Biconical exhaust cone for a civil aviation jet engine

摘要

A biconical exhaust cone 4 for a civil aviation jet engine, this cone delimiting, on its outside, an annular exhaust stream of combustion gases and comprising an upstream frustoconical portion 6 extending outward from upstream to downstream, and a downstream frustoconical portion 8 extending inward from upstream to downstream. The downstream portion comprises a segment 10 which defines an outer annular surface of which one tangent 12, 14, at any point X1, X2 along the longitudinal axis X of the cone, is inclined by an angle α, α greater than 40° and less than 90° with respect to this longitudinal axis. The value of the angle of inclination of the tangent may vary from point to point along the longitudinal axis. The exhaust cone may be a non-truncated type. The Jet engine may be of a bypass type.