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1.发明授权公开(公告)号：US08286347B2
公开(公告)日：2012-10-16
申请号：US12035966
申请日：2008-02-22
CPC分类号： F01D5/142 , F01D5/16 , Y10T29/49316 , Y10T29/4932 , Y10T29/49321 , Y10T29/49327
摘要： A method for reducing vibration levels in a turbomachine including at least a first and a second bladed wheel, due to aerodynamic perturbations that are produced by the second bladed wheel or an obstacle on the first bladed wheel is disclosed. The method includes: defining an initial configuration of the blades; calculating the synchronous forced response on the first bladed wheel as a function of the harmonic excitation force produced by the second bladed wheel expressed in the form of a linear function of the generalized aerodynamic force for the mode considered; determining a geometric tangential shift value θ for the stacked cross sections of one of the two wheels to reduce the corresponding term to the generalized aerodynamic force. The set of cross sections with the tangential shifts thus defines a new configuration of the blades of one of the two wheels.
摘要翻译： 公开了一种用于减少包括至少第一和第二叶轮的涡轮机中的振动水平的方法，这是由于由第二叶轮产生的空气动力扰动或第一叶片轮上的障碍物。 该方法包括：定义刀片的初始配置; 根据所考虑的模式的广义气动力的线性函数的形式，计算第一叶片轮上的同步强制响应作为由第二叶片轮产生的谐波激励力的函数; 确定几何切向位移值＆amp; 对于两个车轮之一的堆叠横截面，将相应的术语减小到广义气动力。 因此，具有切向位移的一组横截面限定了两个轮之一的叶片的新构造。
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公开(公告)号：US20080206058A1
公开(公告)日：2008-08-28
申请号：US12035966
申请日：2008-02-22
CPC分类号： F01D5/142 , F01D5/16 , Y10T29/49316 , Y10T29/4932 , Y10T29/49321 , Y10T29/49327
摘要： The present invention concerns a method for reducing vibration levels likely to occur in a turbomachine comprising at least a first and a second bladed wheel, where the two wheels are moving relative to one another about an axis of rotation and a gaseous fluid is passing over them, due to perturbations of an aerodynamic origin that are produced by the second bladed wheel or an obstacle on the first bladed wheel. The method includes the following steps in the design of said two bladed wheels: an initial configuration of the blades is defined; the synchronous forced response on the first bladed wheel is calculated as a function of the harmonic excitation force produced by the second bladed wheel expressed in the form of a linear function of the generalized aerodynamic force for the mode considered; a geometric tangential shift value θ is determined for the stacked cross sections of one of the two wheels so as to reduce the corresponding term to the generalized aerodynamic force. The set of cross sections with the tangential shifts thus defines a new configuration of the blades of said one of the two wheels which is applied to the blades of said one of the two wheels.
摘要翻译： 本发明涉及一种用于减少可能发生在包括至少第一和第二叶轮的涡轮机中的振动水平的方法，其中两个轮相对于彼此围绕旋转轴线移动并且气体流体在它们之上 由于由第二叶轮产生的空气动力学起源或第一叶片轮上的障碍物的扰动。 该方法在所述两个叶片轮的设计中包括以下步骤：定义叶片的初始构型; 计算第一叶轮上的同步强制响应作为由所考虑的模式的广义气动力的线性函数形式表示的第二叶轮产生的谐波激励力的函数; 为两个车轮之一的堆叠横截面确定几何切向偏移值θ，以便将相应的术语减小到广义气动力。 具有切向位移的一组横截面因此限定了施加到两个车轮中的一个的叶片上的两个车轮之一的叶片的新构造。
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