NASA STTR 2006 Solicitation


PROPOSAL NUMBER: 06-2 T6.02-9950
RESEARCH SUBTOPIC TITLE: Predictive Numerical Simulation of Rocket Exhaust Interactions with Lunar Soil
PROPOSAL TITLE: Numerical Simulation of Rocket Exhaust Interaction with Lunar Soil

NAME: CFD Research Corporation NAME: University of Florida
STREET: 215 Wynn Drive, 5th Floor STREET: P.O. Box 116550 (339 Weil Hall)
CITY: Huntsville CITY: Gainesville
STATE/ZIP: AL  35805 - 1944 STATE/ZIP: FL  32611 - 6550
PHONE: (256) 726-4858 PHONE: (352) 392-9448

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Peter Liever
215 Wynn Dr.
Huntsville, AL 35805 - 1944
(256) 726-4858

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

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Rocket plume impingement can cause significant damage and contaminate co-landing spacecraft and surrounding habitat structures during lunar landing operations. CFDRC and the University of Florida will develop an innovative simulation system for predicting surface erosion and debris transport caused by lunar surface rocket plume impingement. This simulation system combines 1) a unified continuum-rarefied flow solver capable of simulating plume impingement flow in lunar vacuum, 2) granular solid-fluid interaction simulation models for developing databases for lunar soil erosion and debris particle release mechanism, and 3) particle tracking tools to simulate debris kinetics and dispersion after liberation. During Phase I, the Unified Flow Solver (UFS) capabilities in simulating hybrid rarefied-continuum plume flow, and the debris dispersion tracking capabilities were demonstrated. The fluid-solid simulation tools realistically simulated jet induced soil grain response characteristics, clearing the path towards establishing working models of erosion and particle release mechanisms. In Phase II, the individual modules will be refined, validated and integrated into a coherent simulation system. The solid-fluid interaction physics will be refined for the peculiar lunar soil layer characteristics and consequently soil erosion models will be derived. The erosion models will serve to prescribe debris initial conditions for a debris-tracking module developed and integrated with the flow solver. The simulation capability will be essential for predicting the severity and range of dust and debris transport and for designing lunar settlement layout, dust and debris impact mitigation measures.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The debris simulation tool will be of first order importance to the Space Exploration program for lunar robotic and human mission architecture definition. The tool will be equally applicable to follow-on Mars robotic and human missions. The developed technology will also be applicable for analysis of solid propulsion systems with embedded solid particle.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Many potential non-NASA commercial applications exist in civil and military industries. Dust, sand and snow stir-up during helicopter landing and take-off in a desert or artic environment result in severe visibility impairment (brown-out), windshield abrasion and danger of debris ingestion. Civil engineering and environmental engineering applications include wind-borne landscape erosion and dust transport to populated areas.

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.

Fundamental Propulsion Physics
Simulation Modeling Environment
Software Tools for Distributed Analysis and Simulation
Testing Requirements and Architectures

Form Generated on 01-28-08 15:27