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Active Control of Rotor-Lock Noise in Turbofan Engines

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
56462
Program Year/Program:
2002 / SBIR
Agency Tracking Number:
012575
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Hersh Acoustical Engineering, Inc.
22305 Cairnloch Street Calabasas, CA 91302 5875
View profile »
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2002
Title: Active Control of Rotor-Lock Noise in Turbofan Engines
Agency: NASA
Contract: NAS3-02008
Award Amount: $69,896.00
 

Abstract:

The proposed innovation is the design of an active control system to reduce aircraft turbofan engine rotor-lock inlet noise generated when rotor tip speeds become transonic. The system design for this program would be tailored to the requirements of the NASA GRC 22-inch diameter Source Diagnostic Fan. The proposed Phase I research program consists of (1) a conceptual design of a prototype active control sound source and (2) a MatLab based design of an active control system. The concept is an innovation because it uses an active/passive segmented liner noise cancellation concept, developed at Hersh Acoustical Engineering, Inc. (HAE) to cancel rotor-lock noise. A successful Phase I research program will establish the feasibility of developing an active control system capable of efficiently suppressing rotor-lock noise.

Principal Investigator:

Bruce Walker
Principal Investigator
8053738533
haebew@iswest.com

Business Contact:

Alan Hersh
Vice President
8053738533
haeash@iswest.com
Small Business Information at Submission:

Hersh Acoustical Engineering, Inc.
780 Lakefield Road, Unit G Westlake Village, CA 91361

EIN/Tax ID: 953718491
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No