EXHAUST PIPE (VERSIONS), STIFFNESS MECHANISM FOR AN EXHAUST PIPE AND A METHOD FOR INCREASING THE RESONANCE FREQUENCY OF AN EXHAUST SYSTEM COMPRISING AN EXHAUST PIPE Russian patent published in 2020 - IPC F01N13/08 F02K1/48 B64D33/04 

FIELD: transport machine building.

SUBSTANCE: invention can be used in exhaust systems for aircrafts or other vehicles. Exhaust pipe (118) comprises wall portion (215) forming a channel having inlet portion (202) configured to receive an exhaust gas stream, and outlet part (204) made with possibility to exhaust gases flow and multiple corrugations (F). Corrugations (F) are formed on outlet part (204) and contain first corrugation (206) and second corrugation (208), spaced from first corrugation (206). First corrugation (206) has first vertex (216), first cavity (220), the first height and the first width perpendicular to the first height. Second corrugation (208) has second vertex (218), second cavity (222), the second height and the second width perpendicular to the second height. There is at least one retaining element connected to first recess (220) and second recess (222) passing parallel in at least one of the first width and the second width. Retaining member (400) is configured to restrain relative movement between first corrugation (206) and second corrugation (208) and relative movement between first corrugation (206), second corrugation (208) and at least one of said inlet part (202) and outlet part (204) during flow of exhaust gases through pipe (118). Disclosed are aircraft comprising exhaust system, stiffness mechanism for exhaust pipe, version of exhaust pipe, and a method for increasing the resonance frequency of the exhaust system.

EFFECT: technical result consists in limitation or retardation of movement of exhaust system, to ensure rigidity of exhaust system or part thereof, to increase natural frequency of exhaust system, and efficient mixing of hot exhaust air and cold ambient air.

22 cl, 13 dwg