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Adaptive, Overset-Mesh Methodology for the Aeroacoustic Prediction of…

Award Information

Department of Defense
Award ID:
Program Year/Program:
2010 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
NAVY 10-133
Solicitation Number:
Small Business Information
706 ASHTON LN N CHAMPAIGN, IL 61820-7303
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2010
Title: Adaptive, Overset-Mesh Methodology for the Aeroacoustic Prediction of High-Speed Impinging Jets Using Large-Eddy Simulation
Agency / Branch: DOD / NAVY
Contract: N68335-10-C-0564
Award Amount: $80,000.00


Impinging supersonic jets can generate intense sound through a resonance phenomena, with tones approaching 15 dB beyond the already-loud baseline noise levels. The source of impinging jet noise, including that created by jet blast deflectors, is broadly the interaction between jet and deflecting plane, which can in certain cases close a resonant feedback loop. Accurate prediction of the noise is necessary for understanding the as-yet unknown detailed source mechanism(s), as well as enabling development of mitigation procedures. We seek to apply our validated LES prediction tool in Phase I to two well-documented cases of under-expanded jets impinging on a ground plane: one case resonates while the other does not. Our objective is to use our existing adjoint-based optimization methodology to highlight flow regions most sensitive to design changes or control strategies to reduce radiated noise. As shown in our previous, validated noise reduction efforts for turbulent jets, the adjoint provides a direct investigation into those areas of the flow, such as at the nozzle exit or ground plane, where a noise reduction strategy can be designed. GE Global Research has confirmed their strong interest in this R&D effort, and has agreed to provide critical guidance and review throughout Phase I.

Principal Investigator:

Mark Brandyberry
Chief Operating Officer

Business Contact:

William Dick
Chief Executive Officer
Small Business Information at Submission:

IllinoisRocstar LLC
60 Hazelwood Drive P. O. Box 3001 Champaign, IL 61826

EIN/Tax ID: 208533123
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No