Report
Project 023: Analytical Approach for Qualifying Noise from Advanced Operational Procedures
Washington State University
2021
DOI:
https://doi.org/10.7273/000001742
Handle:
https://hdl.handle.net/2376/121099
Appears in Aviation Sustainability Center (ASCENT)
Abstract
Noise analysis is one important component of environmental evaluation for new flight procedure design. Communities, airports, regulators, and manufacturers must know the noise implications of new operational techniques prior to implementation. Currently, the Aviation Environmental Design Tool (AEDT) is the primary tools used to evaluate new procedures and traffic intensity levels for calculating noise impact footprints near airports. AEDT noise calculations use Noise-Power-Distance (NPD) interpolation to calculate noise using engine data generated through flight test and/or analysis. A functional relationship between engine throttle setting and atmospheric slant distance yields noise estimates for locations on the surface. The frequency spectrum is obtained from a dataset of representative aircraft families at set power levels and aircraft configurations. This procedure results in a simple and computationally tractable noise estimation capability for engine noise sources only. Aerodynamic and procedural noise contributions are not fully incorporated into the model. This project aims to improve the fidelity, accuracy, and utility of noise analysis techniques for environmental review of advanced operational procedures. Older generations of jet engines produced significantly more noise than current generation products. The assumption that jet noise dominates aerodynamic sources may have been reasonable in previous environmental impact studies. However, for new advanced approach and departure procedures, aerodynamic noise reduction may contribute strongly to environmental benefits. For example, in a delayed deceleration approach (DDA), deployment of landing gear and high-lift devices can be delayed until later stages in an approach with higher approach speeds, potentially altering total noise [1]. This effect is not captured using current noise-power-distance (NPD) noise calculations. This illustrates a gap in noise analysis capability for advanced operational procedures.
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Details
- Title
- Project 023: Analytical Approach for Qualifying Noise from Advanced Operational Procedures
- Creators
- Philip J. Morris (Author) - Pennsylvania State University
- Academic Unit
- Aviation Operations; Aviation Sustainability Center (ASCENT)
- Publisher
- Washington State University
- Grants
- 13-C-AJFE-MIT-08, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99900623185601842
- Language
- English
- Resource Type
- Report