NASA SBIR 2005 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER:05 X7.04-8890
SUBTOPIC TITLE:Aeroassist Systems
PROPOSAL TITLE:Gas-Kinetic Computational Algorithm for Simulation of Aeroassist Systems

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Zona Technology Inc
9489 E. Ironwood Square Drive Suite 100
Scottsdale ,AZ 85258 - 4578
(480) 945 - 9988

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Lei   Tang
tangl@zonatech.com
9489 E. Ironwood Square Drive, Suite 100
Scottsdale, AZ  85258 -4578
(480) 945 - 9988

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
This SBIR Phase I project develops a unified computational algorithm
for simulation of hypersonic flows in both continuum and transitional
regimes based on a gas-kinetic BGK-Burnett solver. Different from the
macroscopic Burnett approach, the proposed gas-kinetic BGK-Burnett
solver is unconditionally stable for all Knudsen numbers. Whereas it
is almost impossible to correctly set up boundary condition for the
Burnett equations, this can be easily done in the proposed BGK-Burnett
solver with the Maxwell boundary condition, re-emitting the particles
from the boundary according to the accommodation coefficient. More
importantly, this BGK-Burnett solver not only allows a single algorithm
for both continuum and transitional flow regimes but also is more
suitable for integration with either DSMC or direct Boltzmann solver
in the rarefied flow regime. This is because in current hybrid CFD/DSMC
approach, the inconsistency from the fluxes estimated from CFD and DSMC
may cause an artificial flow across the interface between CFD/gas-kinetic
zones.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
NASA current mission focuses on human lunar and martian exploration.
The design of crew exploration vehicles requires the proposed
computational tool, which is able to handle the flows beyond
the continuum regime and thereby accurately predict wake heating,
single/multiple rocket plume effects on the vehicle aerodynamics
and heating.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
The proposed gas-kinetic computational algorithm can significantly
enhance the capability of aerospace industry to predict the aerothermal
loads on a space vehicle. It can also be used to analyze aerobrake
systems and to predict leakage flows past seal teeth in gas turbine
engines, etc. Such a computational tool is lacking in the market.

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.

TECHNOLOGY TAXONOMY MAPPING
Aerobrake
Fundamental Propulsion Physics
Simulation Modeling Environment


Form Printed on 09-19-05 13:12