利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

50 条记录 (耗时 0.019 秒)

    Mitigation of unsteady peak fan blade and disc stresses in turbofan engines through the use of flow control devices to stabilize boundary layer characteristics
    1.
    发明授权
    Mitigation of unsteady peak fan blade and disc stresses in turbofan engines through the use of flow control devices to stabilize boundary layer characteristics 有权
    通过使用流量控制装置来稳定边界层特性，减轻涡轮风扇发动机中不稳定的峰值风扇叶片和圆盘应力

    公开(公告)号：US07878759B2

    公开(公告)日：2011-02-01

    申请号：US10710723

    申请日：2004-07-30

    申请人： Robert J. Mills ,  Preston A. Henne

    发明人： Robert J. Mills ,  Preston A. Henne

    IPC分类号： F01D5/14

    CPC分类号： F04D29/384 ,  F01D5/145 ,  F04D29/668 ,  F04D29/681 ,  F05D2240/31 ,  F15D1/12 ,  Y02T50/673

    摘要： Method and apparatus for providing a turbofan blade 40 adapted to initiate and control a boundary layer transition at a side surface of the blade 40 during operation as a component in a turbofan assembly 35. The turbofan blade 40 includes a leading edge 55, a trailing edge 58, and two side surfaces including a high-pressure side surface 49 and a low-pressure side surface 52. At least one of the two side surfaces has an essentially smooth surface portion 61 located between the leading and trailing edges, and the essentially smooth surface portion is interrupted by a surface deviation 64. The surface deviation is configured to fix a positionally unstable laminar to turbulent boundary layer transition 24 at a location toward the trailing edge from the surface deviation during operation of the turbofan blade in the turbofan assembly. In this manner, fatigue inducing and/or structurally damaging unsteady aerodynamic forces experienced upon the blade and/or fan disc during operation are controlled, and the resultant fluctuating fan blade and disc peak stresses are mitigated.

    摘要翻译： 用于提供涡轮风扇叶片40的方法和装置，其适用于在作为涡扇风扇组件35中的部件操作期间启动和控制在叶片40的侧表面处的边界层转变。涡扇叶片40包括前缘55，后缘 58和包括高压侧表面49和低压侧表面52的两个侧表面。两个侧表面中的至少一个具有位于前缘和后缘之间的基本平滑的表面部分61，并且基本上平滑 表面部分被表面偏差64中断。表面偏差被配置为在涡轮风扇组件中的涡轮风扇叶片的操作期间，将位置不稳定的层流固定在位于朝向后缘的位置处的湍流边界层过渡部24。 以这种方式，控制在操作期间在叶片和/或风扇盘上经历的疲劳诱导和/或结构损坏的非稳态空气动力，并且减轻所产生的波动的风扇叶片和盘峰值应力。

    Book rack and pencil tray combination
    3.
    发明授权
    Book rack and pencil tray combination 有权
    书架和铅笔托盘组合

    公开(公告)号：US07281476B2

    公开(公告)日：2007-10-16

    申请号：US10712286

    申请日：2003-11-12

    申请人： Robert J. Mills ,  Peter Glass

    发明人： Robert J. Mills ,  Peter Glass

    IPC分类号： A47B57/00 ,  A47B85/00 ,  A47B83/00

    CPC分类号： B43M99/008 ,  A47B41/00

    摘要： A book rack and pencil tray combination has a book rack and a pencil case attached to the bottom wall of the book rack. The pencil case is optionally attached to the bottom wall of the book rack by a pencil case attachment plate attached to the bottom wall of the pencil case. The pencil case attachment plate is typically attached to the bottom wall of the pencil case such that a portion of the bottom wall of the book rack is sandwiched between the pencil case attachment plate and the bottom wall of the pencil case.

    摘要翻译： 书架和铅笔托盘组合有书架和附在书架底壁上的铅笔盒。 铅笔盒可选地通过附接到铅笔盒的底壁的铅笔盒附件板附接到书架的底壁。 铅笔盒安装板通常安装在铅笔盒的底壁上，使得书架的底壁的一部分被夹在铅笔盒安装板和铅笔盒的底壁之间。