Fan with active rotor stage vibration control

An apparatus for controlling vibrations in a rotor stage rotating through core gas flow is provided. The apparatus includes a source of high-pressure gas and a plurality of ports (50) for dispensing high-pressure gas. The rotor stage (34) rotates through core gas flow (23) having a plurality of circ...

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Bibliographic Details
Main Authors MATHENY, A. PAUL, BAGHDADI, SAMY, BENEDICT, BARRY K, EL-AINI, YEHIA M
Format Patent
LanguageEnglish
French
German
Published 11.10.2006
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
NON-POSITIVE DISPLACEMENT PUMPS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
STEAM ENGINES
WEAPONS
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Summary:An apparatus for controlling vibrations in a rotor stage rotating through core gas flow is provided. The apparatus includes a source of high-pressure gas and a plurality of ports (50) for dispensing high-pressure gas. The rotor stage (34) rotates through core gas flow (23) having a plurality of circumferentially distributed first (70) and second (72) regions. Core gas flow within each first and second region travels at a first and a second velocity, respectively. The first velocity is substantially higher than the second velocity. The ports dispensing the high-pressure gas are selectively positioned upstream of the rotor blades, and aligned with the second regions such that high-pressure gas exiting the ports enters the second regions. The velocity of core gas flow in the second regions consequently increases, and substantially decreases the difference in core gas flow velocity between the first and second regions.
Bibliography:Application Number: EP20030013346