Author : Interagency Aircraft Noise Research Panel
Publisher :
Page : 236 pages
File Size : 13,6 MB
Release : 1975
Category : Airplanes
ISBN :
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 178 pages
File Size : 47,78 MB
Release : 2018-06-13
Category :
ISBN : 9781721094264
This Final Report has been prepared by AlliedSignal Engines and Systems, Phoenix, Arizona, documenting work performed during the period May 1997 through June 1999, under the Small Engines Technology Program, Contract No. NAS3-27483, Task Order 13, ANOPP Noise Prediction for Small Engines. The report specifically covers the work performed under Subtasks 4, 5 and 6. Subtask 4 describes the application of a semi-empirical procedure for jet noise prediction, subtask 5 describes the development of a procedure to predict the effects of wing shielding, and subtask 6 describes the results of system studies of the benefits of the new noise technology on business and regional aircraft. Lieber, Lysbeth and Golub, Robert (Technical Monitor) Langley Research Center NAS3-27483; RTOP 538-03-13-01
Author : William C. Sperry
Publisher :
Page : 52 pages
File Size : 41,51 MB
Release : 1968
Category : Airplanes
ISBN :
Author : John P. Raney
Publisher :
Page : 24 pages
File Size : 35,15 MB
Release : 1977
Category : Airplane sounds
ISBN :
Author : John P. Raney
Publisher :
Page : 44 pages
File Size : 21,19 MB
Release : 1975
Category :
ISBN :
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 186 pages
File Size : 24,70 MB
Release : 2018-07-17
Category :
ISBN : 9781722932886
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...
Author : W. E. Zorumski
Publisher :
Page : 272 pages
File Size : 18,22 MB
Release : 1986
Category : Airplanes
ISBN :
Author : Ronnie E. Gillian
Publisher :
Page : 340 pages
File Size : 11,93 MB
Release : 1982
Category : Airplanes
ISBN :
Author : Oleksandr Zaporozhets
Publisher : CRC Press
Page : 435 pages
File Size : 17,50 MB
Release : 2011-05-13
Category : Technology & Engineering
ISBN : 0415240662
Aircraft noise has adverse impacts on passengers, airport staff and people living near airports, it thus limits the capacity of regional and international airports throughout the world. Reducing perceived noise of aircraft involves reduction of noise at source, along the propagation path and at the receiver. Effective noise control demands highly skilled and knowledgeable engineers. This book is for them. It shows you how accurate and reliable information about aircraft noise levels can be gained by calculations using appropriate generation and propagation models, or by measurements with effective monitoring systems. It also explains how to allow for atmospheric conditions, natural and artificial topography as well as detailing necessary measurement techniques.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 276 pages
File Size : 25,96 MB
Release : 2018-07-23
Category :
ISBN : 9781723511417
This document describes the theoretical methods used in the rotorcraft noise prediction system (ROTONET), which is a part of the NASA Aircraft Noise Prediction Program (ANOPP). The ANOPP code consists of an executive, database manager, and prediction modules for jet engine, propeller, and rotor noise. The ROTONET subsystem contains modules for the prediction of rotor airloads and performance with momentum theory and prescribed wake aerodynamics, rotor tone noise with compact chordwise and full-surface solutions to the Ffowcs-Williams-Hawkings equations, semiempirical airfoil broadband noise, and turbulence ingestion broadband noise. Flight dynamics, atmosphere propagation, and noise metric calculations are covered in NASA TM-83199, Parts 1, 2, and 3. Weir, Donald S. and Jumper, Stephen J. and Burley, Casey L. and Golub, Robert A. Langley Research Center NASA-TM-83199-PT-4, L-16700-PT-4, NAS 1.15:83199-PT-4 RTOP 532-06-37-01...
