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Compare investigations side by side

The same attributes for each, in the same order, so that what they share and where they differ is visible at a glance.

BASS-II

Mapped ignition, flame spread and extinction limits of rods, slabs, films and fabric as oxygen was lowered and airflow changed.

Saffire-II

Burned nine smaller samples - silicone, cotton-fiberglass, acrylic and Nomex - and compared each with the same material at normal gravity.

BRE

Used a gas burner to imitate burning solids, and tested it in still air at the very atmospheres NASA is considering for exploration.

FLEX

Burned single fuel droplets in atmospheres diluted with carbon dioxide or helium to map where flames can no longer survive.

NASA focus
Direct
Direct
Direct
Direct
Hardware
SPICE flow ductISS
Saffire flow ductCygnus
ACME burnersISS
Droplet apparatus (MDCA)ISS
Fuel
SolidsPMMA, SIBAL fabric (cotton/fiberglass), Nomex, Japan wax
SolidsSilicone, SIBAL fabric (cotton/fiberglass), PMMA, Nomex + PMMA
Gasesethylene, methane
Liquidsmethanol, n-heptane
Shape
rod, fabric sheet, thin film, slab
fabric sheet
flat porous burner
droplet
Oxygen
13.6% to 22.2%
21.5% to 22.1%
21% to 40%
12% to 34%
Pressure
99.2 kPa to 101 kPaassumed
102 kPa to 103 kPa
not reported in PSI
70.2 kPa to 309 kPa
Flow speed
0 to 53 cm/s
20 cm/s
not reported in PSI
not reported in PSI
What was varied
oxygen concentrationyesflow speed and directionyessample materialyessample shapeyessample thicknessyesflow directionnoigniter powernopressurenoburner sizenofuel and dilutionnosuppressant gas and amountnofuelnodroplet sizeno
oxygen concentrationnoflow speed and directionnosample materialyessample shapenosample thicknessyesflow directionyesigniter poweryespressurenoburner sizenofuel and dilutionnosuppressant gas and amountnofuelnodroplet sizeno
oxygen concentrationyesflow speed and directionnosample materialnosample shapenosample thicknessnoflow directionnoigniter powernopressureyesburner sizeyesfuel and dilutionyessuppressant gas and amountnofuelnodroplet sizeno
oxygen concentrationyesflow speed and directionnosample materialnosample shapenosample thicknessnoflow directionnoigniter powernopressureyesburner sizenofuel and dilutionnosuppressant gas and amountyesfuelyesdroplet sizeyes
Measurements
Flame imagingnoRadiometrynoThermocouplesnoSoot measurementnoHeat fluxnoGas analysisyesFlow velocityyesDroplet sizingno
Flame imagingyesRadiometryyesThermocouplesyesSoot measurementnoHeat fluxnoGas analysisyesFlow velocityyesDroplet sizingno
Flame imagingnoRadiometrynoThermocouplesnoSoot measurementnoHeat fluxyesGas analysisnoFlow velocitynoDroplet sizingno
Flame imagingnoRadiometryyesThermocouplesnoSoot measurementyesHeat fluxnoGas analysisnoFlow velocitynoDroplet sizingyes
Contributes to
PreventionDetectionSuppression
PreventionDetectionSuppression
PreventionDetectionSuppression
PreventionDetectionSuppression
Itemized rows
129
9
18
276
Publications
17
7
16
51
Raw data on PSI
275 GB
16.9 GB
2 TB
924 GB

The rows line up attributes, not results. Ranges show what each table reports, and a range is not evenly sampled. Two investigations with overlapping ranges are not thereby comparable: check hardware, fuel and what was varied first.