Objective

As written in the PSI record:

The FLEX (Flame Extinguishment Experiment) investigation aims to map the flammability limits of liquid fuels in microgravity environments, measure the effectiveness of various gaseous fire suppressants such as CO2, He, and SF6, and develop reliable predictive models for combustion limits under reduced gravity conditions. The mission seeks to validate and improve simplified models by incorporating detailed chemical reactions, heat transfer, and material movement, using both space-based data and extensive ground-based tests. Key flight experiment goals include obtaining high-resolution measurements of droplet burning rates, flame extinction behavior, heat radiation, soot levels, and temperature profiles, while systematically analyzing the effects of different ambient conditions and suppressant concentrations. These investigations are essential for advancing the fundamental understanding of combustion processes in microgravity and enhancing fire safety protocols for future space missions.

Fingerprint COMPUTED

Computed from the 274 run rows below: what varied, what was held constant, and what was never recorded.

Placeable

274 of 274 record O₂ and can be placed (the engine can compute a distance); 273 also record pressure and appear on the charts.

Gravity

Microgravity (274)

Fuel classes

Liquid droplet (274)

Flow regime

quiescent (274)

Materials (2)

Methanol (157) · Heptane (117)

Outcomes

extinguished (186) · disruption (61) · completed (27)

Measured quantities

initial N₂ [mole fraction] (274) · initial He [mole fraction] (274) · initial CO₂ (column labelled 'CO') [mole fraction] (274) · burn time [s] (268) · initial droplet diameter [mm] (262) · burning rate — unit as labelled in PSI ('mm'); suspect [mm (as labelled)] (258) · visible-flame extinction diameter [mm] (197)

Per-run identifiers

FLEX Test # · FLEX Identifier · Test GMT

Data-quality flags

• assumed-value × 274: A value assumed by MARGIN (see the note), not stated in the source.
• suspect-unit × 258: The unit looks inconsistent with the values.
• out-of-range × 1: A value lies outside the physically expected range; it is kept as recorded.

Run table

Normalized values with the original cell beneath each. Inspect a row for its conversions, flags, source and distance to your scenario.

FLEX: 274 runs from PSI-69_Experimental table_FLEX.csv, showing the first 50.