1. Nominal Ambient Oxygen Concentration [%], O₂
   Mole fraction of ambient oxygen in the vessel. Used for simulating the use of EGR or creating an inert (0% O₂) environment. Concentrations of other major species (N₂, CO₂, H₂O) .
2. Nominal Ambient Temperature [K], T_a
   Gas temperature of the core region of the vessel. Uniformity of core temperature.
3. Nominal Ambient Density [kg/m³], ρ_a
   Gas density of the core region of the vessel.
4. Nozzle Size or Orifice Diameter [mm], d
   Smallest diameter of injector nozzle. Detailed description of injector tips and orifice flow coefficients.
5. Nominal Injection Pressure Difference [MPa], DP_inj
   Difference between fuel injector pressure and ambient gas pressure.
6. Nominal Injector Duration [ms]
   Injection duration is actual hydraulic injection and not electronic command to injector.
7. Fuel Type
   Fuel type. Fuel properties.
8. Nominal Fuel Temperature [K], T_fl
   Nominal Fuel Temperature.
9. Institution
   Name of the institution that recorded select data.
10. File Base Name
    Experimental naming structure plus fuel type, fuel temperature, and injector duration.
11. Date
    Date experiment was performed.
12. Readme
    Readme.
13. References
    List references to data/experiment.
14. Keywords
    Keywords in categories such as Evidence of Specific Physics, Diagnostics, etc.
15. Actual Oxygen Concentration [%],
    Actual ambient oxygen mole fraction.
16. Actual Oxygen Concentration Uncertainty [%],
    Actual ambient oxygen mole fraction uncertainty.
17. Ambient Components [%],
    Actual mole fraction for all species, major and minor species.
18. Ambient Components Uncertainty [%],
    Uncertainty for all species mole fraction, major and minor species.
19. Ambient Molecular Weight [K]
    Ambient molecular weight.
20. Ambient Temperature at Ignition [K]
    Actual mean ambient core temperature at start of injection.
21. Ambient Temperature at Ignition Standard Deviation [K]
    Actual ambient core temperature Standard Deviation.
22. Ambient Temperature at Ignition Uncertainty [K]
    Actual mean ambient core temperature Uncertainty.
23. Bulk Temperature [K], T_b
    Mass-averaged bulk temperature (T_b) determined from the real-gas equation of state (P = Z &middot R &middot &#961 &middot T_b /MW), where &#961 is constant for a given experiment and P is pressure. Detailed description.
24. Actual Ambient Density [kg/m³]
    Actual ambient density.
25. Ambient Density After Ignition Standard Deviation [kg/m³],
    Actual ambient density Standard deviation.
26. Ambient Density After Ignition Uncertainty [kg/m³],
    Actual mean ambient density Uncertainty.
27. Bulk Density [kg/m3], ρ_b
    Mass-averaged bulk density. The initial density of combustion vessel charge, prior to preburn and diesel injection. Bulk density is constant for a given experimental simulation.
28. Ambient Pressure [MPa], P
    Mean ambient pressure.
29. Ambient Compressibility Factor , Z
    P=Z·R·ρ_a·T_a
30. Ambient Compressibility Factor Uncertainty
    Compressibility factor at time of injection Uncertainty.
31. Ambient Mean Velocity [m/s]
    Ambient mean velocity, could be link to spatially-resolved text file.
32. Ambient Mean Velocity Uncertainty [m/s]
    Ambient mean velocity Uncertainty.
33. Ambient Velocity Turbulence [m/s]
    Ambient velocity turbulence intensity; file.
34. Ambient Velocity Turbulence Uncertainty [m/s]
    Ambient velocity turbulence intensity Uncertainty; file.
35. Vessel Geometry
    Dimensions of vessel; could be 3d solid model, etc…
36. Actual Mean Injection Pressure [MPa]
    Actual mean injection pressure. Absolute, not pressure difference.
37. Injection Pressure Standard Deviation [MPa]
    Injection pressure Standard deviation.
38. Injection Pressure Uncertainty [MPa]
    Mean injection pressure Uncertainty.
39. Actual Mean Fuel Temperature [K]
    Actual mean fuel temperature.
40. Mean Fuel Temperature Standard Deviation [K]
    Fuel temperature Standard deviation.
41. Mean Fuel Temperature Unvertainty [K]
    Mean fuel temperature Uncertainty.
42. Mean Nozzle Temperature [K]
    Mean nozzle temperature.
43. Mean Nozzle Temperature Standard Deviation [K]
    Nozzle temperature Standard deviation.
44. Mean Nozzle Temperature Uncertainty [K]
    Nozzle temperature Uncertainty.
45. Mean Mass Rate of Injection [mg/ms]
    Mean mass rate of injection versus time.
46. Estimated Injection Duration [ms]
    Average injection duration determined by attenuation of HeNe laser positioned 7 mm in front of injector.
47. Injection Duration Standard Deviation [ms]
    Injection duration standard deviation.
48. Injection Duration Uncertainty [ms]
    Injection duration uncertainty.
49. Estimated Injection Mass [mg]
    Injected mass estimated from measured injection duration, and using injector calibration. See Equation 4 from here. Injector opening and closing effects are included by subtracting 0.15 ms from the measured injection duration for use in Eq. 4.
50. Injection Mass Standard Deviation [mg]
    Injection mass Standard deviation.
51. Injection Mass Uncertainty [mg]
    Mean injection mass Uncertainty.
52. Steady Flow Discharge Coefficient
    Discharge coefficient, steady flow.
53. Steady Flow Discharge Coefficient Uncertainty
    Discharge coefficient Uncertainty.
54. Steady Flow Are Contraction Coefficient
    Area contraction coefficient for steady flow.
55. Area Contraction Coefficient Uncertainty
    Area contraction coeff Uncertainty.
56. Actual Effective Nozzle Diameter [mm]
    Actual effective nozzle diameter.
57. Actual Nozzle Diameter Uncertainty [mm]
    Actual nozzle diameter Uncertainty.
58. Actual Upstream Nozzle and Injector Geometry
    Actual upstream nozzle and injector geometry, K factor.
59. Needle Position vs Time [mm]
    Needle position vs time.
60. Needle Position vs Time Uncertainty [mm]
    Needle position vs time Uncertainty.
61. Liquid Length [mm]
    The maximum extent of liquid-phase spray penetration during injection.
62. Fuel Properties
    Link to various fuel properties.
63. Jet Penetration [mm]
    Text file giving the penetration distance of the jet/vapor boundary versus time. Detailed description.
64. Spread Angle[degrees]
    A text file called “spreadAngle.txt” could have SA versus time, description of definition/threshold for the angle, uncertainty, etc..
65. Mixing
    2D data includes time ASI, F/A ratio, Uncertainty, Instantaneous images, whatever.
66. Pressure Rise [MPa]
    Text file giving: time relative to start of injection [ms], speed of sound corrected time relative to start of injection [ms], raw pressure rise data, smooth pressure rise data, pressure rise standard deviation, pressure rise uncertainty, absolute pressure, ROHR, and total heat release. Detailed description.
67. Velocity
    Velocity and turbulence within spray.
68. Combustion Species
    Mole or mass fraction of combustion products, radicals or intermediates. Planar images or other spatial distributions given as text files.
69. Liquid Volume
    Liquid volume fraction data, links.
70. Droplet Diameter [mm]
    Droplet diameter distribution vs time ASI.
71. High-Speed Movies
    Links to movies. Examples include chemiluminescence, soot, schlieren, shadowgraph, liquid scatter or extinction. Scale should be included. Preferred in [mm].
72. Additional Files
    Additional data and description for a given condition.