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RISExperimental Performance of an Open Ends, Centrally Grooved, Squeeze Film Damper Operating With Large Amplitude Orbital Motions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aircraft engines customarily implement squeeze film dampers (SFDs) to dissipate mechanical energy caused by rotor vibration and to isolate the rotor from its structural frame. The paper presents experimental results for ...
Orbit Model Force Coefficients for Fluid Film Bearings: A Step Beyond Linearization
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Highperformance turbomachinery demands high shaft speeds, increased rotor flexibility, tighter clearances in the flow passages, advanced materials, and increased tolerance to imbalances. Operation at high speeds induces ...
Response of a Squeeze Film Damper Elastic Structure System to Multiple and Consecutive Impact Loads
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) are common in aircraft gas turbine engines, customized to provide a desired level of damping while also ensuring structural isolation. This paper presents measurements obtained in a test rig ...
Forced Coefficients for a Short Length, Open Ends Squeeze Film Damper With End Grooves: Experiments and Predictions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) are effective to ameliorate shaft vibration amplitudes and to suppress instabilities in rotor–bearing systems. Compact aero jet engines implement ultrashort length SFDs (L/D ≤ 0.2) to ...
Transient Response of a Short Length (L/D = 0.2) Open Ends Elastically Supported Squeeze Film Damper: Centered and Largely Off Centered Whirl Motions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Commonly employed in air breathing (gas turbine) engines, squeeze film dampers (SFDs) reduce the amplitude of rotor vibration while traversing system critical speeds or in transient events such as during a maneuver load, ...
On the Force Coefficients of a Flooded, Open Ends Short Length Squeeze Film Damper: From Theory to Practice (and Back)
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas turbine aircraft engine manufacturers push for simple squeeze film damper (SFD) designs, short in length, yet able to provide enough damping to ameliorate rotor vibrations. SFDs employ orifices to feed lubricant directly ...
Experimental Force Coefficients for Two Sealed Ends Squeeze Film Dampers (Piston Rings and O-Rings): An Assessment of Their Similarities and Differences
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) in aircraft engines effectively aid to reduce rotor motion amplitudes, in particular when traversing a critical speed, and help to alleviate rotor whirl instabilities. The current work is a ...
Effect of Oil Supply Pressure on the Force Coefficients of a Squeeze Film Damper Sealed With Piston Rings
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Squeeze film dampers (SFDs) aid to both reduce rotor dynamic displacements and to increase system stability. Dampers sealed with piston rings (PR), common in aircraft engines, are proven to boost damping generation, reduce ...