NASA SBIR 2007 Solicitation


PROPOSAL NUMBER: 07-1 A2.10-8873
PROPOSAL TITLE: Computational Wind Tunnel: A Design Tool for Rotorcraft

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

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Angela D Lestari
3146, Greenwood Road
Ames, IA 50014 - 4504
(515) 292-9646

Expected Technology Readiness Level (TRL) upon completion of contract: 6 to 7

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Rotorcraft engineers traditionally use the wind tunnel to evaluate and
finalize designs. Insufficient correlation between wind tunnel results and flight tests,
have been often attributed in part to uncertainty in blockage corrections.
Estimation of rotor blockage is significantly more complex than bluff body
blockage as the correction depends on operational characteristics such
as rotor RPM and thrust produced.
This proposal offers to develop a design tool, which can simulate a complete
rotorcraft inside a wind tunnel including all the facility effects.
At the heart of the innovation are:
1. An automated hybrid grid generator.
2. A robust and economical incompressible flow solver for the
grid system.
3. Momentum source based rotor model that is suitable and economical
for simulating multiple rotors including the drive fans of the wind tunnel.
Phase I will develop the proof-of-concept and will use unstructured Cartesian
grid for the model and wind tunnel. The wind tunnel will be modeled with the
diffuser, test section and nozzle.
In phase II, the tool will be extended to hybrid grid with viscous grid near
solid surfaces and will include drive fans of the tunnel.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The design tool to be developed under this initiative will find wide usage throughout
NASA where wind tunnel testing is integral to any design study.
The tool can be effectively used for rotorcrafts and
V/STOL aircrafts where quantification of
blockage effects is complex.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The computational wind tunnel to be developed will be an asset to other government agencies
including ARMY, NASA and AIR FORCE and industry where wind tunnel testing of rotorcraft
and V/STOL aircrafts is routine.
In short, the tool is a compliment to all wind tunnel testing.

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.

Simulation Modeling Environment

Form Generated on 09-18-07 17:50