UB-FIRE Experiment Results on Upward Flame Propagation along Cylindrical PMMA Samples in Reduced Gravity

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dc.creatorMeyer, Florian
dc.creatorSchwenteck, Tim
dc.creatorRuhe, Maximilian
dc.creatorBihn, Patrick
dc.creatorFreier, Alex
dc.creatorEigenbrod, Christian
dc.date.accessioned2017-07-06T17:37:01Z
dc.date.available2017-07-06T17:37:01Z
dc.date.issued2017-07-16
dc.descriptionFlorian Meyer, University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), Germany
dc.descriptionTim Schwenteck, University of Bremen, Germany
dc.descriptionMaximilian Ruhe, University of Bremen, Germany
dc.descriptionPatrick Bihn, University of Bremen, Germany
dc.descriptionAlex Freier, University of Bremen, Germany
dc.descriptionChristian Eigenbrod, University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), Germany
dc.descriptionICES509: Fire Safety in Spacecraft and Enclosed Habitats
dc.descriptionThe 47th International Conference on Environmental Systems was held in South Carolina, USA on 16 July 2017 through 20 July 2017
dc.description.abstractAiming for improvements on fire safety in human spaceflight, upward flame propagation is examined on three different cylindrical PMMA rods during the REXUS 20 sounding rocket mission within the UB-FIRE project. The rods are of identical diameter of 15 mm with a reference sample of a smooth surface, one sample featuring vertical grooves and one sample exhibiting two vertical ribs. The concurrent flow of air is identical for all three samples with 18 cm/s velocity which is comparable to air conditioning flow velocities in space habitats like the International Space Station. The advantage of the cylindrical shape is that no border effects occur. The leading edge of the pyrolysis front is observed by means of an infrared camera centrally mounted between the surrounding wind tunnels alternately looking to the individual samples. The UB-FIRE experiment, flown on REXUS 20 in a reduced gravity environment (~0.094 g), reveals a reduced pyrolysis front propagation velocity up to a factor of 0.28 compared to ground-based experiments with an identical test setup (NASA-STD-6001B test 1). However, the corrugation effect which affects the propagation velocity is different in a reduced gravity environment compared to 1g. Possible reasons for this behavior along with a detailed evaluation of each sample are discussed in this paper. The 1g results are used to develop and validate an empirical model for the flame propagation along structured surfaces of several shapes.
dc.format.mimetypeapplication/pdf
dc.identifier.otherICES_2017_98
dc.identifier.urihttp://hdl.handle.net/2346/72921
dc.language.isoeng
dc.publisher47th International Conference on Environmental Systems
dc.subjectfire safety
dc.subjectmicrogravity
dc.subjecthuman spaceflight
dc.subjectPMMA
dc.subjectupward flame propagation
dc.subjectsounding rocket
dc.titleUB-FIRE Experiment Results on Upward Flame Propagation along Cylindrical PMMA Samples in Reduced Gravityen_US
dc.typePresentations

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