Patent ID: 7581400
Filing Date: 2009-09-01
Classification: B64D,F02K,Y02T,Y10T

Abstract:
1. A propulsion gas exhaust assembly for an aircraft, comprising: a gas generator providing a hot gas and having a hot zone surface; a first cylindrical duct disposed downstream of the gas generator and configured to guide the hot gas from the gas generator, a first geometric plane being parallel to the axis of the first cylindrical duct and intersecting the first cylindrical duct, the first geometric plane having a branch-one side and a branch-two side, a second geometric plane being orthogonal to the first geometric plane and containing the entire axis of the first cylindrical duct, the second geometric plane having a first side and a second side; a second duct branch-one disposed downstream of the first cylindrical duct and configured to guide a first gas portion from the first cylindrical duct, keep the first gas portion on the branch-one side, and to guide the first gas portion away from the second geometric plane; a second duct branch-two disposed downstream of the first cylindrical duct and configured to guide a second gas portion from the first cylindrical duct, keep the second gas portion on the branch-two side, and to guide the second gas portion away from the second geometric plane, the first and second gas portions are fully on separate sides of the second geometric plane when they exit from the second duct branch-one and the second duct branch-two respectively; a branch-one nozzle disposed downstream of the second duct branch-one and which guides the first gas portion outside the assembly in a direction substantially parallel to the axis of the first cylindrical duct; a branch-two nozzle disposed downstream of the second duct branch-two and which guides the second gas portion outside the assembly in the direction substantially parallel to the axis of the first cylindrical duct; and a third duct branch-one disposed downstream of the second duct branch-one and upstream of the branch-one nozzle, wherein the assembly being configured to allow the first gas portion to enter into and exit from the third duct branch-one in an axial direction, the axial direction being parallel to the axis of the first cylindrical duct, the third duct branch-one having a branch-one elbow configured to guide the first gas portion away from the first geometric plane to a maximum offset position before guiding the first gas portion to a new first offset position closer to the first geometric plane, and wherein the hot zone surface is masked from a view directed upstream into the branch-one nozzle.