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    • 29. 发明授权
    • Method for reducing the vibration levels of a propfan of contrarotating bladed disks of a turbine engine
    • 一种用于降低涡轮发动机反转叶片盘的振动水平的方法
    • US08375698B2
    • 2013-02-19
    • US12548040
    • 2009-08-26
    • Jean-Pierre Francois LombardJerome Talbotec
    • Jean-Pierre Francois LombardJerome Talbotec
    • F01D25/04F02K3/072B21K25/00
    • F01D5/16F01D5/142F02K3/072F05D2200/20F05D2260/80F05D2260/96Y10T29/49321
    • A method for reducing the vibration levels likely to occur, in a turbine engine including a first and a second bladed disk forming a propfan of contrarotating disks, when the two disks are traversed by a gaseous fluid, because of the turbulence of aerodynamic origin generated by the second bladed disk on the first bladed disk is disclosed. The method includes defining an initial configuration of the blades, calculating the synchronous forced response on the first bladed disk as a function of the harmonic excitation force generated by the second bladed disk expressed as a linear function of the generalized aerodynamic force for the mode in question; for stacked sections of one of the two disks, determining a tangential geometric offset value θ of the individual aerodynamic profile to reduce the term corresponding to the generalized aerodynamic force; and applying a new configuration to the blades.
    • 一种用于减少可能发生的振动水平的方法,在涡轮发动机中,由于由气态流体产生的空气动力学原因的湍流,在涡轮发动机中,该涡轮发动机包括形成反转盘的螺旋桨的第一和第二叶片盘, 披露了第一个刀片盘上的第二个刀片盘。 该方法包括定义叶片的初始配置,根据第二叶片盘产生的谐波激励力计算第一叶片盘上的同步强制响应,其表示为所讨论模式的广义气动力的线性函数 ; 对于两个磁盘之一的堆叠部分,确定切向几何偏移值& 的个体空气动力学特性,以减少对应于广义气动力的术语; 并将新配置应用于刀片。