Programmable jet blade excitation system

Details Programmable jet blade excitation system Programmable jet blade excitation system

1987-02-24

1988-10-11

Noland, Tom

Measuring and testing

Vibration

Sensing apparatus

73671, G01H 1100

Patent

active

047762160

ABSTRACT:
System and method for characterizing the resonant responses of a plurality of rotating blades in a turbo machine. The system comprises a plurality of controllable fluid jets disposed about a blade row for exciting rotating blades with selectable frequencies of vibration. The sequential excitation of blades at a plurality of narrowly spaced frequencies and the simultaneous sensing of blade responses sufficiently resolves the resonant center frequencies and harmonics thereof in order to detect changes in characteristic blade resonances.

REFERENCES:
patent: 2682167 (1954-06-01), Gamarekian
patent: 2738671 (1956-03-01), Fiske, Jr. et al.
patent: 3289073 (1966-11-01), Loeffler

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