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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2019027382
pages 263-286

EXPERIMENTAL STUDY OF A LASER IGNITED THRUSTER WITH A POROUS INJECTOR HEAD

Michael Börner
DLR German Aerospace Center, Lampoldshausen, Baden-Württemberg, 74239, Germany
Jan C. Deeken
Institute of Space Propulsion, German Aerospace Center (DLR), Germany
Chiara Manfletti
Institute of Space Propulsion, German Aerospace Center (DLR), Germany
Michael Oschwald
DLR German Aerospace Center, Lampoldshausen, Baden-Württemberg, 74239, Germany

RÉSUMÉ

This paper reports the investigation of the laser ignition of a breadboard thruster with a porous injector head. Ignition tests were performed for 80 and 980 mbar combustion chamber pressure before injection of propellants, for the two combinations LOX/H2 and LOX/CH4 and for two ignition locations. The propellant injection, the resulting flow field, the ignition, and the flame development were monitored by a combined Schlieren- and OH*-diagnostics setup for each of the eight test configurations. The minimum laser pulse energies for successful ignition of 0.8 mJ up to 17.9 mJ were determined and depend strongly on the fuel used and the location of ignition. The tests proved the compatibility of the laser ignition technology and the porous injector concept which widens the applicability of laser ignition to this injector design for LOX/H2 and LOX/CH4 for sea level and in space pressure conditions.


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