[ PSI-10 // ACME ]
ACME/Flame Design — Advanced Combustion via Microgravity Experiments / Flame Design
Hardware: Advanced Combustion via Microgravity Experiments (ACME), Combustion Integrated Rack (CIR), Reconfiguration of Combustion Integrated Rack (CIR) · Program: International Space Station (ISS) · Fuel phase: Gas · DOI 10.60555/w4zy-bt45
Objective
The primary objectives of this flight experiment are: A. Obtain soot-inception limits of quasi-steady normal and inverse spherical diffusion flames as functions of flow rate, Zst, amount of inert (N2 or CO2), and pressure for C2H4 and CH4 flames. Identify the corresponding temperatures in hot regions. Obtain similar limits and temperatures for inverse and normal coflow flames. B. Obtain detailed measurements in quasi-steady normal and inverse spherical diffusion flames for C2H4 and CH4. Determine the effects of flow rate, Zst, amount of N2, and pressure on flame temperature, size, color, and soot volume fraction. Evaluate the possible existence of steady flames. C. Obtain extinction limits as functions of Zst, amount of N2, and pressure for normal and inverse spherical C2H4 and CH4 flames. Identify the corresponding temperatures in hot regions. Identify the presence of radiative or kinetic extinction. Evaluate whether pseudo-flammability limits can be obtained for these flames.
ACME/Flame Design (PSI-10, Advanced Combustion via Microgravity Experiments (ACME), Combustion Integrated Rack (CIR), Reconfiguration of Combustion Integrated Rack (CIR), International Space Station (ISS)). 327 test runs from NASA PSI (DOI 10.60555/w4zy-bt45).
Metadata Completeness
67%
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
- Ethylene, Propane
- Gravity
- 0 g (microgravity, ISS / Cygnus flight)
- Oxygen Concentration
- 38.4% (mole fraction 0.38)
- Ambient Pressure
- 103 kPa
- Airflow Velocity
- Not reported
Findings summary
327 test runs recorded; 19.8–85.0 % O2 (n=316); 43.2–305.8 kPa (n=307); microgravity (0 g, ISS / Cygnus flight).
Source: NASA PSI PSI-10: PSI-10_Experimental table_Flame Design_Inverse Flame.csv; PSI-10_Experimental table_Flame Design_Normal 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 Flame Design Normal Flame · 207 runs · 1 held constant · 9 varied · 3 measured
Loading variables…
Experimental table Flame Design Inverse Flame · 120 runs · 1 held constant · 8 varied · 3 measured
Test Runs (327)
Conditions and measurements for each run. Open a run to see every value and its source row.
Loading the first 50 of 327 runs…