Accession Number:

AD0780534

Title:

Small Turbine Engine Noise Reduction. Volume VI, Part II. Duct Design and Attenuation Program User's Manual.

Descriptive Note:

Final rept. 7 May 71-31 May 73,

Corporate Author:

AIRESEARCH MFG CO OF ARIZONA PHOENIX

Personal Author(s):

• Gipson,W. M.
• Goodman,B. M.

Report Date:

1973-12-01

Pagination or Media Count:

59.0

Abstract:

Vol. 6, Part 2, presents a computational package that designs attenuated duct systems for achieving predetermined attenuation increments or predicts those increments for previously determined duct and attenuator configurations. Two basic approaches have been used in this task--one entirely empirical in its development, and the other theoretically based. Author

Descriptors:

• *Turboprop engines
• *Turbofan engines
• *Noise reduction
• *Reconnaissance aircraft
• *Computer programs
• Aerial reconnaissance
• Combat surveillance
• Low altitude
• Jet engine noise
• Attenuators
• FORTRAN

Subject Categories:

• Patrol and Reconnaissance Aircraft
• Computer Programming and Software
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE