ACME: Advanced Combustion via Microgravity Experiments
Dennis P Stocker
From Nov. 2017 to Feb. 2022, the ACME project’s six independent investigations of laminar, non-premixed flames of gaseous fuels were conducted on the International Space Station (ISS) in the Combustion Integrated Rack (CIR). An exploration of flames at the extremes of high sooting and high dilution was conducted with a coaxial coflow burner, where the fuel and oxidizer velocities were typically matched. An investigation of electric-field effects also used the same coflow burner as well as a simple gas-jet burner, with a circular electrode mesh downstream of the burner, at voltages of either polarity up to 10 kV. A study focused on material flammability in a quiescent atmosphere emulated the burning of condensed-phased fuels using cylindrical burners with a flat perforated outlet instrumented to measure the heat flux to the burner, i.e., emulated fuel. Three studies of soot processes, flame dynamics, and low-temperature combustion used porous spherical burners yielding a nominally one-dimensional flame structure. The ACME research will be represented through images and text.
Test conditions.
Extracted from the paper by AI · “Verified” means a person checked it
| Fuel | O₂ | Pressure | Airflow | Sensors | Source | AI conf. | Status |
|---|---|---|---|---|---|---|---|
| gaseous fuels coaxial coflow burner |
— | — | fuel and oxidizer velocities were typically matched | — | p. 1 | 95% | Pending |
| gaseous fuels coaxial coflow burner and simple gas-jet burner |
— | — | — | circular electrode mesh | p. 1 | 95% | Pending |
| condensed-phase fuels cylindrical burners with a flat perforated outlet |
— | — | quiescent atmosphere | heat flux sensor | p. 1 | 95% | Pending |
| — porous spherical burners |
— | — | — | — | p. 1 | 95% | Pending |
Findings.
-
01
ACME project conducted six independent investigations of laminar, non-premixed flames of gaseous fuels on the ISS between Nov. 2017 and Feb. 2022.
Other · p. 1 · AI confidence 98% · Reported · Pending
“From Nov. 2017 to Feb. 2022, the ACME project’s six independent investigations of laminar, non-premixed flames of gaseous fuels were conducted on the International Space Station (ISS) in the Combustion Integrated Rack (CIR).”
-
02
Electric-field effects were investigated using voltages of either polarity up to 10 kV.
Other · p. 1 · AI confidence 98% · Reported · Pending
“at voltages of either polarity up to 10 kV”
-
03
Porous spherical burners yielded a nominally one-dimensional flame structure.
Other · p. 1 · AI confidence 95% · Reported · Pending
“porous spherical burners yielding a nominally one-dimensional flame structure”