公开(公告)号：US20140090359A1

公开(公告)日：2014-04-03

申请号：US14035113

申请日：2013-09-24

Applicant: SNECMA

Inventor： Norman JODET ,  Guillaume BODARD ,  Cyprien Georges Eric HENRY ,  Maxime KOENIG

IPC: F02K1/34

CPC classification number: F02K1/34 ,  F02K1/48 ,  Y02T50/671

Abstract: The invention provides a mixer for a confluent-flow nozzle of a turbine engine, the mixer comprising an annular cap designed to be centered on a longitudinal axis of the nozzle and having a stationary upstream portion and a downstream portion that is movable in rotation about the longitudinal axis relative to the stationary portion, the movable portion of the cap terminating at its downstream end in inner lobes alternating circumferentially with outer lobes, and means for imparting reciprocating rotary motion to the movable portion of the cap.

Abstract translation: 本发明提供了一种用于涡轮发动机的汇流流动喷嘴的混合器，该混合器包括设计成以喷嘴的纵向轴线为中心的环形盖，并具有固定的上游部分和可围绕 纵向轴线相对于静止部分，帽的可移动部分在其下部端部终止于内部裂片，其周向与外部凸角交替，以及用于向帽的可移动部分进行往复旋转运动的装置。

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。