NASA Technical Reports Server (NTRS) 20160007658: Landing Gear Noise Prediction And Analysis For Tube-and-Wing And Hybrid-Wing-Body Aircraft - Info and Reading Options
By NASA Technical Reports Server (NTRS)
"NASA Technical Reports Server (NTRS) 20160007658: Landing Gear Noise Prediction And Analysis For Tube-and-Wing And Hybrid-Wing-Body Aircraft" and the language of the book is English.
“NASA Technical Reports Server (NTRS) 20160007658: Landing Gear Noise Prediction And Analysis For Tube-and-Wing And Hybrid-Wing-Body Aircraft” Metadata:
- Title: ➤ NASA Technical Reports Server (NTRS) 20160007658: Landing Gear Noise Prediction And Analysis For Tube-and-Wing And Hybrid-Wing-Body Aircraft
- Author: ➤ NASA Technical Reports Server (NTRS)
- Language: English
Edition Identifiers:
- Internet Archive ID: NASA_NTRS_Archive_20160007658
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"NASA Technical Reports Server (NTRS) 20160007658: Landing Gear Noise Prediction And Analysis For Tube-and-Wing And Hybrid-Wing-Body Aircraft" Description:
The Internet Archive:
Improvements and extensions to landing gear noise prediction methods are developed. New features include installation effects such as reflection from the aircraft, gear truck angle effect, local flow calculation at the landing gear locations, gear size effect, and directivity for various gear designs. These new features have not only significantly improved the accuracy and robustness of the prediction tools, but also have enabled applications to unconventional aircraft designs and installations. Systematic validations of the improved prediction capability are then presented, including parametric validations in functional trends as well as validations in absolute amplitudes, covering a wide variety of landing gear designs, sizes, and testing conditions. The new method is then applied to selected concept aircraft configurations in the portfolio of the NASA Environmentally Responsible Aviation Project envisioned for the timeframe of 2025. The landing gear noise levels are on the order of 2 to 4 dB higher than previously reported predictions due to increased fidelity in accounting for installation effects and gear design details. With the new method, it is now possible to reveal and assess the unique noise characteristics of landing gear systems for each type of aircraft. To address the inevitable uncertainties in predictions of landing gear noise models for future aircraft, an uncertainty analysis is given, using the method of Monte Carlo simulation. The standard deviation of the uncertainty in predicting the absolute level of landing gear noise is quantified and determined to be 1.4 EPNL dB.
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- Added Date: 2021-01-12 17:03:41
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