Download or read book An Experimental and Theoretical Study of Cavitation in a Finite Submerged Squeeze Film Damper written by Chiao-Ping Ku and published by . This book was released on 1989 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Progress written by and published by . This book was released on 1990 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 2000 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow induced Vibrations written by and published by . This book was released on 1996 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Fluid Inertia and Cavitation on the Force Coefficients of a Squeeze Film Damper written by Si Young Jung and published by . This book was released on 1990 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Theoretical Investigation of Cavitation in Water written by J. Ackeret and published by . This book was released on 1936 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of the Characteristics of a Squeeze Film Damper by Three dimensional Navier Stokes Equations written by Changhu Xing and published by . This book was released on 2009 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The squeeze film damper is widely used in turbomachinery due to its ability to reduce vibration, help transition through the critical speed (resonance) and diminish the force transmitted to the support frame. Instead of the commonly used Reynolds equation modeling technique, this dissertation employed the three-dimensional Navier-Stokes equations. These equations are coupled with a homogeneous cavitation model, Gumbel ([pi]-film) or full Sommerfeld (2[pi]-film) cavitation strategies in dealing with the flow field and pressure development in a squeeze film damper. The characteristics of the pressure distribution, velocity field, dynamic force and the associated damping and inertia coefficients were investigated by the parametric studies using either lubricant properties such as the gas concentration, viscosity and density or damper geometry. The equation of motion for a rigid or flexible rotor model was employed in the stability analysis for the rotor-damper operating system. The dynamic coefficients were introduced into the equations to determine the rotor trajectory and stability through the source term. By analyzing the eccentricity, rotor deflection and transmissibility response, this dissertation has pointed to a methodology of finding the 'preferred range' of both one- and two-phase squeeze dampers. Further parametric studies on the rotor-damper system evaluate the effects of the lubricant dynamic viscosity, density, gaseous or vaporous cavitation, gas concentration, static eccentricity, whirling speed, rotor flexibility, retainer spring stiffness, the lumped mass distribution and the amount of imbalance. These parameters are necessary in optimizing the design of a damper. Except for the analysis based on the equations of motion, the direct numerical simulation for the determination of the journal orbit was performed by the coupling of flow, grid deformation and stress module in CFD-ACE+. The close match of the two sets of results strengthened the confidence of the simulation results. The experimental portion of this study was designed to validate qualitatively and quantitatively the numerical simulations in pressure distribution, cavitation visualization and the damper vibration. The damper vibration was measured by means of proximity sensors located circumferentially around the supporting frame; the pressure evolution was measured by pressure transducers and the gaseous and vaporous cavitation was visualized by both a digital camera with strobotac lighting and a high speed (5000fps) camera. The experimental results corroborated the theoretical analysis."--Abstract.
Download or read book Journal of Tribology written by and published by . This book was released on 2006 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1999 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Theoretical Study on Cavitation Inception and Bubbly Flow Dynamics written by Luca D'Agostino and published by . This book was released on 1987 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cavitation Effects on the Performance of Squeeze Film Damper Bearings written by Fouad Youssef Zeidan and published by . This book was released on 1989 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Theoretical Study on Cavitation Inception and Bubbly Flow Dynamics written by Luca D'Agostino and published by . This book was released on 1987 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Theoretical Study on Cavitation Inception and Bubbly Flow Dynamics Part 1 Design Development and Operation of a Cavitation Susceptibility Meter Part 2 Linearized Dynamics of Bubbly and Cavitating Flows with Bubble Dynamics Effects written by Luca D'Agostino and published by . This book was released on 1987 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This theses presents the design, development and operations of a Cavitation Susceptibility Meter based on the use of a venturi tube for the measurement of the content of active cavitation nuclei in water samples. The pressure at the venturi throat is determined from the upstream pressure and the local flow velocity without corrections for viscous effects because the flow possesses a laminar potential core in all operational conditions. The detection ov cavitation and the measurement of the flow velocity are carried out optically. The apparatus comprises a Laser Doppler Velocimeter for the measurement of the flow velocity and the detection of cavitation, a custom-made electronic Signal Processor for real time generation and temporary storage of the data and a computerized system for the final acquisition and reduction of the collected data. The results of application of the Cavitation Susceptibility Meter to the measurement of the water quality of the tap water samples are presented. The results of an investigation are presented on the linearized dynamics of two-phase bubbly flows with the inclusion of bubble dynamics effects. Two flow configurations have been studied: the time dependent one-dimensional flow of a spherical bubble cloud subject to harmonic excitation of the far field external pressure and the steady state two-dimensional flow of a bubbly mixture on a slender profile of arbitrary shape.
