Multiscale Lagrangian-Eulerian Algorithm for Determining the Vorticity Confinement Term for Rotorcraft Computational Fluid Dynamics (CFD) Computations

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$79,991.00
Award Year:
2014
Program:
SBIR
Phase:
Phase I
Contract:
N68335-14-C-0028
Agency Tracking Number:
N132-092-0056
Solicitation Year:
2013
Solicitation Topic Code:
N132-092
Solicitation Number:
2013.2
Small Business Information
D & P LLC
3409 N. 42nd Pl., Phoenix, AZ, -
Hubzone Owned:
N
Minority Owned:
Y
Woman Owned:
Y
Duns:
781820258
Principal Investigator:
Lei Tang
President
(480) 518-0981
tanglei@d-p-llc.com
Business Contact:
Lei Tang
President
(480) 518-0981
tanglei@d-p-llc.com
Research Institution:
Stub




Abstract
This SBIR Phase I project proposes to develop a multi-scale computational algorithm to determine the vorticity confinement term for rotorcraft Computational Fluid Dynamics (CFD) computations. Similar to the Large Eddy Simulation approach, the proposed approach simulates the large scales in the flow field and models the unresolved small scales like the tip vortices in the computations. The large scales are simulated using the Eulerian approach while the unresolved small scales are modeled using the Lagrangian approach. The effects of the unresolved small scales are included into the governing equations as the Vorticity Confinement terms. As a result, one is able to perform a rotorcraft CFD computation on a regular CFD grid without excessive numerical diffusion of the tip vortices. A feasibility study will be performed during Phase I to demonstrate the validity of the proposed algorithm for preserving the rotor tip vortex structure. Only after the success of the Phase I feasibility study, it is meaningful to further refine and demonstrate the methodology in Phase II.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government