Analysis of ECN spray A ignition in a Rapid Compression Machine using simultaneous OH* chemiluminescence and formaldehyde PLIF | Oil & Gas Science and Technology

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Table 1

Summary of the RCM settings at ECN spray A target conditions.

Compression ratio	9 (lowest, volume after compression = 131 cm³)
Temperature before compression	363 K
Gas composition	Reactive: O₂/N₂/Ar 15/40/45% mol	Reactive: O₂/N₂/Ar 15/55/30% mol
Average (bulk) density at SOI	23 ± 0.2 kg/m³	23.2 ± 0.1 kg/m³
Core density at SOI (ρ_inj)	21.3 kg/m³	21.6 ± 0.1 kg/m³
Injector #	14
Injection timing (t_inj)	74 ms after the end of compression
Pressure at t_inj	47.84 ± 0.43 bar	48.06 ± 0.1 bar
Temperature at t_inj	Target temperature: T_inj = 900 K. Adiabatic core temperature T_c = 939 ± 2 K. Time averaged temperature at chamber center at t_inj ± 50 ms: T_{core_center} = 917± 8 K. Space averaged core temperature at t_inj: T_core = 925 ± 18 K.	Target temperature: T_inj = 850 K. Adiabatic core temperature T_c = 884 K. Time averaged temperature at chamber center at t_inj ± 50 ms: T_{core_center} = 860 ± 17 K.

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