Near Field Noise Analyses of Aircraft Propulsion Systems with Emphasis on Prediction Techniques for Jets

Item

Title
Near Field Noise Analyses of Aircraft Propulsion Systems with Emphasis on Prediction Techniques for Jets
Date
1967
Index Abstract
Not Available
Photo Quality
Undetermined
Report Number
AFFDL TR 67-43
Creator
Plumblee, H. E.
Ballentine, J. R.
Passinos, B.
Corporate Author
Lockheed-Georgia Company
Laboratory
Air Force Flight Dynamics Laboratory
Extent
230
Identifier
AD0822414
Access Rights
Export Controls
Distribution Classification
1
Contract
AF 33(615)-2503
DoD Project
1471
DoD Task
147102
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
AFFDL LTR
Distribution Conflict
No
Abstract
Semi-empirical methods are presented for calculating sound pressure level in a jet near noise field, including temperature and Mach number effects. A digital computer program for calculating constant SPL contours for the overall and octave band frequencies is incorporated. Machine plotted contours from model jet tests for a basic jet, VTOL jet, deflected jet, and jet with ejector are featured. Results of tip-turbine fan tests are given. Cruise fan, VTOL shrouded fan, and wing mounted configurations were tested.
Report Availability
Not available via Contrails
Date Issued
1967-08
Index In
DTIC
Type
report