RAREFIED GAS AERODYNAMIC BRIDGING PROCEDURES

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$490,710.00
Award Year:
1989
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
6782
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Remtech Inc.
3304 Westmill Dr, Huntsville, AL, 35805
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
E C Knox
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THE NEXT GENERATION OF SPACEFLIGHT VEHICLES, SUCH AS THE AFECURRENTLY BEING DESIGNED, WILL REQUIRE MORE PRECISE PREDICTIONS OF THE VEHICLE AERODYNAMICS IN THE TRANSITIONAL FLOW REGIME THAN WAS ACHIEVED WITH THE SPACE TRANSPORTATION SYSTEM. THIS IS NECESSITATED BY THE NEED TO REDUCE ONBOARD GUIDANCE AND CONTROL CONSUMABLES IN FAVOR OF INCREASED PAYLOAD. THE OBJECTIVES OF THE PHASE I STUDY IS TO REVISIT THE BRIDGING TECHNIQUES AND FORMULAS USED TO CONNECTTHE CONTINUUM WITH THE FREE-MOLECULAR FLOW REGIME IN PREDICTING THE AERODYNAMIC CHARACTERISTICS OF VEHICLES DESIGNED TO FLY IN THE RAREFIED GAS REGIME, TO IDENTIFY THE SUITABLE CORRELATION PARAMETERS AND BRIDGING TECHNIQUES, TO ANALYZE AND COMPARE THESE PARAMETERS WITH AVAILABLE EXPERIMENTAL DATA AND COMPUTER CODES, LOOKING AT POSSIBLY A MORE FLEXIBLE METHOD OF LOCAL CORRELATION, PROVIDING A MORE FLEXIBLE MEANS OF CONDUCTING CONFIGURATION SENSITIVITY STUDIES, AND FINALLY TO RECOMMEND IMPROVED PROCEDURES FOR THE APPLICATION OF THE BRIDGING TECHNIQUES. IMPLEMENTATION OF THESE IMPROVED PROCEDURES INTO AVAILABLE CODES AND DESIGNTOOLS, THEIR VERIFICATION AND DOCUMENTATION WOULD THEN BE ACCOMPLISHED IN A PROPOSED PHASE II STUDY.

* information listed above is at the time of submission.

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