› › Aircraft Noise Prediction Program Anopp Fan Noise Prediction For Small Engines

Aircraft Noise Prediction Program (Anopp) Fan Noise Prediction for Small Engines

Author : National Aeronautics and Space Administration (NASA)

Publisher : Createspace Independent Publishing Platform

Page : 186 pages

File Size : 27,6 MB

Release : 2018-07-17

Category :

ISBN : 9781722932886

Get eBook

Book Description

The Fan Noise Module of ANOPP is used to predict the broadband noise and pure tones for axial flow compressors or fans. The module, based on the method developed by M. F. Heidmann, uses empirical functions to predict fan noise spectra as a function of frequency and polar directivity. Previous studies have determined the need to modify the module to better correlate measurements of fan noise from engines in the 3000- to 6000-pound thrust class. Additional measurements made by AlliedSignal have confirmed the need to revise the ANOPP fan noise method for smaller engines. This report describes the revisions to the fan noise method which have been verified with measured data from three separate AlliedSignal fan engines. Comparisons of the revised prediction show a significant improvement in overall and spectral noise predictions. Hough, Joe W. and Weir, Donald S. Langley Research Center NOISE PREDICTION (AIRCRAFT); JET ENGINES; NOISE SPECTRA; NOISE REDUCTION; AERODYNAMIC NOISE; DATA ACQUISITION; TURBOFANS...







Advanced Aircraft Flight Performance

Author : Antonio Filippone

Publisher : Cambridge University Press

Page : 665 pages

File Size : 31,25 MB

Release : 2012-12-17

Category : Technology & Engineering

ISBN : 113978966X

Get eBook

Book Description

This book discusses aircraft flight performance, focusing on commercial aircraft but also considering examples of high-performance military aircraft. The framework is a multidisciplinary engineering analysis, fully supported by flight simulation, with software validation at several levels. The book covers topics such as geometrical configurations, configuration aerodynamics and determination of aerodynamic derivatives, weight engineering, propulsion systems (gas turbine engines and propellers), aircraft trim, flight envelopes, mission analysis, trajectory optimisation, aircraft noise, noise trajectories and analysis of environmental performance. A unique feature of this book is the discussion and analysis of the environmental performance of the aircraft, focusing on topics such as aircraft noise and carbon dioxide emissions.







New Transportation Research Progress

Author : Filip Gustavsson

Publisher : Nova Publishers

Page : 254 pages

File Size : 50,12 MB

Release : 2008

Category : Business & Economics

ISBN : 9781604560329

Get eBook

Book Description

This book deals with new research in the fields of passenger and freight transportation modes: policy analysis, formulation and evaluation; planning; interaction with the political, socioeconomic and physical environment; design, management and evaluation of transportation systems.



Handbook of Noise and Vibration Control

Author : Malcolm J. Crocker

Publisher : John Wiley & Sons

Page : 1594 pages

File Size : 17,49 MB

Release : 2007-10-05

Category : Technology & Engineering

ISBN : 0471395994

Get eBook

Book Description

Two of the most acclaimed reference works in the area of acoustics in recent years have been our Encyclopedia of Acoustics, 4 Volume set and the Handbook of Acoustics spin-off. These works, edited by Malcolm Crocker, positioned Wiley as a major player in the acoustics reference market. With our recently published revision of Beranek & Ver's Noise and Vibration Control Engineering, Wiley is a highly respected name in the acoustics business. Crocker's new handbook covers an area of great importance to engineers and designers. Noise and vibration control is one largest areas of application of the acoustics topics covered in the successful encyclopedia and handbook. It is also an area that has been under-published in recent years. Crocker has positioned this reference to cover the gamut of topics while focusing more on the applications to industrial needs. In this way the book will become the best single source of need-to-know information for the professional markets.