A parametric study of transonic blade-vortex interaction noise

A parametric study of transonic blade-vortex interaction noise Download PDF EPUB FB2

Get this from a library. A parametric study of transonic blade-vortex interaction noise. [A S Lyrintzis; Y Xue; United States. National Aeronautics and Space Administration.]. obtrusive harmonic noise. The effect of the propulsive force, or X-force, on Blade-Vortex Interaction (BVI) noise is well documented.

This paper presents an acoustics parametric sensitivity analysis of the effect of varying rotor aerodynamic pitch hub trim moments on BVI noise radiated by an S helicopter main rotor. Results show that. Publications Books Edited [1] Computational Aero- and Hydro-Acoustics, ASME, FED Vol.

presented at the Fluids Engineering Conference, Washington, DC, June A parametric study of vortex generators (VGs) on the transonic infinite-wing with two types of airfoil is performed using computational fluid dynamics to identify the effects of five parameters.

Reduction of blade-vortex interaction noise using higher harmonic pitch control [microform] / Thomas F. Flow structure generated by perpendicular blade vortex interaction and implications for helicopter noise A parametric study of transonic blade-vortex interaction noise [microform] / A.S.

Lyrintzis, Y. Xue ; pr. Study of Blade/Vortex interaction using Computational Fluid Dynamics and Computational Aeroacoustics R. Morvant, K. Badcock, G. Barakos, and B. Richards Computational Fluid Dynamics Lab, Department of Aerospace Engineering, University of Glasgow.

While waiting for better wake data, the two codes have been used for a theoretical parametric study of arbitrary single blade-vortex interactions. This study gives a physical insight of the. ANASTASIOS S. LYRINTZIS Associate Professor School of Aeronautics and Astronautics [Faculty Program of Study in a Second Discipline] c.

Summer visits NASA Lewis Research Center "Study of Transonic Blade-Vortex Interaction Noise," Noise Control Engineering Journal, Vol. 32, No. 3, May-Junepp. 11th Aeroacoustics Conference. 19 October - 21 October Sunnyvale,CA,U.S.A. Meeting Paper Home; A parametric study of mean loading effects on airfoil gust interaction noise.

Rotor blade-vortex interaction impulsive noise source identificationand correlation with rotor wake predictions. “A Parametric Study of Blade Vortex Interaction Noise for Two- Tree- and Four-Bladed Model Rotors at Moderate Tip Speeds: Theory and Experiment,” Paper A D, 39th Annual National Forum of the American Helicopter Society, Cited by: Active Control of Wake/Blade-Row Interaction Noise J Asymptotic Theory of Supersonic Propeller Noise J Parametric Computational Study of Isolated Blade-Vortex Interaction Noise J Active Control of Fan Noise from a Turbofan En-gine J Propeller and Rotor Systems Adaptive Finite Element Method for Turbulent Flow near a.

“A Parametric Study of Transonic Blade-Vortex Interactions,” Proceedings of NOISE- Noise Control Design: Methods and Practice, edited by J. Bolton, Noise Control Foundation, New York, Purdue University, West Lafayette, IN, June, pp.

The blade-vortex interaction (BVI) noise of a helicopter is generated by the sudden change of blade load during the interaction between a blade and previously shed tip vortices.

It prevents helicopters from being widely used as a means of inter-city transportation in densely populated : Takashi Aoyama, Shigeru Saito. A review of helicopter rotor blade tip design technology has been carried out with a view to undertaking subsequent computations to evaluate the performance of new tip designs.

The review starts by briefly looking at (fixed) wing tip design concepts and the underlying fluid mechanics on which they are based in order to see if there is any carry Cited by: Interactions between the blades and vortical structures within the wake of a helicopter rotor are a significant source of impulsive loading and noise, particularly in descending flight.

Advances in the prediction and understanding of such blade vortex interactions have been aided in recent years by the extensive experimental dataset made available through the HART test programme.

AN EXPERIMENTAL STUDY OF PARALLEL BLADE-VORTEX INTERACTION AERODYNAMICS AND ACOUSTICS UTILIZING AN INDEPENDENTLY GENERATED VORTEX C. Kitaplioglu, F. Caradonna, and M. McCluer Ames Research Center SUMMARY This report presents results from an experimental study of rotor blade-vortex interaction (BVI) aerodynamics and acoustics.

22ème CongrèsFrançaisdeMécanique Lyon,24au28Août A Numerical Experiment for the Aeroacoustic Study of Orthogonal Blade/Vortex Interaction P. Zehnera,1, F. Falissarda, X. Gloerfeltb -TheFrenchAerospaceLab,FChâtillon,FranceAuthor: Paul Zehner, Fabrice Falissard, Xavier Gloerfelt.

An adaptive integration surface, determined by pressure gradient or density perturbation, is developed for the prediction of transonic rotor noise at different tip Mach numbers and observer locations. Some conclusions are obtained as follows. (1) The FW-H_pds method appears to be a better choice in evaluating transonic rotor by: 1.

A Review of Morphing (blade vortex interaction (BVI) noise) (Leishman, ). These problems, while not necessarily imperative to performance improvements, have to be solved in but a parametric study of the compliance was not performed.

Johnson et al. The time-harmonic (blade-rate and its harmonics) and stochastic unsteady forces produced by interaction with non-uniform inflow are the dominant components of the low-frequency acoustic signature of a non-cavitating marine propulsor.

