%0 Journal Article %T Analysis of Particle Motion in Wall-Free Concentrated Vortexes in Relation to Flight Safety Problem %A Varaksin, A.Y. %A Protasov, M.. %K flight safety, vortex flows, particles motion in wall-free vortexes, ingestion in aircraft engines. %J Safety in Technosphere %D 2014 %N 3 %P 5 %I INFRA-M Academic Publishing LLC.