude is found to provide for a reproducible detonation process. The axial momentum coupling of each pulse is analyzed with respect to initial lateral offset and tilt during the flight. Highspeed analyses of recorded flights indicate that lateral momentum components occur re-centering the thruster on the beam. Thrust vector steering can be realized by tilt of the ignition pin inside the thruster, thus shifting the detonation. A design model of a laser-driven rocket including a remotely accessible steering gear was developed and tested successfully.
|Title:||Stabilization and steering of a parabolic laser thermal thruster with an ignition device|
|Date:||20 May 2009|
|Journal or Publication Title:||Acta Astronautica|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1599-1615|
|Series Name:||Elsevier Engineering|
|Keywords:||Laser propulsion; Lightcraft; Parabolic thruster; Beamriding; Steering; Impulse coupling|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L AR - Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Stefan Scharring|
|Deposited On:||14 Oct 2009 10:09|
|Last Modified:||26 Mar 2013 13:10|
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