subject
Acoustics
Acoustics: explore 2 source-linked works published from 1985 to 2025, with original documents and citations.
This collection is a preview while coverage and quality are evaluated.
Coverage and selection
Includes records with this source-supplied label or an explicit phrase match in their metadata. Matches indicate a mention, not proof that a paper uses a method or tests a material. Source versions are consolidated by DOI.
Sources: osti, nasa. Collection updated 2026-09-15. Counts describe this index, not the complete source archives.
Aerodynamics and Acoustics of Propellers
A state of the art review of the aerodynamic design and testing of modern propellers, acoustic and vibration environmental problems and their solutions, and considerations in the integration of the propeller(s) and airframe is presented. Propellers have recently become a focus of attention after having been neglected for many years. The efficient use of propellers as a propulsion medium up to Mach 0.6 was realized at the expense of high noise and vibration. Since the mid-1970s there have been many developments, including the propfan, with an aerodynamic efficiency of 80% at Mach 0.8 now seriously challenges the fanjet. The advent of the supercritical airfoil is another significant development beginning to influence propeller design.