RotCFD: A Viscous Design Tool for Advanced Configurations

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CD08P
Agency Tracking Number: 105843
Amount: $99,781.00
Phase: Phase I
Program: SBIR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: A2.09
Solicitation Number: N/A
Small Business Information
IA, Ames, IA, 50014-4504
DUNS: 877929125
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Andrew Hollingsworth
 Principal Investigator
 (515) 292-9646
 nappi@sukra-helitek.com
Business Contact
 Ramanujam S Nappinnai
Title: Business Official
Phone: (515) 292-9646
Email: nappi@sukra-helitek.com
Research Institution
 Stub
Abstract
The incorporation of viscous analysis in design is vital for a completeunderstanding of aerodynamic problems.This proposal offers to develop and integrate with RotCFD a method for semi-automatically generating grids suitable for viscous analysis on complex configurations as well as parallelize the solver in RotCFD to take advantage of today's multi-core machines. The principle idea behind the semi-automation of the grid generation is to divide the geometry surface into patches and generate body-conforming grids from these patches. This partitioning allows for automatic generation of grids with aspect ratios suitable for viscous flows. Convection dominates the outer region, so unstructured Cartesian meshes can be generated quickly and easily here. The outer grid will be conformed to the inner grid so the entire grid can be treated as one unstructured grid with an unstructured solver, or as a hybrid grid with multiple zones and solvers. In the hybrid approach, viscous solvers can be used for the inner zone while the faster inviscid solvers can be used in the far-field. In Phase I a proof-of-concept grid generator, and a conceptual methodology for solver parallelization will be developed and demonstrated to work with RotCFD the rotor aerodynamic design tool. In Phase II, the features of the grid generator and solver will be fully developed and expanded.

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

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