NDLI: Open rotor noise prediction methods at nasa langley- a technology review

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Open rotor noise prediction methods at nasa langley- a technology review

Content Provider	NASA Technical Reports Server (NTRS)
Author	Tinetti, Ana F. Dunn, Mark H. Farassat, F. Nark, Douglas M.
Copyright Year	2009
Description	Open rotors are once again under consideration for propulsion of the future airliners because of their high efficiency. The noise generated by these propulsion systems must meet the stringent noise standards of today to reduce community impact. In this paper we review the open rotor noise prediction methods available at NASA Langley. We discuss three codes called ASSPIN (Advanced Subsonic-Supersonic Propeller Induced Noise), FW - Hpds (Ffowcs Williams-Hawkings with penetrable data surface) and the FSC (Fast Scattering Code). The first two codes are in the time domain and the third code is a frequency domain code. The capabilities of these codes and the input data requirements as well as the output data are presented. Plans for further improvements of these codes are discussed. In particular, a method based on equivalent sources is outlined to get rid of spurious signals in the FW - Hpds code.
File Size	912176
Page Count	20
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090020657
Archival Resource Key	ark:/13960/t8z946z9p
Language	English
Publisher Date	2009-05-11
Access Restriction	Open
Subject Keyword	Acoustics Boundary Value Problems Full Scale Tests Propulsion System Performance Ffowcs Williams-hawkings Equation Propeller Noise Rotor Aerodynamics Boundary Conditions Mathematical Models Propulsion System Configurations Noise Prediction Technology Utilization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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