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Experimental And Numerical Investigation Of The Rotor Stator Interaction In Radial Turbomachines
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Book Synopsis Experimental and Numerical Investigation of the Rotor-stator Interaction in Radial Turbomachines by : Giovanna Cavazzini
Download or read book Experimental and Numerical Investigation of the Rotor-stator Interaction in Radial Turbomachines written by Giovanna Cavazzini and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rotor-Stator Interaction in Radial Turbomachines by : Giovanna Cavazzini
Download or read book Rotor-Stator Interaction in Radial Turbomachines written by Giovanna Cavazzini and published by LAP Lambert Academic Publishing. This book was released on 2013-01 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction between rotating and stationary parts affects the flow field inside both components, modifying the machine performance in terms of operating stability, structural vibrations, noise and pressure pulsations. The aim of this book is to improve the understanding of the rotor-stator interaction phenomena with an extensive in-depth investigation of their characteristics, origin, development and effects on the machine performance. An unusual acoustical approach, aimed at identifying a possible connection between noise emissions and inner fluid-dynamics, was proposed and combined with a PIV experimental analysis in order to study the unsteady flow phenomena developing inside the pump vaned diffuser. These analysis, coupled with a numerical analysis on the same turbomachine, allowed to analyze in-depth the effects of the rotor-stator interaction on the machine flow field and hence on its performance.
Book Synopsis A combined experimental and numerical investigation of the flow in a heated rotor/stator cavity, with a radial inflow, ASME 99-GT-170 by : E. LaRoche
Download or read book A combined experimental and numerical investigation of the flow in a heated rotor/stator cavity, with a radial inflow, ASME 99-GT-170 written by E. LaRoche and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine & Aeroengine Congress & Exhibition, Indianapolis, Indiana, June 7-10, 1999.
Book Synopsis An Experimental and Numerical Investigation of Stator-rotor Interactions in a Transonic Compressor by : Steven Ernest Gorrell
Download or read book An Experimental and Numerical Investigation of Stator-rotor Interactions in a Transonic Compressor written by Steven Ernest Gorrell and published by . This book was released on 2001 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: At close spacing the rotor bow shock is actually chopped by the stator trailing edge forming a pressure wave on the upper surface of the stator that propagates upstream until it weakens. In the reference frame relative to this pressure wave, the flow is supersonic and a moving shock wave exists that produces an entropy rise. The lower efficiency, pressure ratio, and mass flow rate measured at close spacing is a result of this extra loss. The magnitude of loss production is affected by the strength of the bow shock at the location it interacts with the trailing edge of the stator. Furthermore, the more blades present in the stator the more loss producing interactions take place. At far spacing the rotor bow shock has degenerated into a bow wave where it interacts with the stator trailing edge and is not chopped, therefore no pressure wave forms on the wake generator upper surface.
Book Synopsis Numerical Investigation of the Rotor-stator Interaction in a Transonic Compressor Stage by : Karl Engel
Download or read book Numerical Investigation of the Rotor-stator Interaction in a Transonic Compressor Stage written by Karl Engel and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Compressor Non-Synchronous Vibration with Full Annulus Rotor-Stator Interaction by : Daniel Espinal
Download or read book Numerical Investigation of Compressor Non-Synchronous Vibration with Full Annulus Rotor-Stator Interaction written by Daniel Espinal and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to investigate and confirm the periodicity of the Non-Synchronous Vibration (NSV) mechanism of a GE axial compressor with a full-annulus simulation. A second objective is to develop a high fidelity single-passage tool with time-accurate unsteady capabilities able to capture rotor-stator interactions and NSV excitation response. A high fidelity methodology for axial turbomachinery simulation is developed using the low diffusion shock-capturing Riemann solver with high order schemes, the Spalart-Allmaras turbulence closure model, the fully conservative unsteady sliding BC for rotor-stator interaction with extension to full-annulus and single-passage configurations, and the phase lag boundary conditions applied to rotor-stator interface and circumferential BC. A URANS solver is used and captures the NSV flow excitation frequency of 2439 Hz, which agrees reasonably well with the measured NSV frequency of 2600 Hz from strain gage test data. It is observed that the circumferentially traveling vortex formed in the vicinity of the rotor tip propagates at the speed of a non-engine order frequency and causes the NSV. The vortex travels along the suction surface of the blade and crosses the passage outlet near blade trailing edge. Such a vortex motion trajectory repeats in each blade passage and generates two low pressure regions due to the vortex core positions, one at the leading edge and one at the trailing edge, both are oscillating due to the vortex coming and leaving. These two low pressure regions create a pair of coupling forces that generates a torsion moment causing NSV. The full-annulus simulation shows that the circumferentially traveling vortex has fairly