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

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

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