公开(公告)号：US20160160797A1

公开(公告)日：2016-06-09

申请号：US14904330

申请日：2014-07-15

Applicant: SNECMA

Inventor： Jonathan LANGRIDGE ,  Julien SZYDLOWSKI

IPC: F02K1/44

CPC classification number: F02K1/44 ,  F02K1/34 ,  F02K1/386 ,  F02K1/46 ,  F05D2250/11 ,  F05D2250/183 ,  F05D2250/184 ,  F05D2250/323 ,  F05D2250/324 ,  F05D2250/711 ,  F05D2250/712 ,  F05D2260/96

Abstract: A nozzle of a turbomachine is provided with chevrons with a non-axisymmetric inner face. A cover for the nozzle of longitudinal axis L-L includes an internal wall having a section with a predetermined abscissa on the L-L axis defining, on the wall, a neck line. The cover has, downstream from the abscissa, indentations in the trailing edge of the cover delimiting chevrons distributed in the circumferential direction, in which, on the cover, from the abscissa the internal wall moves away radially towards the outside of the upstream tangent, to the top of an indentation, the outer wall of the cover moves towards the upstream tangent to the top of an indentation, and the internal wall moves away radially towards the inside of the upstream tangent, to the tip of a chevron.

Abstract translation: 涡轮机的喷嘴设置有具有非轴对称内表面的人字纹。 用于纵向轴线L-L的喷嘴的盖包括内壁，其具有在L-L轴上具有预定横轴的部分，在壁上限定颈部线。 盖子在横向方向的下游具有沿着圆周方向分隔的人字形的后缘上的凹口，其中，在盖子上，从横坐标的角度看，内壁朝向上游切线的外侧径向移动到 凹陷的顶部，盖的外壁朝向凹陷顶部的上游切线移动，并且内壁朝向上游切线的内侧径向移动到人字形的尖端。

公开(公告)号：US20160215727A1

公开(公告)日：2016-07-28

申请号：US14914235

申请日：2014-09-09

Applicant: SNECMA

Inventor： Jonathan LANGRIDGE ,  Guillaume BODARD ,  Irwin KERNEMP ,  Maxime KOENIG ,  Julien SZYDLOWSKI

IPC: F02K1/34 ,  F02K1/38

CPC classification number: F02K1/34 ,  F02K1/386 ,  F02K1/48 ,  F05D2260/96

Abstract: The invention concerns an afterbody for a mixed-flow turbojet engine having a central axis (LL), comprising a lobed mixer (6), having alternating hot lobes (12) projecting into the secondary flow (F2) and cold lobes (13) penetrating into the primary flow (F1), and a nozzle (1) comprising, on the trailing edge (14) of same, longitudinal indentations (15) defining a crown of noise-reducing chevrons (7), characterised in that, at a predefined abscissa (X5) on the central axis (LL) downstream from the lobed mixer (6), the inner wall (2) of the nozzle (1) has a neck where the surface area of the transverse passage section of a flow into the nozzle passes through a minimum, and in that, downstream from this predefined abscissa (X5), the radius of the inner wall (2) of the nozzle (1) varies between the indentations (15) and the chevrons (7) so as to produce, in the flow, in the vicinity of said crown of chevrons (7), azimuth fluctuations of the Mach number. It also concerns a method for designing such an afterbody that comprises setting the azimuth of the lobed mixer (6) and of the chevrons (7).

Abstract translation: 本发明涉及一种具有中心轴线（LL）的混合涡轮喷气发动机的后箱，包括一个具有突出于二次流（F2）中的交替热叶片（12）和叶片（13）的叶状混合器（6） 在主流体（F1）中，以及喷嘴（1），其在其后缘（14）上包括限定减噪人字形（7）的冠部的纵向凹口（15），其特征在于，在预定义 横轴（X5）在叶片混合器（6）下游的中心轴线（LL）上，喷嘴（1）的内壁（2）具有颈部，其中流入喷嘴的流动横截面的表面积 （X5）的下游，喷嘴（1）的内壁（2）的半径在凹陷（15）和人字形（7）之间变化，从而产生 ，在流动中，在所述人字形冠（7）附近，马赫数的方位波动。 它还涉及一种用于设计这样的后体的方法，其包括设定叶片混合器（6）和人字形（7）的方位角。

公开(公告)号：US20130206865A1

公开(公告)日：2013-08-15

申请号：US13764125

申请日：2013-02-11

Applicant: SNECMA

Inventor： Julien SZYDLOWSKI ,  Guillaume BODARD ,  Matthieu LEYKO ,  Jonathan LANGRIDGE

IPC: F02K1/48

CPC classification number: F02K1/48 ,  A45D34/00 ,  A45D40/00 ,  F02K1/386 ,  F02K1/46 ,  F05B2250/611 ,  F05D2240/127 ,  F05D2250/323 ,  F05D2260/96 ,  F05D2270/20 ,  Y10T29/49826

Abstract: According to the invention, the method for defining the shape of a convergent-divergent nozzle of longitudinal axis L-L comprising a convergent part connected, at a throat, to a divergent part the downstream free end of which comprises scallops delimiting noise-reducing chevrons distributed in the circumferential direction,comprises defining beforehand the divergent part of the nozzle using a divergent first portion, a divergent second portion and a convergent portion, attributing an initial value to dimensional parameters defining the chevrons and the three portions, calculating performance criteria and checking that the calculated performance criteria satisfy predefined performance conditions.

Abstract translation: 根据本发明，用于定义纵向轴线LL的会聚发散喷嘴的形状的方法包括在喉部处连接到其下游自由端的发散部分的收敛部分，该收敛部分包括分隔在其中的减少噪音的人字形的扇贝 圆周方向包括使用发散的第一部分，发散的第二部分和收敛部分事先确定喷嘴的发散部分，将初始值归因于定义人字形和三部分的尺寸参数，计算性能标准并检查 计算的性能标准满足预定义的性能条件。