Unsteady Airfoil Design Optimization with Application to Dynamic Stall

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$999,929.00
Award Year:
2012
Program:
SBIR
Phase:
Phase II
Contract:
W911W6-12-C-0027
Agency Tracking Number:
A2-4929
Solicitation Year:
2011
Solicitation Topic Code:
A11-002
Solicitation Number:
2011.1
Small Business Information
Combustion Research and Flow Technology,
6210 Kellers Church Road, Pipersville, PA, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
929950012
Principal Investigator:
Vineet Ahuja
Senior Research Scientist
(215) 766-1520
vineet@craft-tech.com
Business Contact:
Brian York
Principal Scientist&Tre
(215) 766-1520
york@craft-tech.com
Research Institution:
Stub




Abstract
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.

Agency Micro-sites

US Flag An Official Website of the United States Government