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    • 9. 发明授权
    • Airfoil embodying mixed loading conventions
    • 机翼体现混合装载规则
    • US07686567B2
    • 2010-03-30
    • US11303672
    • 2005-12-16
    • Eric A. GroverThomas J. Praisner
    • Eric A. GroverThomas J. Praisner
    • F04D27/02
    • F01D5/141F05D2250/71Y02T50/673Y10S416/02
    • A high-lift airfoil embodying a combination of loading conventions in a single design specifically to reduce and control total pressure losses that occur in the flow channels between airfoils employed in turbomachinery applications is disclosed herein. The mixed-loading high-lift airfoil designs embody and exhibit the best total profile and secondary loss characteristics possessed by both aft-loaded airfoil and front-loaded airfoil conventions through controlling the development and interaction of boundary layers forming along the surfaces of the airfoils and the endwalls in such applications. The mixed-loading high-lift airfoil may be utilized in both rotating and non-rotating turbomachinery applications.
    • 本文公开了一种实现单一设计中的装载约定的组合的高升力翼型,专门用于减少和控制在涡轮机械应用中使用的翼型之间的流动通道中发生的总压力损失。 混合装载的高升力翼型设计通过控制沿着翼型件的表面形成的边界层的发展和相互作用,体现并展现了后装翼型和前装翼型惯例所具有的最佳总轮廓和二次损失特性,以及 这些应用程序中的端壁。 混合装载的高升力翼型件可用于旋转和非旋转涡轮机械应用中。
    • 10. 发明授权
    • Boundary layer transition model
    • 边界层过渡模型
    • US07251592B1
    • 2007-07-31
    • US10921486
    • 2004-08-18
    • Thomas J. PraisnerEric A. Grover
    • Thomas J. PraisnerEric A. Grover
    • G06G7/48G06G7/50
    • G06F17/5018G06F2217/16
    • A method for analyzing performance of an airfoil includes determining: an estimated laminar separation location; a freestream turbulence intensity; a momentum thickness; and a turbulence length scale. Based upon the freestream turbulence intensity, momentum thickness, and turbulence length scale, a first momentum thickness Reynolds number associated with a first estimated laminar/turbulent boundary transition location along the airfoil is determined. If the estimated laminar separation location is downstream of the first estimated transition, the first estimated transition is used to determine a spatial domain for running a turbulent flow model. If the estimated laminar separation location is upstream of the first estimated transition, a second estimated transition location is used to determine a spatial domain for running the turbulent flow model. The second estimated transition location is determined as a function of a momentum thickness Reynolds number associated with the estimated laminar separation location.
    • 用于分析翼型件的性能的方法包括确定:估计的层流分离位置; 自由流湍流强度; 动量厚度; 和湍流长度尺度。 基于自由湍流强度,动量厚度和湍流长度尺度,确定与沿着翼型的第一估计层流/湍流边界转变位置相关联的第一动量厚度雷诺数。 如果估计的层流分离位置在第一估计转变的下游,则使用第一估计转换来确定用于运行湍流模型的空间域。 如果估计层流分离位置在第一估计转变的上游,则使用第二估计转换位置来确定用于运行湍流模型的空间域。 第二估计转换位置被确定为与估计层流分离位置相关联的动量厚度雷诺数的函数。