Search
CSV
RISThe Multiple Contributions of Jørgen Lund’s Ph.D. Dissertation, Self-Excited, Stationary Whirl Orbits of a Journal in Sleeve Bearings, RPI, 1966, Engineering Mechanics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Lund set out to define the circumstances under which stable limit-cycle orbits could exist for the linearly unstable motion of a rigid rotor. He also examined the nature of these stable limit ...
Twice-Running-Speed Response Due to Elliptical Bearing Clearances
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Yamamoto [1] examined a vertical Jeffcott rotor model with bearing clearances and showed that a small bearing “dead-band” clearance could have a dramatic influence on synchronous rotor response. ...
Theory Versus Experiment for the Rotordynamic Impedances of Two Hole-Pattern-Stator Gas Annular Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Measured rotordynamic impedances are presented for two hole-pattern-stator seals and one smooth bore seal. These measured results are compared to predictions from a two-control-volume model and ...
A Comparison of Rotordynamic-Coefficient Predictions for Annular Honeycomb Gas Seals Using Three Different Friction-Factor Models
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A two-control-volume bulk-flow model is used to predict rotordynamic coefficients for an annular, honeycomb-stator/smooth-rotor gas seal. The bulk-flow model uses Hirs’ turbulent-lubrication model, ...
Rotordynamic-Coefficient and Leakage Characteristics for Hole-Pattern-Stator Annular Gas Seals—Measurements Versus Predictions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Selected test results are presented for an annular gas seal using a smooth rotor and a hole-pattern-roughness stator for a supply pressure of 70 bar, three pressure ratios, three speeds up ...
Measurements of Rotordynamic Coefficients of Hybrid Bearings With (a) a Plugged Orifice, and (b) a Worn Land Surface
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Test results are presented for the rotordynamic coefficients of a hybrid bearing that is representative of bearings for liquid-rocket-engine turbopump applications. The bearing is tested in the ...