Atlas / PMMA film · opposed flow
BASS-II test B16
2-cm 100-µm-thick PMMA, opposed flow, microgravity (ISS, Microgravity Science Glovebox). Principal investigator: Bhattacharjee. Listed date 2014-07-02
Quenched as flow was reduced
Conditions and sample
- Oxygen
- 16.5 % by volumeRecorded for this testTaken from NASA's 'Calibrated initial O2 vol%' column.
- Airflow as recorded
- 3, 5 pot, 0.4 pot (changed during the test)Recorded for this test
- Starting airflow
- 3 cm/sDerived by MicroFire AtlasFirst value of the 'Air display' column (air velocity transducer, cm/s). Later 'pot' values are fan potentiometer settings, not velocities, and are not converted.
- Pressure
- 99.2–99.5 kPaStated for the whole test series: “The total pressure is also monitored, which varied from 99.2 to 99.5 kPa in the tests reported.” BASS-II Summary Report, §2.3.5, PDF p. 46Series-level range from the Bhattacharjee report section; not a per-test reading.
- Thickness
- 0.1 mmRecorded for this test
- Width
- 20 mmRecorded for this test
- Exposed length
- Not statedNot stated in the source
- Outcome code
- Quenched as flow was reducedDerived by MicroFire AtlasCoded by MicroFire Atlas from the verbatim observations column.
What the crew and ground team wrote
“HCl 1.1 > 1.3; flame quenched after prolonged burn at 0.4 pot, one-sided flame; spread to top side and quenched immediately; did igniter wire affect top flame?”
Gas readings before and after the burn
| Initial | Final | |
|---|---|---|
| O₂, vol % | 16.5 | 16.4 |
| CO₂, vol % | 0.47 | 0.51 |
| CO, ppm | 103 | 119 |
Readings of the glovebox work volume, from NASA's table columns. They describe the enclosure, not the flame.