periodical behavior and is a full annulus structure. Also, frequencies below the NSV excitation frequency of 2439 Hz with large amplitudes in response to flow-separation related phenomena are present. This behavior is consistent with experimental measurements. For circumferentially averaged parameters like total pressure ratio, NSV is observed to have an effect, particularly at radial locations above 70% span. Therefore, to achieve similar or better total pressure ratio a design with a smaller loading of the upper blade span and a higher loading of the mid blade spans should be considered. A fully-conservative sliding interface boundary condition (BC) is implemented with phase-lag capabilities using the Direct Store method for single-passage simulations. Also Direct Store phase-lag was applied to the circumferential BCs to enforce longer disturbance wavelengths. The unsteady simulation using single-blade-passage with periodic BC for an inlet guide vane (IGV)-rotor configuration captures a 2291 Hz NSV excitation frequency and an IGV-rotor-stator configuration predicts a 2365 Hz NSV excitation frequency with a significantly higher amplitude above 90\% span. This correlates closely to the predicted NSV excitation frequency of 2439 Hz for the full-annulus configuration. The two-blade-row configuration exhibits the same vortex structures captured in the full-annulus study. The three-blade-row configuration only captures a tip vortex shedding at the leading edge, which can be attributed to the reflective nature of the BCs causing IGV-rotor-stator interactions to be augmented, becoming dominant and shifting NSV excitation response to engine order regime. Phase-lag simulations with a Nodal Diameter (ND) of 5 is enforced for the circumferential BCs for the three-blade-row configuration, and the results exactly matched the frequency response and flow structures of the periodic simulation, illustrating the small effect that phase-lag has on strongly periodic flow disturbances. A ND of 7 is enforced at the sliding interface, however the NSV excitation completely disappears and only the wake propagation from IGV-Rotor-Stator interactions are captured. Rotor blade passage exhibits a circumferentially travelling vortex similar to those observed in the full-annulus and two-blade-row simulations. This can occur when the rotating instability responsible for the NSV no longer maintains a pressure variation with a characteristic frequency signature as it rotates relative to the rotor rotation, and now has become the beginning of a spike-type stall cell. In this scenario the travelling vortex has become evidence of part-stall of the upper spans of the rotor blade, but stalling is contained maintaining stable operation. In conclusion, an efficient method of capturing NSV excitation has been proposed in a high-fidelity manner, where only 2% of the computational resources used in a full-annulus simulation are required for an accurate single-blade-passage multi-stage simulation.
Book Synopsis Fluid Machinery and Fluid Mechanics by : Jianzhong Xu
Download or read book Fluid Machinery and Fluid Mechanics written by Jianzhong Xu and published by Springer Science & Business Media. This book was released on 2010-07-05 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fluid Machinery and Fluid Mechanics: 4th International Symposium (4th ISFMFE)" is the proceedings of 4th International Symposium on Fluid Machinery and Fluid Engineering, held in Beijing November 24-27, 2008. It contains 69 highly informative technical papers presented at the Mei Lecture session and the technical sessions of the symposium. The Chinese Society of Engineering Thermophysics (CSET) organized the First, the Second and the Third International Symposium on Fluid Machinery and Fluid Engineering (1996, 2000 and 2004). The purpose of the 4th Symposium is to provide a common forum for exchange of scientific and technical information worldwide on fluid machinery and fluid engineering for scientists and engineers. The main subject of this symposium is "Fluid Machinery for Energy Conservation". The "Mei Lecture" reports on the most recent developments of fluid machinery in commemoration of the late professor Mei Zuyan. The book is intended for researchers and engineers in fluid machinery and fluid engineering. Jianzhong Xu is a professor at the Chinese Society of Engineering Thermophysics, Chinese Academy of Sciences, Beijing.
Book Synopsis Proceedings of the 7th International Conference on Industrial Engineering (ICIE 2021) by : Andrey A. Radionov
Download or read book Proceedings of the 7th International Conference on Industrial Engineering (ICIE 2021) written by Andrey A. Radionov and published by Springer Nature. This book was released on 2022-01-01 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent findings in industrial, manufacturing and mechanical engineering, and provides an overview of the state of the art in these fields, mainly in Russia and Eastern Europe. A broad range of topics and issues in modern engineering is discussed, including the dynamics of machines and working processes, friction, wear and lubrication in machines, surface transport and technological machines, manufacturing engineering of industrial facilities, materials engineering, metallurgy, control systems and their industrial applications, industrial mechatronics, automation and robotics. The book gathers selected papers presented at the 7th International Conference on Industrial Engineering (ICIE), held in Sochi, Russia, in May 2021. The authors are experts in various fields of engineering, and all papers have been carefully reviewed. Given its scope, the book will be of interest to a wide readership, including mechanical and production engineers, lecturers in engineering disciplines, and engineering graduates.
