Cross bar centring mechanism for slave petals in convergent divergent nozzles with variable geometry

摘要

Divergent petal arrangement for convergent-divergent nozzles with thrust vectoring capability through changes in the divergent section geometry, in which the position of each slave divergent petals 4 is determined by a centring mechanism 31, made up by two centring bars 14 and 27 that sliding across the sled elements 17 and 18 of the master divergent petals 2, fix a centred axial position between divergent master petals 2 and by a hanger element 13 that colliding the stop elements 25 of the master divergent petals limits the displacement on another axial position, avoiding at the same time and in conjunction with the centring mechanism 31 the displacement of the slave divergent petal 4 away from the master petals 2 when the pressure forces act from the air towards the gas side.