ROTATING MACHINERY Dynamics

Transcription

1 ROTATING MACHINERY Dynamics Proceedings of the Third International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-3) Edited by J. H. Kim Electric Power Research Institute Palo Alto, California W.-J. Yang University of Michigan Ann Arbor, Michigan OHEMISPHERE PUBLISHING CORPORATION A member of the Taylor & Francis Group Washington Philadelphia London

2 Contents Preface xi ISROMAC-3 Committees xiii ROTORS, DISCS, AND SHAFTS Rotordynamic Software S. H. Crandall 3 Flexural Vibrations of Rotors Immersed in Dense Fluids: Part I Theory F. Axisa and J. Antunes 23 Flexural Vibrations of Rotors Immersed in Dense Fluids: Part II Experiments J. Antunes, F. Axisa, and F. Hareux 39 Blade Loss Dynamics of a Magnetically Supported Rotor F. Viggiano and G. Schweitzer 53 Nonlinear Mechanism of Bistable Response of a Flexible Rotor Supported in Squeeze Film Dampers G. Meng 69 The Influence of the Rotational Speed on the Transverse Vibrations of Rotating Discs W. Seemann 79 Effects of Changing Structure Factors on Torsional Performance of Shaft Systems J. H. Yang and Q. J. Meng 95 Laboratory and Theoretical Investigations of the Vibrational Behaviour of a Uniform Rotor with a Transverse Crack B. Schmalhorst 105 Whirl of Turborotors at High Loads A. D. Dimarogonas 121 v

3 SEALS Dynamic Characteristics of Noncontacting Seal and Evaluation of Its Effect on Stability of Rotor System T. Iwatsubo 139 Flow Visualization in a Single Simulated Brush Seal M. J. Braun, R. C. Hendricks, V. A. Canacci, and M. Kazmierchak 161 Rotordynamic Coefficients for Stepped Annular Gas Seals C. C. Nelson, M. S. Dünn, and J. K. Scharrer 177 A Three Volume Bulk Flow Model for the Calculation of Rotordynamic Coefficients of Look-Through Labyrinths R. Nordmann and P. Weiser 191 Rotordynamic Coefficients for Turbulent Annular Misaligned Seals F. Simon and J. Frene 207 BEARINGS An Analytical Investigation of a Cryogenic Journal Bearing M. J. Braun and F. K. Choy 225 Determination of Bearing Dynamic Coefficients from Unbalance Response in Flexible Rotor-Bearing Systems S.-W. Hong and C.-W. Lee 239 Electromagnetic Bearings, a Reasonable Element in Turbomachinery? R. Siegwart and R. Truninger 253 An Improvement on the Estimation of the Linear Dynamic Coefficients of Oil-Film Journal Bearing Considering Nonlinear Effect by Parameter Identification in the Frequency-Domain R. H. Zhu, C. S. Chang, and X. K. Tang 269 Dynamic Characteristics of an Overhung P/A Fan in Rolling Element and Fluid Film Bearings E. J. Gunter, A. Hobbs, and C. Phelps 279 Component Test Results from the Bearing Life Improvement Program for the Space Shuttle Main Engine Oxidizer Turbopumps J. E. Keba 303 A Theoretical Calculation of the Pressure and Flow Field of Fluid Film Bearing Under Eccentric Large Whirl Orbit C.-S. Chang and H.-F. Cheng 319 vi

4 DIAGNOSTICS AND MEASUREMENTS Analysis of the Dynamic Behavior of Rotating Machines by Direct Measurement of Air Gap Variations R Talas and R O. Toom 331 Vibration Protection of Aeration Turbine Gear Motor S. Gajin, S. Kuzmanovic, and G. Varju 349 STABILITY A Simple Procedure for Assessing Rotor Stability K. E. Atkins, R. X. Perez, and D. M. Turner 361 A Method to Locate the Source of a Rotor Fluid-Induced Instability Along the Rotor D. E. Bent/y and R. F. Bosmans 377 Stability Behaviour of a Three Journal Bearing Rotor System Excited by a Lateral Force K. Kwanka 387 The Role of Flow-Related Tangential Forces in Rotor/Bearing/Seal System Stability A. Muszynska 401 Nonlinear Interactions Between Resonance and Instability in a Symmetrie Rotor S. W. Shaw and J. Shaw 419 Stability of Rotating Cylindrical Shells Including Nonlinear Stiffening P Rüge and Th. Plonski 435 EFFECTS OF FLOW-INDUCED FORCES Aeroelastic Analysis of Vertical Axis Wind Turbines A. F. A. A. El-Sayed 447 Stochastic Aerodynamic Model for Studying Darrieus Rotor in Turbulent Wind M. T. Brahimi and I. Paraschivoiu 463 Analytical and Experimental Study of the Hydrodynamic Unbalance of Single-Vane Impellers H. E. Siekmann and M. Stark 479 VII

5 Off-Design Behavior of Two Pump-Turbine Model Impellers with Similar Geometry but Different Blade Curvature H. Stepanik and H. Brekke 497 An Experimental Study of Fluid Forces on a Centrifugal Impeller Rotating and Whirling in a Volute Casing Y. Yoshida and Y. Tsujimoto 513 Periodic Radial Forces Acting on Screw Centrifugal Pump K. Tanaka, M. Arai, and S. Ikeo 527 CONTROL AND DESIGN Active Chamber System for Vibration Control of Rotating Machinery J. Althaus and H. U/brich 543 A Magnetic Bearing Control Scheme for Cancelling Submerged Rotor Vibratory Forces H. M. Chen and P. Lewis 559 Optimal Location of Forces Controlling Vibration of Flexible Rotors Z Gosiewski and T. Bil 571 An Adaptive Control Method of Flexible Rotor Vibration Z Gosiewski and D. Janecki 587 The Use of Piezoelectric Actuators for Active Vibration Suppression in Rotating Machinery A. F. Kascak, A. B. Palazzolo, R. R. Lin, and G. Montague 605 Development of Sealing Line Calculation in Twin Screw Compressor L Zhang and J. F. Hamilton 623 Computer System for Multi-Bearing Rotor Design Z A. Parszewski and K. Krynicki 639 GENERAL TOPICS Electrostatic Charge Build-up in Lubricating Channels of Turbomachinery J. Seyed-Yagoobi, R. D. Gross, anda. B. Palazzolo 653 Free Vibration Analysis of a Rotating Workpiece During Machining R. P. S. Han and J. W. Z Zu 661 Equations of Motion of a Flexible Rotor with Axially Loose Disc M. Riemer 675 viii

6 The Use of Beam-Like Model Data for Stiffness Profile Estimation by the EBS Method: Part 2 Completion and Benchmarking T. A. Vest and M. S. Darlow 693 Simulation Research on the Dynamic Characteristics of a Steam-Injected Gas Turbine K.-J. Mao andx.-w. Dai 705 Application of SVD Algorithm to Influence Coefficient Balancing Computation of Flexible Rotors J. M. Yang 719 On the Asymmetrie Vibration of Point-Supported Circular Plates S. Azimi 729 Author Index 735 Subject Index 737 IX