公开(公告)号：US5702231A

公开(公告)日：1997-12-30

申请号：US694967

申请日：1996-08-09

Applicant: Robert P. Dougherty

Inventor： Robert P. Dougherty

IPC: B64C1/40 ,  B64D33/02 ,  F02C7/045 ,  F01D25/00 ,  F01N7/00

CPC classification number: B64D33/02 ,  F02C7/045 ,  B64D2033/0206

Abstract: Noise attenuating linings for a turbofan engine inlet are installed around the upper crown area and/or around the lower lip. The acoustical lining at the upper crown area attenuates those fan noise emissions which are normally reflected from the crown area downward toward the ground. The acoustical lining at the lower inlet lip attenuates those fan noise emissions which travel along the inner surface of the lip and are diffracted around the lower lip downward toward the ground.

Abstract translation: 用于涡轮风扇发动机入口的噪音衰减衬里安装在上冠区域周围和/或围绕下唇缘周围。 上冠区的声学衬里将通常从冠部区域向下朝向地面反射的那些风扇噪声排放物衰减。 下入口处的声学衬里使沿着唇缘内表面行进的那些风扇噪声辐射衰减，并沿下唇向下衍射到地面。

公开(公告)号：US5838284A

公开(公告)日：1998-11-17

申请号：US812818

申请日：1997-03-06

Applicant: Robert P. Dougherty

Inventor： Robert P. Dougherty

IPC: H01Q3/26 ,  H01Q3/38 ,  H01Q21/06 ,  H01Q21/20 ,  H01Q21/22 ,  H01Q21/24 ,  H04R1/40 ,  H01Q21/00

CPC classification number: H01Q3/26 ,  H01Q21/061 ,  H01Q21/22 ,  H04R1/403 ,  H04R2201/401 ,  H04R2201/405 ,  H04R2430/20

Abstract: A phased array design in the shape of a logarithmic spiral. By distributing the elements of the array along a logarithmic spiral-shaped curve, spatial regularities are avoided and the array is therefore able to function over a wide frequency range.

Abstract translation: 相对阵列设计为对数螺旋形。 通过沿着对数螺旋形曲线分布阵列的元素，避免了空间规则，因此该阵列能够在宽的频率范围内起作用。

公开(公告)号：US5915403A

公开(公告)日：1999-06-29

申请号：US60194

申请日：1998-04-14

Applicant: James M. McConachie ,  Margaret M. Curtin ,  Robert P. Dougherty ,  Michael L. Sangwin

Inventor： James M. McConachie ,  Margaret M. Curtin ,  Robert P. Dougherty ,  Michael L. Sangwin

IPC: B64D33/02 ,  F02C7/04 ,  F02C7/045

CPC classification number: F02C7/045 ,  B64D33/02 ,  F02C7/04 ,  B64D2033/0286 ,  Y02T50/671 ,  Y10T137/0536

Abstract: In a scarfed nacelle inlet for channeling airflow to an engine having a longitudinal center line axis (ENGINE C/L), the duct including a crown (26) and a keel (28), an improvement including an inlet with a biplanar forward hilite. When viewed in side elevation, the biplanar hilite includes a first portion (40) including the keel, a second portion (42) including the crown, and a transition region (44) between the first and second portions. The first and second portions (40), (42) are linear and the transition region (44) is a single arc. An imaginary intersection line (IP) between the first and second portions is located vertically about midway between the crown and the keel.

Abstract translation: 在用于将气流引导到具有纵向中心线轴线（发动机C / L）的发动机的分离的机舱入口中，所述管道包括冠部（26）和龙骨（28），改进包括具有双平面向前的小丘的入口。 当在侧视图中观察时，双平面叠层包括包括龙骨的第一部分（40），包括冠的第二部分（42）和在第一和第二部分之间的过渡区域（44）。 第一和第二部分（40），（42）是线性的，并且过渡区域（44）是单个弧。 第一和第二部分之间的假想交叉线（IP）位于冠部和龙骨之间的中间位置。