Unsteady Airfoil Design Optimization with Application to Dynamic Stall

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911W6-12-C-0027
Agency Tracking Number: A2-4929
Amount: $999,929.00
Phase: Phase II
Program: SBIR
Awards Year: 2012
Solicitation Year: 2011
Solicitation Topic Code: A11-002
Solicitation Number: 2011.1
Small Business Information
6210 Kellers Church Road, Pipersville, PA, -
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Vineet Ahuja
 Senior Research Scientist
 (215) 766-1520
Business Contact
 Brian York
Title: Principal Scientist&Tre
Phone: (215) 766-1520
Email: york@craft-tech.com
Research Institution
One of the most persistent problems affecting the aerodynamic performance of rotorcrafts is retreating blade stall that results in large pitching moments and hazardous control situations. In this proposal our primary goal is the development of an unsteady design optimization framework that can be applied to refine rotorcraft blade designs by delaying the onset and severity of stall, and improve aerodynamic performance as well as lift cycle hysteresis. The proposed unsteady optimization framework utilizes an evolutionary algorithm, automated shape parameterization/deformation tool and a novel CFD derived analysis methodology for evaluating the objective function. The framework was deployed successfully for design optimization of pitching airfoils without stall in Phase I. In Phase II the framework will be applied to Multi-objective Optimization (MDO) studies and design studies of airfoils that undergo dynamic stall. Furthermore, the framework will be extended to include a probabilistic analysis method that quantifies the uncertainty associated with designs and includes experimentally derived data in the optimization loop. A GUI will also be developed to render designs, monitor the process in real time.

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

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