DEMONSTRATING THE EFFECTIVENESS OF SURFACE TREATMENTS FOR THE REDUCTION OF TRAILING EDGE NOISE IN ROTATING BLADE SYSTEMS
Abstract
A research program is proposed to assess the effectiveness and potential of a new trailing edge noise control technology to reduce the self-noise of rotating-blade systems. The new technology, a blade surface treatment referred to as ‘finlets’, has been found to be surprisingly effective in producing broadband suppression of trailing edge noise on airfoils. Rotor flows are significantly more complex than airfoil flows, however. Demonstrating the effectiveness of finlet technology in the presence of those complications is the purpose of the work described here. The work will involve coordinated experiments (at Virginia Tech) and analytical work (at Florida Atlantic University). As part of the work a new idealized two bladed rotor will be built and tested with and without finlets in the acoustic test section of the Virginia Tech Stability Wind Tunnel. The rotor will be designed to replicate the complexities found on practical rotor systems, and the finlets will be designed to overcome those complexities. Self noise predictions will be used in the design of the rotor and to compare with rotor noise measurements made in the wind tunnel. The proposed work will last 1 year. Total cost of the proposed effort is $169,889.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512721
Entities
People
- William Davenport
Organizations
- Office of Naval Research
- United States Navy
- Virginia Tech