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AIR6297 - Aircraft Ground Operations Modeling – Part 1: behind start-of-takeoff roll noise directivity modeling

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Document Number: AIR6297
Project Initiation: 03-06-2014
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Sponsor Name: Eric Boeker
Title
Aircraft Ground Operations Modeling – Part 1: behind start-of-takeoff roll noise directivity modeling
Scope
To provide a method for modeling the noise directivity behind start-of-takeoff roll based on empirical data from modern jet aircraft. This method would replace the method described in Section 3.3.1 of SAE-AIR-1845A "Procedure for the Calculation of Airplane Noise in the Vicinity of Airports."
Rationale
The current behind start-of-takeoff roll noise directivity method found in SAE-AIR-1845 is based on measurements of older-generation (circa 1980), low by-pass ratio aircraft, primarily configured with fuselage-mounted engines. The new method for modeling the noise directivity behind start-of-takeoff roll is derived from empirical data from modern jet aircraft (circa 2004), most of which are configured with wing-mounted engines that tend to have higher by-pass ratios as well as operate at higher thrust levels.
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