公开(公告)号：US10036349B2

公开(公告)日：2018-07-31

申请号：US14916467

申请日：2014-09-05

Applicant: SNECMA ,  AIRCELLE

Inventor： Irwin Kernemp ,  Jonathan Langridge ,  Sébastien Pascal ,  Denis Guillois ,  Gérard Clere ,  Loïc Chapelain

IPC: F02K1/48 ,  F02K1/82 ,  F02K1/60 ,  F02K1/62 ,  F02K1/76

CPC classification number: F02K1/48 ,  F02K1/60 ,  F02K1/62 ,  F02K1/763 ,  F02K1/827 ,  F05D2250/182

Abstract: An afterbody for a turbojet engine having a central axis, provided with a nozzle comprising two doors facing each other between two lateral beams. The doors pivot around axes defining a pivot direction, between a retracted position, in which a middle portion of the downstream edge of the doors forms the edge of the outlet section of the nozzle combined with the downstream edges of the two lateral beams, and a deployed position, in which the middle portions of the downstream edges of the pivoting doors come together so as to block the channel between the two lateral beams in order to reverse the thrust of the turbojet engine gases. The edge of the outlet section of the nozzle further having a crown of noise-reducing chevrons alternating with indentations and the afterbody.

公开(公告)号：US20160215728A1

公开(公告)日：2016-07-28

申请号：US14916467

申请日：2014-09-05

Applicant: SNECMA ,  AIRCELLE

Inventor： Irwin Kernemp ,  Jonathan Langridge ,  Sébastien Pascal ,  Denis Guillois ,  Gérard Clere ,  Loïc Chapelain

IPC: F02K1/48 ,  F02K1/62 ,  F02K1/76

CPC classification number: F02K1/48 ,  F02K1/60 ,  F02K1/62 ,  F02K1/763 ,  F02K1/827 ,  F05D2250/182

Abstract: An afterbody for a turbojet engine having a central axis, provided with a nozzle comprising two doors mounted facing each other between two lateral beams pivoting around axes defining a pivot direction, between a retracted position, in which a middle portion of the downstream edge of said doors forms the edge of the outlet section of the nozzle combined with the downstream edges of the two lateral beams, and a deployed position, in which said middle portions of the downstream edges of the pivoting doors come together so as to block the channel between the two lateral beams in order to reverse the thrust of the turbojet engine gases, the edge of the outlet section of the nozzle further having a crown of noise-reducing chevrons alternating with indentations and the afterbody wherein each noise-reducing chevron formed on the middle portion of the downstream edge of a pivoting door is opposite an indentation in the middle portion of the other pivoting door in the direction perpendicular to said pivot direction, the shapes of the chevrons and of the indentations being defined to match in such a way that each chevron fits into the opposing indentation when the pivoting doors are deployed.

Abstract translation: 一种用于具有中心轴的涡轮喷气发动机的后箱，其具有喷嘴，所述喷嘴包括两个门，所述两个门在两个横向梁之间彼此面对，所述两个侧壁在围绕枢轴方向的轴线枢转的两个横向梁之间，在缩回位置之间， 门形成喷嘴的出口部分的边缘与两个横向梁的下游边缘组合，并且展开位置，枢转门的下游边缘的所述中间部分聚集在一起，以便阻挡在两个横梁之间的通道 两个横梁为了扭转涡轮喷气发动机气体的推力，喷嘴的出口部分的边缘还具有与压痕交替的减噪人字形冠和后体，其中形成在中间部分上的每个减噪人字形 枢转门的下游边缘在另一个枢转门的中间部分的垂直方向上的凹陷相对 所述枢转方向，所述人字形的形状和所述凹口的形状被限定为使得当枢转门被展开时每个人字形装配到所述相对的凹口中。