Published 1994 by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in EnglishRead online
An experimental facility was developed to investigate the rotordynamic phenomena of rotating machinery during subcritical, resonant and supercritical operation. The behavior of the rotor was characterized throughout the operating range. The facility consists of a Bentley Nevada Corporation Rotor Kit integrated with a computerized data acquisition and control process. A LabVIEW Virtual Instrument was designed to collect, analyze and display rotor position and rotor displacement information. Experiments conducted included construction of Cascade plots, analytic prediction of the first lateral mode and demonstration of synchronous whirl due to a mass imbalance; during which, backward whirl was experienced.
|Statement||Frank A. Simei, Jr|
|The Physical Object|
|Pagination||60 p. ;|
|Number of Pages||60|
Download Development of an experimental facility for analysis of rotordynamic phenomena
Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection Development of an experimental facility for analysis of rotordynamic phenomena. Development of an Experimental Facility for Analysis of Rotordynamic Phenomena by Frank A. ;imei, Jr. Lieutenant, Uniied States Navy B.S., United States Naval Academy, Submitted in partial fulfillment of requirements for the degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING from the NAVAL POSTGRADUATE SCHOOL March II.
Thesis advisor(s): Knox T. Millsaps Jr. This banner text can have : Full text of "Development of an experimental facility for analysis of rotordynamic phenomena" See other formats DUDLEY KNOX LIBRARY NAVAL POSTGRADUATE SCHOOL MONTEREY CA Approved for public release; distribution is unlimited Development of an Experimental Facility for Analysis of Rotordvnamic Phenomena by Frank A.
Simei, Jr. Lieutenant, United States Navy B.S. Development of an experimental facility for analysis of rotordynamic phenomena. By Frank A.
Simei. Download PDF (4 MB) Abstract. Approved for public release; distribution experimental facility was developed to investigate the rotordynamic phenomena of rotating machinery during subcritical, resonant and supercritical operation Author: Frank A.
Simei. An experimental facility was developed to investigate the rotordynamic phenomena of rotating machinery during subcritical, resonant and supercritical operation. The behavior of the rotor was characterized throughout the operating range.
The facility consists of a Bentley Nevada Corporation Rotor Kit integrated with a computerized data acquisition and control process. Rotordynamic Analysis, Rotordynamic Transfer Functions, and Rotordynamic Coefficients. 2 Vibration of Rotating Systems • Vibration Signature can be Quite Complex in Nature • Vibration Modeling is Frequently used to Aid Design & Development –Includes Facility/Engine Effects.
The main results of an experimental campaign conducted in the Cavitating Pump Rotordynamic Test Facility at Alta S.p.A. are presented.
The experiments have been carried out on two different axial. BRIAN T. MURPHY, PhD, PE, is a senior research scientist with the Center for Electromechanics at The University of Texas at Austin.
He is also president of RMA, Inc., which develops and markets the Xlrotor suite of rotordynamic analysis software used worldwide by industry and academia. Imparts the theory and analysis regarding the dynamics of rotating machinery in order to design such rotating devices as turbines, jet engines, pumps and power-transmission shafts.
Takes into account the forces acting upon machine structures, bearings and related components. Provides numerical techniques for analyzing and understanding rotor systems with examples of actual designs.
The whirl excitation generates finite-speed propagation and resonance phenomena in the two-phase flow within the inducer. These, in turn, lead to a complex dependence of the lateral rotordynamic fluid forces on the excitation frequency, the void fraction, the average size of the cavitation bubbles, and the turbopump operating conditions.
The second part focuses on the theoretical modeling, experimental analysis, and practical control of cavitation-induced fluid-dynamic and rotordynamic instabilities of hydraulic turbomachinery, with special emphasis on cavitating turbopumps (cavitation surge, rotating cavitation, higher order cavitation surge, rotordynamic whirl forces).
NASA Lewis Research Center, Cleveland, Ohio, San Andres, L., and Childs, D.,“Process Liquid Turbulent Flow Hydrostatic Bearings: Analysis and Tests for Rotordynamic Coefficients,” Proceedings of the 4th International IFToMM Rotordynamics Development of Experimental Active Magnetic Bearing Device for Measurement of.