Experimental investigation of the perpendicular rotor blade-vortex interaction at transonic speeds. AIAA Journal, 30(3), Kalkhoran IM, Wilson DR. Experimental investigation of the parallel rotor blade-vortex interaction at transonic speeds. AIAA Journal, 30(8), Lu FK, Chung KM.

A computer program for rapid parametric evaluation of various types of cryogenics spacecraft systems is presented. The mathematical techniques of the program provide the capability for in-depth analysis combined with rapid problem solution for the production of.

A Parametric Study of the Aeromechanical Stability of a Bearingles Rotor Far Field Noise of Transonic Blade-Vortex Interactions Lyrintzis, A.

Cornell University Prediction of Blade-Vortex Interaction Noise Using Airloads Generated by a Finite-Difference Technique Tadghighi, Hormoz. Aircraft Propulsion, Second Edition follows the successful first edition textbook with comprehensive treatment of the subjects in airbreathing propulsion, from the basic principles to more advanced treatments in engine components and system integration.

This new edition has been extensively updated to include a number of new and important topics. The Online Books Page. Online Books by. Langley Research Center. A Wikipedia article about this author is available. Langley Research Center: A Computer Program for the Determination of the Acoustic Pressure Signature of Helicopter Rotors Due to Blade Thickness (NASA Technical Memorandum X; ), also by Gerald H.

Mall and F. Farassat (page images at HathiTrust). Juvé, D.,Experimental characterization of jet noise, in Measurement, simulation and control of subsonic and supersonic jet noise, Lecture Seriesvon Kàrmàn Institute for Fluid Dynamics, ISBN, Bailly, C., Bogey, C.

& Castelain, T.,Subsonic and supersonic jet mixing noise, in Measurement, simulation and control of subsonic and supersonic jet.

title = "Examination of vortex deformation during blade-vortex interaction", abstract = "Results of a blade-vortex interaction (BVI) study incorporating particle image velocimetry (PIV) are by: Furthermore, the noise emitted by the rotor blades is compounded by the interaction of the blades with the tip vortices of the proceeding blades (blade vortex interaction (BVI) noise) (Leishman, ).

These problems, while not necessarily imperative to performance improvements, have to be solved in order to obtain a smooth ride.

epa / first report on status and progress of noise research and control programs in the federal government june volume 2 research panel reports the u.

environmental protection agency office of noise abatement and control this document has been approved for general availability. Vortex Model and Blade Span Influence on Orthogonal Blade-Vortex Interaction Noise.

Authors: Paul Zehner, Fabrice Falissard, Xavier Gloerfelt Pages: 1 - 9 Abstract: AIAA Journal, Ahead of Print. Citation: AIAA Journal PubDate: TZ DOI: /1.J ; Beamforming Method for Extracting the Broadband Noise Sources of Counter.

The starting point in the formulation of most acoustic problems is the acoustic wave equation. Those most widely used, the classical and convected wave equations, have significant restrictions, i.e., apply only to linear, nondissipative sound waves in a steady homogeneous medium at rest or in uniform by: A Study of the effect of flight density and background noise on V/STOL acceptability / (Washington, D.C.: National Aeronautics and Space Administration ; [Springfield, Va.: For sale by the National Technical Information Service], ), by Harry Sternfeld, Langley Research Center, and Boeing Vertol Company (page images at HathiTrust).

Full text of "NASA Technical Reports Server (NTRS) Aeronautical engineering: A cumulative index to a continuing bibliography (supplement )" See other formats. A Parametric Study of an Axisymetric Busemann Biplane Configuration.

Arad, Zonal-Detached Eddy Simulation of Transonic Buffet on a Civil Aircraft Type Configuration. Brunet, Parametric Studies of Blade-Vortex Mechanism of Interaction Using Large-Eddy Simulation. George C. Ashby, Jr. and Aubrey M. Cary, Jr., A Parametric Study of the Aerodynamic Characteristics of Nose-Cylinder-Flare Bodies at a Mach Number ofNASA TN D, June Martin M.

Mikulas, Jr. and John A. McElman, On Free Vibrations of Eccentrically Stiffened Cylindrical Shells and flat Plates, NASA TN D, September Journal of Aerospace Technology and Management is a techno-scientific publication serialized, edited, and published by the Institute of Aeronautics and Space (Instituto de Aeronáutica e Espaço-IAE).

ABSTRACT Title of Dissertation: PIEZOELECTRIC HYDRAULIC HYBRID ACTUATOR FOR A POTENTIAL SMART ROTOR APPLICATION Jayant Sirohi, Doctor of. Exploiting the properties of piezoelectric materials to minimize vibration in rotor-blade actuators, this book demonstrates the potential of smart helicopter rotors to achieve the smoothness of ride associated with jet-engined, fixed-wing aircraft.

Vibration control is effected. Mechanical Engineering and Materials Science People. Methods and related apparatus embodiments are disclosed that allow novel Conformal Vortex Generator and/or Elastomeric Vortex Generator art to improve energy efficiency and control capabilities at many surface points of a body or object moving at speed in aero/hydrodynamic Newtonian fluids, by reducing; shock energy losses, surface flow turbulence, and/or momentum layer by:.

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Save for later. You may be interested in. Most frequently terms. aircraft flight performance rotor fuel altitude thrust wing climb engine helicopter drag .EPA/b January ABSTRACTS OF THE UNITED STATES AND FOREIGN OPEN LITERATURE ON NOISE Task Report J Part II by E. P. Bergmann I.

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