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Development of Adaptive Vorticity Confinement Based CFD Methodology for…

Award Information

Department of Defense
Award ID:
Program Year/Program:
2014 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
IllinoisRocstar, LLC
IL Champaign, IL 61820-7059
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2014
Title: Development of Adaptive Vorticity Confinement Based CFD Methodology for Rotorcraft Applications
Agency / Branch: DOD / NAVY
Contract: N68335-14-C-0029
Award Amount: $79,996.00


The accurate representation of the rotor wake, especially the tip vortex structure, in a computationally efficient and algorithmically straight forward way is crucial for prediction of rotor aerodynamic performance, noise emission, and rotor structural dynamics. A promising approach for design and optimization is the vorticity confinement (VC) method that minimizes the numerical diffusion of vorticity in the vortical flow regions. The remaining challenge is to remove the tuning of model parameters to make the method truly predictive and robust. We will develop a fully adaptive VC (AVC) method based on a new formulation. Auxiliary numerical treatments will be implemented that can detect and mitigate potential instabilities, borrowing the idea from shock capturing schemes. We will assess the AVC method in different types of numerical schemes, particularly the spatial discretization scheme. A procedure to determine model parameters dynamically will be constructed dependent on the numerical schemes employed. As a result, it is expected that the new VC methodology will be broadly applicable and characterized for a range of numerical schemes. The Phase II AVC implementation will address rotorcraft applications, including strong transients, rotor noise due to blade vortex interaction, rotor-body nonlinear interactions, and aeroelasticity of the rotor blades.

Principal Investigator:

Bono Wasistho
CFD Group Lead
(256) 542-8123

Business Contact:

William Dick
President & CEO
(217) 417-0885
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