Author: F. H. Schmitz
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
Book Description
The theoretical and experimental status of helicopter impulsive noise is reviewed. The two major source mechanisms of helicopter impulsive noise are addressed: high-speed impulsive noise and blade-vortex interaction impulsive noise. A thorough physical explanation of both generating mechanisms is presented together with model and full-scale measurements of the phenomena. Current theoretical prediction methods are compared with experimental findings of isolated rotor tests. The noise generating mechanisms of high speed impulsive noise are fairly well understood - theory and experiment compare nicely over Mach number ranges typical of today's helicopters. For the case of blade-vortex interaction noise, understanding of noise generating mechanisms and theoretical comparison with experiment are less satisfactory. Several methods for improving theory-experiment are suggested.
Helicopter Impulsive Noise: Theoretical and Experimental Status
Author: F. H. Schmitz
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
Book Description
The theoretical and experimental status of helicopter impulsive noise is reviewed. The two major source mechanisms of helicopter impulsive noise are addressed: high-speed impulsive noise and blade-vortex interaction impulsive noise. A thorough physical explanation of both generating mechanisms is presented together with model and full-scale measurements of the phenomena. Current theoretical prediction methods are compared with experimental findings of isolated rotor tests. The noise generating mechanisms of high speed impulsive noise are fairly well understood - theory and experiment compare nicely over Mach number ranges typical of today's helicopters. For the case of blade-vortex interaction noise, understanding of noise generating mechanisms and theoretical comparison with experiment are less satisfactory. Several methods for improving theory-experiment are suggested.
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
Book Description
The theoretical and experimental status of helicopter impulsive noise is reviewed. The two major source mechanisms of helicopter impulsive noise are addressed: high-speed impulsive noise and blade-vortex interaction impulsive noise. A thorough physical explanation of both generating mechanisms is presented together with model and full-scale measurements of the phenomena. Current theoretical prediction methods are compared with experimental findings of isolated rotor tests. The noise generating mechanisms of high speed impulsive noise are fairly well understood - theory and experiment compare nicely over Mach number ranges typical of today's helicopters. For the case of blade-vortex interaction noise, understanding of noise generating mechanisms and theoretical comparison with experiment are less satisfactory. Several methods for improving theory-experiment are suggested.
Helicopter Aerodynamics Volume I
Author: Ray Prouty
Publisher: Lulu.com
ISBN: 0557089913
Category : Science
Languages : en
Pages : 594
Book Description
This is a collection of Ray Prouty's columns from Rotor and Wing magazine from 1979 to 1992.
Publisher: Lulu.com
ISBN: 0557089913
Category : Science
Languages : en
Pages : 594
Book Description
This is a collection of Ray Prouty's columns from Rotor and Wing magazine from 1979 to 1992.
Helicopter Theory
Author: Wayne Johnson
Publisher: Courier Corporation
ISBN: 0486131823
Category : Technology & Engineering
Languages : en
Pages : 1122
Book Description
Monumental engineering text covers vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise, and more. 189 illustrations. 1980 edition.
Publisher: Courier Corporation
ISBN: 0486131823
Category : Technology & Engineering
Languages : en
Pages : 1122
Book Description
Monumental engineering text covers vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise, and more. 189 illustrations. 1980 edition.
Principles of Helicopter Aerodynamics with CD Extra
Author: Gordon J. Leishman
Publisher: Cambridge University Press
ISBN: 9780521858601
Category : Science
Languages : en
Pages : 860
Book Description
Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.
Publisher: Cambridge University Press
ISBN: 9780521858601
Category : Science
Languages : en
Pages : 860
Book Description
Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.
A Community Survey of Helicopter Noise Annoyance Conducted Under Controlled Noise Exposure Conditions
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
Should Helicopter Noise be Measured Differently from Other Aircraft Noise?
Author: John A. Molino
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 96
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 96
Book Description
Alaska Helicopter Tours Sound Measurements Juneau, Alaska, June 1993
Author: Robin T. Harrison
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 16
Book Description
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 16
Book Description
Validation of Helicopter Noise Prediction Techniques
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Helicopter Noise Information for Airports and Communities
Author: Vincent Mestre
Publisher:
ISBN: 9780309389754
Category : Airplanes
Languages : en
Pages : 135
Book Description
TRB's Airport Cooperative Research Program (ACRP) Synthesis 76: Helicopter Noise Information for Airports and Communities examines the results of a literature review and survey of ten airports to summarize the impact of outreach, helicopter noise management programs, technology, and abatement procedures in managing helicopter noise. The report is geared to assist both airports and communities with addressing helicopter noise and a description of the current state of effective practices for noise management.
Publisher:
ISBN: 9780309389754
Category : Airplanes
Languages : en
Pages : 135
Book Description
TRB's Airport Cooperative Research Program (ACRP) Synthesis 76: Helicopter Noise Information for Airports and Communities examines the results of a literature review and survey of ten airports to summarize the impact of outreach, helicopter noise management programs, technology, and abatement procedures in managing helicopter noise. The report is geared to assist both airports and communities with addressing helicopter noise and a description of the current state of effective practices for noise management.
Tongass National Forest (N.F.), Helicopter Landing Tours on the Juneau Icefield 2002-2006
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 616
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 616
Book Description