NASA SBIR 2010 Solicitation


PROPOSAL NUMBER: 10-1 A2.09-8157
PROPOSAL TITLE: RotCFD: A Viscous Design Tool for Advanced Configurations

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Sukra Helitek, Inc.
3146 Greenwood Road
Ames, IA 50014 - 4504
(515) 292-9646

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Andrew M Hollingsworth
3146 Greenwood Rd.
Ames, IA 50014 - 4504
(515) 292-9646

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 2
End: 4

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
The incorporation of viscous analysis in design is vital for a complete
understanding 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.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The viscous extention and parallelization of RotCFD
will find wide usage in NASA in addtion to the other
branches of the armed services.
The proposal offers a semi-automated viscous analysis tool
that will lay the foundation for advanced designs in an
economical way.

Sukra Helitek's software are currently used for many
advanced configurations at an early stage in the design
and the addtion of viscous capability and parallelization
will increase its usefulness and marketability.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Surka Helitek's software has been extensively
used by US Helicopter manufacturers for analyzing
new and existing designs. The proposed software
enhancements will extend its usefulness and retain
a global advantage.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Analytical Methods
Software Tools (Analysis, Design)

Form Generated on 09-03-10 12:12