NASA SBIR 2019-II Solicitation

Proposal Summary

 19-2- Z7.04-2725
 Lander Systems Technologies
 Plume-Surface Interaction in Rarefied Environments
SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
CFD Research Corporation
701 McMillian Way Northwest, Suite D
Huntsville, AL 35806
(256) 726-4800

PRINCIPAL INVESTIGATOR (Name, E-mail, Mail Address, City/State/Zip, Phone)
Manuel Gale
701 McMillian Way Northwest, Suite D
Huntsville, AL 35806 - 2923
(256) 726-4860

BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Silvia Harvey
701 McMillian Way Northwest, Suite D
Huntsville, AL 35806 - 2923
(256) 726-4858

Estimated Technology Readiness Level (TRL) :
Begin: 4
End: 6
Technical Abstract (Limit 2000 characters, approximately 200 words)

Plume-surface interaction during propulsive landings on unprepared regolith in extra-terrestrial environments is recognized as a major risk factor facing exploration missions. Dust and debris particles are liberated and may strike the landing vehicle and surrounding assets and may obscure ground observation for safe landing. In addition, craters are formed on the landing surface, posing an additional challenge to vehicle stability and surface operations. CFDRC has developed the Gas-Granular Flow Solver (GGFS) capable of simulating the multi-phase gas-particle interaction and the complex granular physics within Moon and Mars regolith. Eulerian-Eulerian models are applied to efficiently model the gas and particle phases as continuum fluids. This capability has successfully been introduced into NASA project applications for Mars lander development including the InSight lander and future human Mars lander architectures.  With the current focus on returning to the Moon in the near future, this plume-surface effects simulation capability must be extended for applicability to lunar vacuum environments where a mixed continuum/rarefied approach must be used to properly simulate the gas-phase dynamics. In Phase I, the gas-granular capability was adapted for use in mixed continuum/rarefied regimes by coupling with a kinetic solver using a novel multi-fluid coupling approach. This combination facilitates a local switch to continuum or rarefied gas flow in a seamless automated process, distinctively accounting the gas-particle interactions. In Phase II, the multi-fluid continuum and rarefied gas and solid particles coupling algorithm will be implemented and extended for use with realistic gas and granular mixtures. A procedure will be implemented for generating realistic lunar regolith composition material models. The validation effort will include simulations with reduced gravity, varied atmospheric rarefication, supersonic flow, realistic and ideal granular mixtures.

Potential NASA Applications (Limit 1500 characters, approximately 150 words)

Potential NASA commercial applications include all NASA and commercial partner lunar lander development projects. Small commercial lander activities and NASA sponsored instrument payloads under the CLEPS program, to safely deliver payloads to the lunar surface, and eventually human lunar lander systems under the Artemis program will require accurate definition of the plume-particle distribution environment below the landers near the surface encountered by the landers and the payload instruments.

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words)

Non-NASA applications include mixing in pharmaceutical industries, where flow and heat transfer through particle beds can force local conditions to be non-continuum due to the small length scales. Other applications include ablation through porous media in low-pressure environments, such as high-altitude missile warhead re-entry applications.

Duration: 24

Form Generated on 05/04/2020 06:23:43