Air-induced force generated in seals is one key factor on the stability of the rotor system. In this paper, a novel negative dislocated seal (NDS) was developed in respect of dislocated bearing theory, to reduce hydrodynamic pressure effect and air-induced force and improve rotor stability as well.
A test rig was built to test rotordynamic characteristics and rotor stability of the NDS. The content of the present book is in two major parts as title of the book also suggests, the first is the modeling and analysis of rotor phenomena, and the second is the condition monitoring of. The experimental determination of stiffness and damping coefficients at two different test rigs is described including undertaken modernization of the experimental environment.
Test results on leakage and rotordynamic coefficients are shown for the three-teeth-on-stator staggered labyrinth seal with the tooth radial clearance of mm. Rotordynamics, also known as rotor dynamics, is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures.
It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk its most basic level, rotor dynamics is concerned with one or more mechanical structures.
is a platform for academics to share research papers. Shunt injection serves an important role in the labyrinth seal static and rotordynamic characteristics which are important in the prediction of turbomachinery stability.
This paper analyzed how the shunt injection affects the seal rotordynamic characteristics, and presented an improved impedance method based on unbalanced synchronous excitation to identify the rotordynamic coefficients of.
Introduction. Two important issues of the automotive turbochargers in the rotordynamics are resonance and instability of the rotor. Both have a common harmful effect that causes damages of the turbochargers during the operation.
Leader has written several papers on the subjects of experimental rotordynamics, bearing design, design audits for rotating equipment, and practical implementation of rotordynamic programs.
Footer. Laboratory George Bush Dr. West College Station, TX Symposium Office Spence Street College Station, TX However, there are still many challenges associated with this application including tool availability, resist capability, process development, and associated metrology needs.
This paper will briefly discuss these challenges and show the results of sub nm pitch (1 Tdots ∕ in. 2) patterning from both a simulation and experimental perspective. Rotordynamic Analysis of Theoretical Models and Experimental Systems Cameron Naugle This thesis is intended to provide fundamental information for the construction and analysis of rotordynamic theoretical models, and their comparison the experimental systems.
Finite Element Method (FEM) is used to construct models using Timo. Abstract. After a brief review of the fundamental aspects of cavitation relevant to the operation of high-performance inducers and turbopumps, the article summarizes their application to the analysis of pumping systems, illustrates the scaling of cavitation phenomena from model tests to full-scale operation, describes the occurrence of flow-induced instabilities in turbomachinery, and.
With its twenty-year heritage in cavitation and with the realization of the Cavitating Pump Rotordynamic Test Facility (CPRTF), SITAEL has gained a leading position and unique experimental capabilities for the characterization of unsteady flow phenomena and rotordynamic forces in rocket propellant turbopumps under fluid dynamic and thermal cavitation similarity.
This iteration adds some 50 tables and figures, reflecting new devices and phenomena since the edition, particularly in the design of rotating machinery. Four chapters cover vibration considerations in design; analytic prediction of rotordynamic response; and balancing of flexible. Psychology is the science of mind and logy includes the study of conscious and unconscious phenomena, as well as feeling and is an academic discipline of immense scope.
Psychologists seek an understanding of the emergent properties of brains, and all the variety of phenomena linked to those emergent properties, joining this way the broader neuro-scientific group of.
The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently, the modern analysis methods for real life rotor systems. This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring.
Brusa and Zolfini analyzed the dynamic behavior of the Galileo Galilei Ground (GGG) test facility through numerical analysis with FEM based Dynrot program and experimental analysis. Creci et al.  performed a full rotor dynamic analysis for a 5-KN thrust gas turbine taking into account bearing dynamics.
2 CMODELING AND EIGENVALUE ANALYSIS OF A FLEXIBLE ROTOR SYSTEM. 3 CONFIGURATION OF THE TEST RIG. 4 ROTORDYNAMIC ANALYSIS. 5 EXPERIMENTAL VERIFICATION.
