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Reading the record, its runs and their sources.
Investigation dossier
Reading the record, its runs and their sources.
PSI recordPSI-23Investigation dossier
Advanced Combustion via Microgravity Experiments-Structure and Response of Spherical Diffusion Flames
PSI record (opens in a new tab)doi 10.60555/k57n-p030 (opens in a new tab)psi.nasa.gov/physci/repo/data/investigations/PSI-23
Evidence proximity, not a safety rating. This page describes what was tested and where each value comes from.
ACME s-Flame has no individual runs to place.
0 of 0 runs drawn.
As written in the PSI record:
A series of experiments is proposed with the following specific objectives, in both soot-free and sooty flames, to compare with detailed computational simulation to assess transport properties and detailed chemical kinetics (including chemiluminescence): Objective A. Measure and characterize the transient structure (such as temperature and species distribution) of diffusion flames established at initially non-steady, spherical flame structures for mixtures of different H2/CH4/diluent ratios (soot-free) and different C2H4/diluent ratios (sooty), for different flow rates. Objective B. Determine the quasi-steady convective/chemical-kinetic extinction limits (low system Damköhler numbers) and radiative/chemical-kinetic extinction limits (high system Damköhler numbers) for mixtures of different H2/CH4/diluent ratios (soot-free) and different C2H4/diluent ratios (sooty). Objective C. Determine the existence (for different Zeldovich number, Ze), onset (as a function Da), and nature (i.e. mode, frequency, amplitude) of pulsating instabilities theoretically predicted to occur in transient spherical diffusion flames using fuel/diluent mixtures that are above a critical Lewis number.
PSI has summary rows only for this investigation (18 rows in PSI-23_Experimental table_ACME s-Flame.csv), not individual runs, so there is nothing to fingerprint run by run. The summary rows are listed below.
Nothing from this investigation can be placed on an O₂ × pressure chart: there are no individual runs to place.
PSI has no run-level table for this investigation: its experimental table holds summary rows only (each summarises a test series, not a single run), so nothing is placed or compared. The summary rows are listed below.
18 summary rows from PSI-23_Experimental table_ACME s-Flame.csv, as they appear in PSI.
| Row | Test Type | Test Day* | Year | Month | Date | Atmosphere* | Fuel Bottle | Flames Ignited* | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 1 | First round of tests with nitrogen-diluted fuel and oxygen | 19254 | 2019 | Sept. | 11 | ~21% O2 with N2 | 50% C2H4 with N2 | 13 | *Test Day is formatted YYDDD where YY identfies year and DDD identifies day of year (GMT). |
| 2 | First round of tests with nitrogen-diluted fuel and oxygen | 19256 | 2019 | Sept. | 13 | ~21% O2 with N3 | 50% C2H4 with N3 | 16 | *Atmosphere is ~1 atm but pressure increases and O2% drops with vitiation. |
| 3 | First round of tests with nitrogen-diluted fuel and oxygen | 19304 | 2019 | Oct. | 31 | ~21% O2 with N4 | 45% CH4 with N2 | 9 | *Flames Ignited is the number ignited on that day (neglecting the day change on ISS). |
| 4 | First round of tests with nitrogen-diluted fuel and oxygen | 19308 | 2019 | Nov. | 4 | ~30% O2 with N2 | 45% CH4 with N3 | 21 | |
| 5 | First round of tests with nitrogen-diluted fuel and oxygen | 19352 | 2019 | Dec. | 18 | ~21% O2 with N2 | 100% H2 | 10 | |
| 6 | First round of tests with nitrogen-diluted fuel and oxygen | 20006 | 2020 | Jan. | 6 | ~21% O2 with N3 | 44.4% H2 with CH4 | 17 | |
| 7 | First round of tests with nitrogen-diluted fuel and oxygen | 20013 | 2020 | Jan. | 13 | ~21% O2 with N4 | 66.7% H2 with CH4 | 22 | |
| 8 | First round of tests with nitrogen-diluted fuel and oxygen | 20024 | 2020 | Jan. | 24 | ~21% O2 with N5 | 100% H2 | 16 | |
| 9 | First round of tests with nitrogen-diluted fuel and oxygen | 20029 | 2020 | Jan. | 29 | ~21% O2 with N6 | 50% C2H4 with N2 | 21 | |
| 10 | First round of tests with nitrogen-diluted fuel and oxygen | 20132 | 2020 | May | 11 | ~21% O2 with He | 25% H2, 20% CH4, with He | 7 | |
| 11 | Second round of tests with helium-diluted fuel and oxygen | 20136 | 2020 | May | 15 | ~21% O2 with He | 20% H2, 25% CH4, with He | 11 | |
| 12 | Second round of tests with helium-diluted fuel and oxygen | 20142 | 2020 | May | 21 | ~30% O2 with He | 30% H2, 15% CH4, with He | 17 | |
| 13 | Second round of tests with helium-diluted fuel and oxygen | 20155 | 2020 | June | 3 | ~30% and ~21% O2 with He | 45% H2 with He | 9 | |
| 14 | Second round of tests with helium-diluted fuel and oxygen | 20160 | 2020 | June | 8 | ~30% and ~21% O2 with He | 45% CH4 with He | 12 | |
| 15 | Second round of tests with helium-diluted fuel and oxygen | 20164 | 2020 | June | 12 | ~30% O2 with He | 20% C2H4 with He | 11 | |
| 16 | Second round of tests with helium-diluted fuel and oxygen | 20170 | 2020 | June | 18 | ~30% and ~21% O2 with He | 25% C2H4 with He | 20 | |
| 17 | Second round of tests with helium-diluted fuel and oxygen | 20176 | 2020 | June | 24 | ~30% and ~21% O2 with He | 30% C2H4 with He | 23 | |
| 18 | Second round of tests with helium-diluted fuel and oxygen | 20190 | 2020 | July | 8 | ~30% and ~21% O2 with He | 35% H2 with He | 21 |