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    • 4. 发明授权
    • Turbine blades and methods of manufacturing
    • 涡轮叶片及制造方法
    • US08206108B2
    • 2012-06-26
    • US11953489
    • 2007-12-10
    • Ardeshir RiahiKin PoonDavid ChouMalak F. Malak
    • Ardeshir RiahiKin PoonDavid ChouMalak F. Malak
    • F01D5/18
    • F01D5/147F01D5/18F01D5/20F05D2230/10F05D2230/211F05D2240/307Y02T50/676
    • A turbine blade includes a convex suction side wall, a concave pressure side wall, a tip wall, an internal cooling circuit, and a plurality of tip edge channels. The tip wall is recessed from a first tip edge of the suction side wall and a second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, and the suction side wall tip section is shorter than the pressure side wall tip section. The internal cooling circuit is formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall. The plurality of tip edge channels formed through the first tip edge of the convex suction side wall extend to the internal cooling circuit. Methods of manufacturing turbine blades are also provided.
    • 涡轮叶片包括凸吸入侧壁,凹压侧壁,尖端壁,内部冷却回路和多个尖端边缘通道。 顶壁从吸力侧壁的第一顶端边缘和凹压侧壁的第二顶端边缘凹入,以限定吸入侧壁顶端部分和压力侧壁顶端部分,并且吸力侧壁顶端部分是 比压力侧壁末端部分短。 内部冷却回路至少部分形成在凸吸入侧壁,凹压侧壁与顶壁之间。 通过凸形吸入侧壁的第一顶端边缘形成的多个尖端边缘通道延伸到内部冷却回路。 还提供制造涡轮叶片的方法。
    • 5. 发明授权
    • Equalization for DMT and OFDM communication systems
    • DMT和OFDM通信系统的均衡
    • US07433398B2
    • 2008-10-07
    • US10889530
    • 2004-07-12
    • Fa-Long LuoDavid Chou
    • Fa-Long LuoDavid Chou
    • H03K5/159
    • H04L25/03012H04L25/03159H04L2025/03414H04L2025/03445H04L2025/03522
    • The invention provides a DMT or OFDM equalization system that deals with each tone not only separately, but also globally, which provides better overall performance. In the inventive system, only M+T variables are required to be determined, where M is the number of tones and T represents the number of SIRF taps. The invention defines a matrix R, in which optimal coefficients are found as the eigenvector corresponding to the smallest eigenvalue of the matrix R. The dynamic range of all variables is limited in a system in accordance with the present invention, which provides ease of hardware implementation. Furthermore, the inventive system retains the advantages of per-tone equalization by providing a smoother signal-to-noise ratio (SNR) distribution function versus synchronization delay. In addition, no effort is wasted on the equalization of unused tones, because it is unnecessary to determine the coefficients for unused tones.
    • 本发明提供了一种DMT或OFDM均衡系统,其不仅分别地,而且全局地处理每个音调,这提供了更好的整体性能。 在本发明的系统中,仅需要确定M + T个变量,其中M是音调的数量,T表示SIRF抽头的数量。 本发明定义了矩阵R,其中找到最佳系数作为与矩阵R的最小特征值对应的特征向量。所有变量的动态范围在根据本发明的系统中受到限制,这提供了硬件实现的容易性 。 此外,本发明的系统通过相对于同步延迟提供更平滑的信噪比(SNR)分布函数来保留每个音调均衡的优点。 此外,由于不需要确定未使用音调的系数,因此不会浪费对未使用音调的均衡。
    • 10. 发明授权
    • Turbine blades, turbine assemblies, and methods of manufacturing turbine blades
    • 涡轮叶片,涡轮组件以及制造涡轮叶片的方法
    • US08777567B2
    • 2014-07-15
    • US12888202
    • 2010-09-22
    • Kin PoonMalak Fouad MalakArdeshir RiahiDavid Chou
    • Kin PoonMalak Fouad MalakArdeshir RiahiDavid Chou
    • F01D5/20F01D5/18
    • F01D5/20F01D5/187Y02T50/673Y02T50/676Y10T29/49341
    • A turbine blade includes a first side wall including a first tip edge, a second side wall opposite the first side wall and including a second tip edge, a tip wall between the first and second side walls, the tip wall recessed from the first tip edge of the first side wall and the second tip edge of the second side wall forming a coolant cavity, a tip recess cavity, a first parapet wall on the first side wall, and a second parapet wall on the second side wall, the coolant cavity defined by the tip wall, and the tip recess cavity defined by the tip wall, and the first and second parapet walls, a step formed between the first tip edge and the tip wall, a cooling hole through the first parapet wall, the step, and the tip wall, the cooling hole including an open and a closed channel section.
    • 涡轮叶片包括第一侧壁,其包括第一末端边缘,与第一侧壁相对的第二侧壁,并且包括第二末端边缘,位于第一和第二侧壁之间的末端壁, 所述第一侧壁和所述第二侧壁的所述第二末端边缘形成冷却剂腔,所述顶部凹陷空腔,所述第一侧壁上的第一栏杆壁和所述第二侧壁上的第二护墙壁,所述冷却剂腔被限定 由尖端壁和由尖端壁限定的尖端凹部空腔以及第一和第二护墙壁,在第一顶端边缘和尖端壁之间形成的台阶,穿过第一栏杆壁的冷却孔,台阶和 尖端壁,冷却孔包括开放和封闭的通道部分。