Accession Number:

ADA616071

Title:

Noise of High-Performance Aircraft at Afterburner

Descriptive Note:

Quarterly progress rept. 15 Dec 2014-3 Apr 2015

Corporate Author:

FLORIDA STATE UNIV TALLAHASSEE

Personal Author(s):

• Tam, Christopher

Report Date:

2015-03-30

Pagination or Media Count:

11.0

Abstract:

The main objective of this project is to obtain a fundamental understanding of the physics of noise generation of a high performance aircraft operating at afterburner condition. The new noise components are indirect combustion noise produced by the passage of entropy waves through the nozzle of the jet. To obtain a good understanding of the noise generation processes through numerical simulation, it is imperative that a way be found to reproduce such a random wave field with prescribed statistical averaged properties computationally. Here the development of a one-dimensional computational model capable of generating a broadband entropy wave field with a prescribed intensity and frequency spectrum is reported.

Descriptors:

• *AFTERBURNERS
• *JET AIRCRAFT NOISE
• BROADBAND
• COMBUSTION
• ENTROPY
• NOISE GENERATORS
• NOZZLES
• NUMERICAL ANALYSIS
• ONE DIMENSIONAL
• PERFORMANCE(ENGINEERING)
• PHYSICS

Subject Categories:

• Acoustics
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE