Engine Combustion Network – France
Open Access

Table 4

Summary of optical diagnostic techniques that could be used in ECN spray vessels [31].

Method Temperature range min/max (°C) Response/transient capability Accuracy Commercially available/relative cost General description
Rayleigh scattering 20/2500 Very fast/yes [43] 1% No/very high Non-intrusive.
Can be susceptible to background interference.
Raman scattering 20/2227 Very fast/yes [44] 7% No/very high Non-intrusive.
2% [45]
Coherent Anti-Stokes Raman Scattering (CARS) 20/2000 Fast/NA 5% Yes/very high Non-intrusive.
Laser Induced Fluorescence (LIF) 0/2700 Very fast/yes 10% No/very high Non-intrusive. Can be limited by quenching phenomena.
Laser absorption spectroscopy 20/2500 Very fast/yes [40] 15% Yes/low Non-intrusive. Line of sight averaging (limited special resolution).
5% [40]
Thermographic phosphors −250/2000 Very fast/yes 0.1–5% Yes/high Semi-intrusive.
Interferometry 0/2300 Fast/yes 1.4–5% [41, 42] No/high Non-intrusive.
Laser Induced Grating Spectroscopy (LIGS)

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