Rotordynamic evaluation of an advanced multisqueeze film damper - Imbalance response and blade-loss simulation
- Mechanical Technology Inc., Latham, NY (United States)
In this paper results of rotordynamic response and transient tests of a novel, high load squeeze film damper design are presented. The spiral foil multisqueeze film damper has been previously shown to provide two to fourfold or larger increases in damping levels without resorting to significantly decreased damper clearances or increased lengths. By operating with a total clearance of approximately twice conventional designs, the nonlinearities associated with high-eccentricity operation are avoided. Rotordynamic tests with a dual squeeze film configuration were completed. As a part of the overall testing program, a flexible rotor system was subjected to high steady-state imbalance levels and transient simulated blade-loss events for up to 0.254 nm (0.01 in.) mass c.g. offset or 180 g-cm (2.5 oz-in.) imbalance. The spiral foil multisqueeze film damper demonstrated that the steady-state imbalance and simulated blade-loss transient response of a flexible rotor operating above its first bending critical speed could be readily controlled. Rotor system imbalance sensitivity and logarithmic decrement are presented showing the characteristics of the system with the damper installed. The ability to accommodate high steady-state and transient imbalance conditions make this damper well suited to a wide range of rotating machinery, including aircraft gas turbine engines.
- OSTI ID:
- 6414391
- Journal Information:
- Journal of Engineering for Gas Turbines and Power; (United States), Vol. 115:2; ISSN 0742-4795
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GAS TURBINE ENGINES
MECHANICAL TESTS
MECHANICAL VIBRATIONS
DAMPING
FILMS
LUBRICATING OILS
MATHEMATICAL MODELS
MOMENT OF INERTIA
TURBINE BLADES
VISCOUS FLOW
ENGINES
FLUID FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
MATERIALS TESTING
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
TESTING
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