6 CONCLUSION. Chapter Nonlinear vibration analysis of a rotating shaft supported by a repulsive magnetic bearing and vibration suppression using the axial control.
ABSTRACT. The focus of this literature survey and review is model reduction methods and their application to rotor dynamic systems. Rotor dynamic systems require careful consideration in their dynamic models as they include unsymmetric stiffness, localized nonproportional damping, and frequency-dependent gyroscopic effects.
The literature reviewed originates from both controls and mechanical systems. * The development of a simple model of co-axial multirotors * New industrial applications and API specifications This book will be of great interest and value to students andengineers concerned with predictions in rotordynamics andmechanical s: 1.
♥ Book Title: Machinery Vibration and Rotordynamics ♣ Name Author: John M. Vance ∞ Launching: Info ISBN Link: ⊗ Detail ISBN code: ⊕ Number Pages: Total sheet ♮ News id: 0zOIJIutYKQC Download File Start Reading ☯ Full Synopsis: "An in-depth analysis of machine vibration in rotating machinery Whether it's a compressor on an offshore.
Rotordynamic Analysis Benefits MSI uses Rotordynamic Analysis and FEA to evaluate and understand the behaviors pertinent to a rotational machine problem. MSI uses field test data used to calibrate Rotordynamic and FEA models and analyses to real world conditions to validate predictions.
Developing and Analyzing a System Rotordynamics Model. Example Rotor Analysis. Appendices. Index. (source: Nielsen Book Data) Summary Designed to introduce engineers to the theory and analysis of the dynamics of rotating machinery, this volume covers the design of such machinery as turbines, jet engines, pumps and power transmission shafts.
Rotordynamic Rub Facility. The unique test rig is used to study the high-speed, multi-plane (annular and/or point) rubbing phenomena in rotating machinery and its effect on the rotor dynamic behavior.
The test rig include the following: 30in long 3/4" diameter shaft. Aerospace Technology & Transportation Aerospace mechanics, aircraft aerodynamics (subsonic, supersonic and hypersonic) inlet aerodynamics for supersonic air-breathing aircraft, stability and transition of boundary layers and free shear layers, icing research, micro-electro-mechanical sensors applied to boundary layer control, fluid dynamics of.
Rotordynamic Analysis – Stability – Unbalance Response – Bearing Selection – Critical Speed. DOWNLOAD OUR BROCHURE: ROTOR ANALYSIS. AP Dynamics Inc – 6 Ave SW, Calgary, Alberta, T2P 0T9 Canada Phone: +1 Fax: +1 AP Dynamics LLC-1 Riverway, Suite Introduction Equations of motion Structural analysis Case studies References History and scientists History and scientists 7 / 27 • –ankine R – On the centrifugal force on rotating shafts steam turbines notion of critical speed • –öppl F, – Belluzo, Stodola notion of supercritical speed • –effcott J – The lateral vibration of loaded shafts in the neighborhod.
A two-pole synchronous motor was recently rewound for the von Karman Gas Dynamics facility at Arnold Engineering Development Complex, Arnold Air Force Base, Tennessee.
After installing the A lateral rotordynamic analysis was performed to determine the impact of this switch, prior to Comparative Analysis of Model and Experimental. judged to merit further development as a handbook that can be directly used by technical analysts.
4. This handbook contains (1) a systematic compilation of airborne release and respirable fraction experimental data for nonreactor nuclear facilities, (2) assessments of the data, and.Experimental psychology refers to work done by those who apply experimental methods to psychological study and the processes that underlie it.
Experimental psychologists employ human participants and animal subjects to study a great many topics, including (among others) sensation & perception, memory, cognition, learning, motivation, emotion; developmental processes, social .This thesis is intended to provide fundamental information for the construction and analysis of rotordynamic theoretical models, and their comparison the experimental systems.
Finite Element Method (FEM) is used to construct models using Timoshenko beam elements with viscous and hysteretic internal damping.
Eigenvalues and eigenvectors of state space equations are used to perform stability.