Adaptive Drainage Slots for Acoustic Noise Attenuation

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX10CE74P
Agency Tracking Number: 094397
Amount: $99,993.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2009
Solicitation Topic Code: A2.03
Solicitation Number: N/A
Small Business Information
2750 Indian Ripple Road, 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: VP, Government Programs
Phone: (937) 320-1877
Email: viningsd@crgrp.net
Research Institution
N/A
Abstract
Cornerstone Research Group, Inc. (CRG), proposes to demonstrate feasibility in the reduction of noise attributed to drainage slots in jet engine acoustic liners. This will be accomplished through the development of design rules for optimum slot design and the implementation of adaptive material technologies. CRG proposes to bring this technology to a technology readiness level (TRL) 2 after the Phase 1 effort and a TRL 4 after the Phase 2 effort. The proposed innovation lies in the recognition that drainage slots in the honeycomb of an acoustic liner may have a significantly adverse effect on its ability to absorb noise. This limits the ability of the acoustic liner to achieve its full potential. The proposed research will enable the acoustic designer to understand and to accurately model the effects of drainage slots on the acoustic impedance characteristics. It will also provide the impetus to find solutions that will counteract the adverse effects of drainage slots through adaptive means.

* Information listed above is at the time of submission. *

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