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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 613 records · Page 34
All sourcesNASA NTRSDOE OSTI
NASA NTRSDate not supplied

PROBABALISTIC RISK ANALYSIS AND THERMAL MARGIN PROCESS FOR AN INFLATABLE AEROSHELL

Atmospheric entry vehicle thermal protection systems (TPS) are margined due to the uncertainties that exist in entry aeroheating environments and the thermal response of the materials and structures. Traditional approaches typically over-margin TPS and offer very little insight into the risk of over-temperature during flight. A probabilistic margin process can be used to apply thermal margin to an aeroshell based on a rigorously calculated risk of failure. This probabilistic margin process allows engineers to make informed aeroshell design, entry-trajectory modifications, and risk trades while preventing excessive margin from being applied. This methodology can also be applied to other TPS applications, hot structures, and other engineering disciplines.

Steven A Tobin↗
NASA NTRS2019

Summary of the Advanced Supersonic Parachute Inflation Research Experiment (ASPIRE) Sounding Rocket Tests with a Disk-Gap-Band Parachute

This paper will present an overview of all three ASPIRE flights. First, the Test Architecture that was used for all three ASPIRE flights will be presented. This will be broken down into an explanation of the Concept of Operations (CONOPS),the parachute test articles, the data sources used, and the process that was used to reconstruct the flight trajectories and parachute performance. Next, the performance and results for all three ASPIRE flights will be presented in the order of the phases of flight. Lastly this paper will discuss the Conclusions and Lessons Learned from those results and from the ASPIRE project as a whole.

Tynis, Jake A.↗