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US 5,993,161 AGranted
Rotors with mistuned blades
AssigneeCalifornia Institute of Technology
InventorBenjamin Shapiro
Life of this patent
Estimating the term…
Abstract
A method for designing a mistuned rotor with improved stability and forced response.
Claims9
A method of designing and constructing a rotor having mistuned blades, comprising:
- selecting a system model that simulates aerodynamics of said rotor, said system model including a specified aerodynamic parameter indicative of an aerodynamic property of said rotor;
- applying a selected symmetry to said system model to simplify computation complexity of said system model;
- determining a correlation between said specified aerodynamic parameter and a mistuning parameter of said blades;
- and
- arranging said blades with respect to one another in a sequence based on said correlation such that said specified aerodynamic parameter is within a specified optimal range to improve a performance of said rotor.
2 more elements
A rotor, comprising:
- a rotor disk;
- and
- a total of r blades formed on said rotor disk and arranged symmetrically around said rotor disk, said blades having blade properties that are different from an ideal blade,
- wherein said blades are arranged in a following sequence
- z.sub.k+1 .gtoreq.z.sub.k .gtoreq.z.sub.k+2 .gtoreq.z.sub.k-1 .gtoreq. . . . .gtoreq.z.sub.r-1 .gtoreq.z.sub.2 .gtoreq.z.sub.r .gtoreq.z.sub.1,
- when r is an even number;
- or
- z.sub.k+1 .gtoreq.z.sub.k .gtoreq.z.sub.k+2 .gtoreq.z.sub.k-1 .gtoreq. . . . .gtoreq.z.sub.2 .gtoreq.z.sub.r-1 .gtoreq.z.sub.1 .gtoreq.z.sub.r,
- when r is an odd number, wherein z.sub.i indicates an amount of difference in ith blade compared to said ideal blade, and k is ##EQU18##
6 more elements
Dependencies are inferred from the claim text.