BASS
Burning and Suppression of Solids
Prevention · MSG flow duct
Research brief.
From the NASA challenge brief
Studies the flammability of solid materials such as fabrics and plastics, which depends on oxygen concentration and, in microgravity, on airflow.
Examine how thermal and species fields can diverge and lead to microgravity flame extinguishment by varying fuel thickness
Investigate combustion in narrow channel apparatus as microgravity flame spread surrogate
Determine extinction velocity at lower oxygen levels
Assess material flammability in ISS atmosphere
AI synthesis.
Across every indexed paper for BASS
The AI backend isn't connected, so summaries can't be generated right now.
What the experiments revealed.
12 of 47 extracted findings · verified first, then by AI confidence
-
01
The extinction velocity for PMMA thin films does not depend on fuel thickness in the thermally thin regime.
Other · NTRS 20210011385 · p. 31 · AI confidence 95% · Unverified
-
02
The de Ris coefficient F for PMMA in an oxidizing mixture of 21 percent O2 and 79 percent N2 is 4.76.
Other · NTRS 20210011385 · p. 51 · AI confidence 95% · Unverified
-
03
Gas phase response to flow changes is much faster than the solid phase, resulting in almost no delay in flame response.
Other · NTRS 20140011099 · AI confidence 95% · Unverified
-
04
Quenching extinction was observed in concurrent flow around 1 cm/s.
Suppression · NTRS 20140011099 · p. 19 · AI confidence 95% · Unverified
-
05
At moderate flow speeds (1-5 cm/s), the flame continually heats the solid fuel, increasing fuel temperature and vaporization rate over time.
Other · NTRS 20140011099 · AI confidence 95% · Unverified
-
06
Microgravity flames are especially sensitive to air flow speed in the range of 0 to 5 cm/s.
Other · NTRS 20140011099 · AI confidence 95% · Unverified
-
07
Nomex fibers swell and seal spaces between fibers when exposed to heat, inhibiting heat transfer through the fabric.
Prevention · NTRS 20140011099 · p. 24 · AI confidence 95% · Unverified
-
08
Concurrent flow flame spread rate increases linearly with increasing flow speed.
Other · NTRS 20140011099 · p. 19 · AI confidence 95% · Unverified
-
09
Thicker solids can store significant heat, making extinction with a nitrogen jet difficult at given flow rates.
Suppression · NTRS 20140011099 · AI confidence 95% · Unverified
-
10
At flow speeds less than 1 cm/s, flames become dim blue and very stable, burning for a long time due to small heat loss.
Other · NTRS 20140011099 · AI confidence 95% · Unverified
-
11
Opposed flow flame spread rate is fastest at an intermediate value of flow speed.
Other · NTRS 20140011099 · p. 19 · AI confidence 95% · Unverified
-
12
The forced stretch rate at blowoff varies linearly with oxygen concentration and as the square root of the rod radius.
Other · NTRS 20170006615 · p. 6 · AI confidence 95% · Unverified