Adaptive Drainage Slots for Acoustic Noise Attenuation

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CB65C
Agency Tracking Number: 094397
Amount: $599,983.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: A2.03
Solicitation Number: N/A
Small Business Information
Cornerstone Research Group, Inc.
OH, Dayton, OH, 45440-3638
DUNS: 130020209
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jason Hermiller
 Principal Investigator
 (937) 320-1877
 hermillerjm@crgrp.com
Business Contact
 Stephen Vining
Title: Business Official
Phone: (937) 937-1877
Email: viningsd@crgrp.net
Research Institution
 Stub
Abstract
Cornerstone Research Group, Inc. (CRG) demonstrated feasibility in the reduction of noise attributed to drainage slots in jet engine acoustic liners. This was accomplished through the development of design rules for optimum slot design and concept development of the implementation of adaptive material technologies to control slot dimensions. CRG brought thistechnology to a technology readiness level (TRL) 2 after the Phase 1 effort and will bring a TRL 4 after the Phase 2 effort. The Phase 1 effort provided simulated data for the acoustic designer to start to understand and develop preliminary models on the effects of drainage slots to the liner's acoustic impedance characteristics. This data has provided justification to pursue adaptive solutions that will counteract the adverse effects of drainage slots through adaptive means. In Phase 2, CRG will refine the design, scale up fabrication, demonstrate a full-scale operationally relevant aircraft part, and analyze manufacturing costs as part of a comprehensive Technology Insertion Plan.

* information listed above is at the time of submission.

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