The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2022
Filed:
Apr. 13, 2018
Siemens Energy Global Gmbh & Co. KG, Munich, DE;
Daniel M. Eshak, Orlando, FL (US);
Susanne Kamenzky, Berlin, DE;
Daniel Vöhringer, Berlin, DE;
Stefan Schmitt, Mülheim an der Ruhr, DE;
Heinrich Stüer, Haltern, DE;
Yuekun Zhou, Charlotte, NC (US);
Samuel R. Miller, Jr., Port St. Lucie, FL (US);
Siemens Energy Global GmbH & Co. KG, Munich, DE;
Abstract
A bladed rotor system includes first and second sets of blades with respective airfoils each having at least one internal cavity. The airfoils of both the first and second sets of blades have identical outer shapes defined by an outer surface of an outer wall of the respective airfoils. The airfoils of the first set of blades are distinguished from the airfoils of the second set of blades by a geometry and/or position of at the least one internal cavity, which is unique to blades of a given set. The natural frequency of a blade of the first set differs from the natural frequency of a blade of the second set by a predetermined amount. The blades of the first set and the second set are alternately arranged in a periodic fashion in said circumferential row, to provide a frequency mistuning to stabilize flutter of the blades.