Book Synopsis NUMERICAL INVESTIGATION OF ROTOR WAKE-STATOR INTERACTION. by :
Download or read book NUMERICAL INVESTIGATION OF ROTOR WAKE-STATOR INTERACTION. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Iv In this thesis, numerical solutions of a 2D stator compressor cascade at a given inlet Mach number (0.7) and four values of incidence (49°, 51°, 53° and 55°) are obtained. Reynolds averaged, thin layer, compressible Navier Stokes equations are solved. Different grid types have been generated. Finite differencing approach and LU - ADI splitting technique are used. Three block parallel Euler and Navier Stokes solutions are compared with the experimental results. Baldwin-Lomax turbulence model is used in the turbulent predictions and boundary layer comparisons and numerical results are in good agreement with the experiment. On the last part of the study, a rotor wake in the inlet flow has been introduced in the steady and unsteady analyses. The influence of this wake and the wake location in the inlet flow, to the total force and pressure is presented. The results have been showed that there is a relationship between the wake position and the incidence value of the case.
Book Synopsis Numerical and Experimental Investigation on the Flow in Rotor-stator Cavities by : Bo Hu
Download or read book Numerical and Experimental Investigation on the Flow in Rotor-stator Cavities written by Bo Hu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental and Numerical Investigation of the Flow Field in the Turbine Stator of a Variable Geometry Turbocharger by : J. W. O'Neill
Download or read book An Experimental and Numerical Investigation of the Flow Field in the Turbine Stator of a Variable Geometry Turbocharger written by J. W. O'Neill and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Study of Unsteady Viscous Flow Due to Rotor Stator Interaction in Turbines by : A. Chernobrovkin
Download or read book Experimental and Numerical Study of Unsteady Viscous Flow Due to Rotor Stator Interaction in Turbines written by A. Chernobrovkin and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Rotor-stator Interaction in Diffuser Pumps by : Norbert Karl Erhard Arndt
Download or read book Experimental Investigation of Rotor-stator Interaction in Diffuser Pumps written by Norbert Karl Erhard Arndt and published by . This book was released on 1988 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Stator Exit Flow Field of an Automotive Torque Converter by : B. V. Marathe
Download or read book Experimental and Numerical Investigation of Stator Exit Flow Field of an Automotive Torque Converter written by B. V. Marathe and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine and Aeroengine Congress and Exposition, The Hague, Netherlands, June 13-16, 1994.
Book Synopsis Theoretical, Numerical and Experimental Investigation of the Flow in Rotor-stator Cavities with Application to a Centrifugal Pump by : Björn-Christian Will
Download or read book Theoretical, Numerical and Experimental Investigation of the Flow in Rotor-stator Cavities with Application to a Centrifugal Pump written by Björn-Christian Will and published by . This book was released on 2011 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Particle Image Velocimetry by : Giovanna Cavazzini
Download or read book The Particle Image Velocimetry written by Giovanna Cavazzini and published by BoD – Books on Demand. This book was released on 2012-05-23 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Particle Image Velocimetry is undoubtedly one of the most important technique in Fluid-dynamics since it allows to obtain a direct and instantaneous visualization of the flow field in a non-intrusive way. This innovative technique spreads in a wide number of research fields, from aerodynamics to medicine, from biology to turbulence researches, from aerodynamics to combustion processes. The book is aimed at presenting the PIV technique and its wide range of possible applications so as to provide a reference for researchers who intended to exploit this innovative technique in their research fields. Several aspects and possible problems in the analysis of large- and micro-scale turbulent phenomena, two-phase flows and polymer melts, combustion processes and turbo-machinery flow fields, internal waves and river/ocean flows were considered.
Book Synopsis Proceedings of the ASME Turbo Expo 2002 Presented at the 2002 ASME Turbo Expo, June 3-6, 2002, Amsterdam, the Netherlands by :
Download or read book Proceedings of the ASME Turbo Expo 2002 Presented at the 2002 ASME Turbo Expo, June 3-6, 2002, Amsterdam, the Netherlands written by and published by . This book was released on 2002 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation This is Volume 1 of five volumes that comprise the proceedings of the June 2002 conference, sponsored by the International Gas Turbine Institute (IGTI), a technical institute of the American Society of Mechanical Engineers. The purpose of the conference was to facilitate international exchange and development of educational and technical information related to the design, application, manufacture, operation, maintenance, and environmental impact of all types of gas engines. With an emphasis upon the need for more efficient, cleaner, and more reliable gas turbines, the approximately 130 articles cover various technical aspects of aircraft engines; coal, biomass, and alternative fuels; combustion and fuels; education; electric power; and vehicular and small turbomachines. There is no subject index. Annotation c. Book News, Inc., Portland, OR (booknews.com).
