Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines and Propellers - Brossura

Brossura

ISBN 10: 1461393434 ISBN 13: 9781461393436

Casa editrice: Springer Verlag, 2011

Riassunto

The first International Symposium on Unsteady Aerodynamics and Aero­ elasticity of Turbomachines was held in Paris in 1976, and was followed by symposia at Lausanne in 1980, Cambridge in 1984, Aachen in 1987, Bei­ jing in 1989, and Notre Dame in 1991. The proceedings published following these symposia have become recognized both as basic reference texts in the subject area and as useful guides to progress in the field. It is hoped that this volume, which represents the proceedings of the Sixth International Symposium on Unsteady Aerodynamics of Turbomachines, will continue that tradition. Interest in the unsteady aerodynamics, aeroacoustics, and aeroelasticity of turbomachines has been growing rapidly since the Paris symposium. This expanded interest is reflected by a significant increase in the numbers of contributed papers and symposium participants. The timeliness of the topics has always been an essential objective of these symposia. Another important objective is to promote an international exchange between scien­ tists and engineers from universities, government agencies, and industry on the fascinating phenomena of unsteady turbomachine flows and how they affect the aeroelastic stability of the blading system and cause the radiation of unwanted noise. This exchange acts as a catalyst for the development of new analytical and numerical models along with carefully designed ex­ periments to help understand the behavior of such systems and to develop predictive tools for engineering applications.

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Contenuti:

I. Computational Methods for Unsteady Flows.- Unsteady Aerodynamic Methods.- An Innovative Algorithm for Periodic Flow Calculations Using a Parallel Architecture—Some Applications to Unsteady Aerodynamics.- A Framework for Multi-Stage Unsteady Flow Calculations.- Long Time Behavior of Unsteady Flow Computations.- Simulation of 3D-Unsteady Internal Flows.- II. Unsteady Cascade Flows.- Time Linearized Euler Calculations for Unsteady Quasi-3D Cascade Flows.- Unsteady Flow Field Predictions for Oscillating Cascades.- Compressible Flows with Vortical Disturbances Around a Cascade of Loaded Airfoils.- Development of a Steady Potential Solver for Use with Linearized Unsteady Aerodynamic Analyses.- Calculation of Unsteady Linearized Euler Flows in Cascades Using Harmonically Deforming Grids.- 2D Linearized Harmonic Euler Flow Analysis for Flutter and Forced Response.- Prediction of Unsteady 2D-Flow in Turbomachinery Bladings.- Axial-Gap Effects on the Propagation of Unsteady Flow in Cascades.- III. Unsteady Transonic and Supersonic Flows.- Unsteady Lifting Surface Theory for Supersonic Through-Flow Fan.- Time-Dependent Predictions and Analysis of Turbine Cascade Data in the Transonic Flow Region.- Supersonic Stator-Rotor Interaction in a Turbine Stage.- Oscillation of an Airfoil Behind a Detached Normal Shock.- IV. Unsteady Viscous Effects.- Experimental Determination of Nonlinear Transfer Functions Characterizing Shock Wave/Turbulent Boundary Layer Interactions.- Analysis of Blade Unsteady Boundary Layers and Wakes.- Active Control of Centrifugal Compressor Rotating Stall.- Computational Investigation of Airfoil Stall Flutter.- Compressor Blade Gust Response to Attached and Separated Flow Forcing Functions.- V. Unsteady Flow Measurements.- Experimental Methods and Results in Unsteady Aerodynamics and Aeroelasticity.- Three-Dimensional Unsteady Flow in a Single Stage Axial-Flow Turbine and Compressor.- Reduced Frequency Effects on Gust Response Unsteady Aerodynamics in Turbomachines.- The Response of a Low Solidity Symmetric Airfoil Cascade to Compressor Wake and Linear Theory Gusts.- Time-Dependent Pressure Fluctuations on an Oscillating Turbine Cascade at Transonic Off-Design Flow Conditions.- Linear Oscillating Cascade Unsteady Aerodynamic Experiments.- Experimental Investigation of the Unsteady Pressure Field on a Vibrating Blade in Steady and Unsteady Flow.- Test Facility for Flutter Investigations with Variable Frequency of the Vibrating Blade.- VI. Aeroacoustics.- Aeroacoustics in Turbomachines and Propellers—Future Research Needs.- Acoustic Control of Flow Instabilities.- High-Speed Helicopter Rotor Noise—Shock Waves as a Potent Source of Sound.- Unsteady Flowfield of a Propfan at Takeoff Conditions.- Prediction of Noise Field of a Propfan at Angle of Attack.- The Application of Experimental Data to Blade Wake Interaction Noise Prediction.- Aeroacoustics of Real Blade Cascades.- High Frequency Gust Interaction with Single Loaded Airfoils in Subsonic Flows.- Influence of Airfoil Shape and Incidence Angle on High-Frequency Gust Interaction Noise.- VII. Aeroelastic Instabilities and Control.- A Comparison of Mistuning Effects on Flutter Between Stalled and Unstalled Cascades.- Splitter Blades for Passive Turbomachine Flutter Control.- A Non-Synchronous Vibration of Moving Blades Coupled with the Bleed Chamber Resonance in an Axial Compressor.- Aeroelasticity of Fan Blades with Complex Modes.- VIII. Standard Configurations for Unsteady Flows.- Panel Discussion on “Standard Configurations for Unsteady Flow Through Vibrating Axial-Flow Turbomachine-Cascades”.

Su questa edizione

• Editore: Springer Verlag
• Data di pubblicazione: 2011
• ISBN 10: 1461393434
• ISBN 13: 9781461393436
• Rilegatura: Copertina flessibile
• Numero di pagine: 904
• Redattore: Atassi H. M.