Experimental Determination of Natural Forms of Vibration in Blade Rows When Flutter Is Present in the Blades
11 Mar 1974-
TL;DR: In this article, the results of simultaneous tests on vibration amplitudes and phases of blades in the presence of flutter in axial compressor rotors were presented, and the results showed that the results were similar to those reported in this paper.
Abstract: : The present study describes results of simultaneous tests on vibration amplitudes and phases of blades in the presence of flutter in axial compressor rotors.
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23 Oct 1975TL;DR: In this article, a method and apparatus for measuring deflection of rotating members, such as the blades of a turbomachinery stage, is provided, where the rotating member is illuminated with a high intensity light beam such as a laser, at least one location upon the member where deflection is to be determined.
Abstract: A method and apparatus for measuring deflection of rotating members, such as the blades of a turbomachinery stage, are provided. The rotating member is illuminated with a high intensity light beam, such as a laser, at least one location upon the member where deflection is to be determined. Another location which serves as a reference is also illuminated in a similar manner. As the rotating member passes through the light beams, the light beams are reflected from reflective patches, thereby producing light impulses which are received by a light measuring device. The light pulses are converted to electrical impulses, the time increment between pulses being a function of the distance between the two locations and, thus, a measure of deflection. The dynamic component of blade-to-blade vibration is determined by comparing the time increments for a plurality of blades in the stage.
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