EFFECTS OF SUPERCOOLING AND MELT PHENOMEMA ON PARTICULATE RADIATION IN PLUMES

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 16873
Amount: $48,589.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
20 New England Business Ctr, Andover, MA, 01810
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
IN THE EVALUATION OF HEAT LOADING DUE TO RADIATION EMITTED BY PARTICLES IN A SOLID ROCKET PLUME, THE EFFECTS OF PARTICLE SUPERCOOLING ON THE SUBMELT RADIATIVE CHARACTERISTICS ARE NOT WELL UNDERSTOOD. THIS PROJECT WILL EXPERIMENTALLY CHARACTERIZE THIS SUPERCOOLING PHENOMENON BY OBSERVING PARTICLE RADIATION DURING THE RAREFACTION WAVE COOLING OF SHOCK-HEATED AL2O3 PARTICLES. THE PHASE I EFFORTWILL PROVIDE NASA WITH QUANTITATIVE DATA FOR THE EFFECTS OF SUPERCOOLING ON THE OPTICAL PROPERTIES OF AL2O3, AND WILL DEFINE POTENTIAL PHASE II EFFORTS TO QUANTIFY OTHER HIGH-TEMPERATURE RADIATIVE EFFECTS AND TO DEVELOP EXPERIMENTAL CONCEPTS FOR VERIFICATION OF PREDICTIVE CODES. THE INNOVATIVE ASPECTS OF THE WORK LIE IN THE USE OF THE RAREFACTION WAVE IN A SHOCK TUBE TO SIMULATE PLUME SUPERCOOLING EFFECTS AND IN THE APPLICATION OF STATE-OF-THE-ART OPTICAL DIAGNOSTICS TO DETERMINE REFRACTIVE INDICES OF PARTICLES AT HIGH TEMPERATURES. IN THE EVALUATION OF HEAT LOADING DUE TO RADIATION EMITTED BY PARTICLES IN A SOLID ROCKET PLUME, THE EFFECTS OF PARTICLE SUPERCOOLING ON THE SUBMELT RADIATIVE CHARACTERISTICS ARE NOT WELL UNDERSTOOD. THIS PROJECT WILL EXPERIMENTALLY CHARACTERIZE THIS SUPERCOOLING PHENOMENON BY OBSERVING PARTICLE RADIATION DURING THE RAREFACTION WAVE COOLING OF SHOCK-HEATED AL2O3 PARTICLES. THE PHASE I EFFORTWILL PROVIDE NASA WITH QUANTITATIVE DATA FOR THE EFFECTS OF SUPERCOOLING ON THE OPTICAL PROPERTIES OF AL2O3, AND WILL DEFINE POTENTIAL PHASE II EFFORTS TO QUANTIFY OTHER HIGH-TEMPERATURE RADIATIVE EFFECTS AND TO DEVELOP EXPERIMENTAL CONCEPTS FOR VERIFICATION OF PREDICTIVE CODES. THE INNOVATIVE ASPECTS OF THE WORK LIE IN THE USE OF THE RAREFACTION WAVE IN A SHOCK TUBE TO SIMULATE PLUME SUPERCOOLING EFFECTS AND IN THE APPLICATION OF STATE-OF-THE-ART OPTICAL DIAGNOSTICS TO DETERMINE REFRACTIVE INDICES OF PARTICLES AT HIGH TEMPERATURES.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government