Development of an Engine Air-Brake for Quiet Drag Applications

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX08CC53P
Agency Tracking Number: 075394
Amount: $99,400.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: A2.03
Solicitation Number: N/A
Small Business Information
11995 El Camino Real, San Diego, CA, 92130-2566
DUNS: 133709001
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Parthiv Shah
 Principal Investigator
 (858) 480-2101
Business Contact
 Ronan Cunningham
Title: Business Official
Phone: (858) 481-2015
Research Institution
A novel quiet engine air-brake is proposed in response to NASA's solicitation for concepts for active and passive control of noise sources for conventional and advanced aircraft. The air-brake concept is applicable to 1) next-generation, conventional tube and wing aircraft (current generation +1) and 2) advanced integrated airframe/propulsion system configurations (current generation +2), and could enable system level noise reductions of several decibels at the ground observer during approach by quietly generating drag equivalent to up to three turbofan-sized bluff bodies per powerplant. Such drag generation could enable slower, steeper approach trajectories with reduced need for drag generators such as flaps, slats and undercarriage. Proposed research tasks build upon a rigorous understanding developed by the investigating team on the aero-acoustics of drag generating, swirling exhaust flows. The objectives are to 1) create an engine air-brake design specification to constrain the design and identify and address issues and challenges associated with implementation, 2) perform trade studies on two aircraft/powerplant combinations in current generation +1 and +2 configurations to identify the attributes of suitable devices installed on such aircraft and 3) develop a candidate design for model scale aerodynamic and aeroacoustic validation in an experimental facility. The deliverable will be a written report presenting a conceptual design of a model-scale engine air-brake and proposed test plan for Phase II validation.

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

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