[ PSI-21 // ACME ]
ACME CLD Flame — Advanced Combustion via Microgravity Experiments / Coflow Laminar Diffusion Flame
Hardware: Combustion Integrated Rack (CIR), ACME · Program: International Space Station (ISS) · Fuel phase: Gas · DOI 10.60555/23e1-9950
Objective
In order to provide the experimental data needed to allow rigorous testing of computational models at the extremes of the fuel dilution spectrum, we have the following objectives: A) Characterize the behavior of weak coflow diffusion flames of methane and ethylene, as a function of velocity and fuel dilution, through measurement of flame shape, lift-off heights, temperatures and extinction limits. B) Characterize the sooting tendencies of diffusion flames with long residence times, as a function of velocity and fuel dilution, through measurement of flame shape, gas temperatures in the soot-free portion of the flame, soot luminosity, soot temperatures, and soot volume fractions.
ACME CLD Flame (PSI-21, Combustion Integrated Rack (CIR), ACME, International Space Station (ISS)). 32 test runs from NASA PSI (DOI 10.60555/23e1-9950).
Metadata Completeness
0%
Share of key conditions (oxygen, pressure, airflow) reported in the source tables.
Representative Conditions
Median of the values reported across this investigation's test runs.
- Fuel / Material
- Methane (CH4), Ethylene (C2H4)
- Gravity
- 0 g (microgravity, ISS / Cygnus flight)
- Oxygen Concentration
- Not reported
- Ambient Pressure
- Not reported
- Airflow Velocity
- Not reported
The PSI record mentions both flight and ground work; 0 g reflects its ISS / Cygnus flight metadata.
Findings summary
32 test runs recorded; microgravity (0 g, ISS / Cygnus flight).
Source: NASA PSI PSI-21: PSI-21_Experimental table_CLD Flame.csv (psi.nasa.gov). File, sheet and row are listed per test run below.
Experiment Design: Held Constant vs Varied
What stayed fixed across test runs, what was changed, and what was measured, from the NASA test tables.
Experimental table CLD Flame · 32 runs · 0 held constant · 4 varied · 1 measured
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Instrument and imaging settings (1)
- Notes
Test Runs (32)
Conditions and measurements for each run. Open a run to see every value and its source row.
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