Imbalance response of a rigid rotor supported on end sealed integral squeeze film dampers /
amplitudes of rotor synchronous response at the first
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | amplitudes of rotor synchronous response at the first and second critical speeds are proportional to the any of the tests. FEM predictions of the viscous blade loss events, shock, and maneuver actions. construction allowing easier assembly, inspection, and dampers. Experiments are conducted on dampers with end damping coefficients because the lubricant viscosity damping coefficients for the end sealed ISFDS agree decreases as the operating film temperature raises. determination of system amplification factors and the developed integral squeeze film dampers (ISFDS) offer favorably with the identified damping coefficients for open ended dampers. Conventional (cylindrical) generation or utilization of increasing amounts of high performance aeroengine systems. The recently identification of the damping coefficients of sealed imbalance displacements. No subsynchronous frequencies imbalance response tests demonstrate that end gap integral dampers genemte viscous damping coefficients ISFDS from measurements of the imbalance response of a larger than two times the test values obtained earlier limits with tolerance to sudden imbalance loads due to massive rotor supported on two (identical) integral Measurements of oil flow rates, impact tests and Modern turbomachinery design directs towards the ographics. objective of the experimental program is the or (nonlinear) jump phenomenon are ever observed in plate seals of known clearance. The amplitudes of positioning (centering), and a split segment power with the minimum engine weight. High performance reduce vibrations and to suppress instabilities in reduced overall weight and length of the damper reduction on the flow through the dampers. The sealed retrofit than with any other type of damper. The sealed ISFDS demonstrates the benefit of this novel sealed SFDS restrict substantially the lubricant seals render a substantial increase in the ISFD several advantages over conventional SFDS such as speed, for increasing levels of imbalance, allow the Squeeze film dampers (SFDS) are an effective mean to structural isolation of components and rotor vibration structure with less number of parts, accuracy of synchronous rotor response at the first critical technology of application in high performance The experiments further demonstrate that the the squeeze film. The experimental verification and theoretical validation of the damping capability of through flow and determine minimal increments in the turbomachinery requires of appropriate means to ensure turbomachinery. viscous damping coefficients and with only a small when accounting for the effect of air entrainment in |
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| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xi, 60 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references (leaves 57-59). |