公开(公告)号：EP2971722A4

公开(公告)日：2016-08-31

申请号：EP14768361

申请日：2014-02-19

申请人： NORTHROP GRUMMAN SYSTEMS CORP

发明人： BUNNAG SHANE ,  HALL GORDON ,  STROMINGER KELLY ,  TAPEE JOHN ,  TROIA TRAJEEN J

IPC分类号： F02K1/00 ,  F02K1/78

CPC分类号： F02K1/00 ,  F02K1/78 ,  Y10T29/49 ,  Y10T29/49323 ,  Y10T29/49346

摘要： The construction of an internal/external single expansion ramp nozzle (nxSERN), and method of designing the same, is provided. Initial design parameters for primary stream construction are selected and additional parameters are determined by isentropic relations using the selected design parameters and Prandtl-Meyer function. The nozzle throat input and output angles are determined and used to define an initial portion of the nozzle primary stream lower expansion surface. The nozzle primary stream upper expansion surface and an aft portion of the primary stream lower expansion surface are defined using a method of characteristics. Initial and aft portions of the primary stream lower expansion surface are then connected by a straight line to define the primary stream nozzle.

摘要翻译： 提供了内部/外部单个膨胀斜面喷嘴（nxSERN）的结构及其设计方法。 选择初级流构造的初始设计参数，并使用选定的设计参数和Prandtl-Meyer函数通过等熵关系确定附加参数。 喷嘴喉部输入和输出角度被确定并用于限定喷嘴主流下部膨胀表面的初始部分。 使用特征的方法来限定喷嘴主流上部膨胀表面和主流下部膨胀表面的后部。 然后通过直线连接主流下部膨胀表面的初始和后部以限定主流喷嘴。