1. Division of Combustion Physics, Lund University, P.O. Box 118, S-221 00 Lund, Sweden
2. Swedish Defence Research Agency, SE-164 90 Stockholm, Sweden
3. Department of Wind Energy, Section for Composites and Materials Mechanics, Technical University of Denmark, Risø Campus, Frederiksborgvej 399, DK-4000 Roskilde, Denmark