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RECORD NUMBER: 40 OF 62

OLS Field Name OLS Field Data
Main Title Near Field Noise Prediction for a Linear Array of Turbojet Engines.
Other Authors
Author Title of a Work
Smith, D. L.
Paxson, R. P.
Talmadge, R. D.
Plzak, G. A.
Publisher Defense Technical Information Center
Year Published 1974
Report Number AFFDL-TM-74-139-FYA; AD-A001 329
OCLC Number 905973299
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EKBD  AD-A001 329 Microfiche collection Research Triangle Park Library/RTP, NC 04/06/2015
Collation 77 pages.
Notes "AFFDL-TM-74-139-FYA." "AD-A001 329." "Filmed 1-13-75 NTIS." Microfiche.
Contents Notes A computer program is presented for calculating the sound pressure level (SPL) in the jet near field which accounts for ground reflection and multiple engine operation. The prediction method is a modification of the semi-empirical technique presented in AFFDL TR-67-43 'Near Field Noise Analysis of Aircraft Propulsion Systems with emphasis on Prediction Techniques for Jets'. The modifications in addition to accounting for ground reflection allow the prediction of the SPL for the overall and three octave bands at any point in the field and require data inputs of jet exit temperature, Mach number and diameter. A brief description is presented of a noise measurement program conducted on the XB-70 aircraft during which one-third octave band noise spectra were obtained for a range of engine conditions and for various combinations of linear arrays of engines.
Place Published Ft. Belvoir
Corporate Au Added Ent AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO.; United States. National Technical Information Service.
PUB Date Free Form JUL 1974
BIB Level m
Medium microform
Content text
Carrier microfiche
Cataloging Source RDA
OCLC Time Stamp 20150401113651
Language eng
Origin OCLC
Type CAT
OCLC Rec Leader 02225nam 2200433Ki 45020