TY - GEN
T1 - Gas dynamics of spark-ignited pre-chamber assisted engine: PIV study
AU - Sharma, Priybrat
AU - Sampath, Ramgopal
AU - Tang, Qinglong
AU - Echeverri Marquez, Manuel Alejandro
AU - Cenker, Emre
AU - Magnotti, Gaetano
N1 - KAUST Repository Item: Exported on 2022-09-19
Acknowledgements: The authors would like to express our gratitude to Prof. Bengt Johansson and Dr. Moez Ben Houidi for their valuable insights. The paper is based upon work supported by Saudi Aramco Research and Development Center FUELCOM3 program under Master Research Agreement Number 6600024505/01. FUELCOM (Fuel Combustion for Advanced Engines) is collaborative research undertaking between Saudi Aramco and King Abdullah University of Science and Technology (KAUST) to address the fundamental aspects of hydrocarbon fuel combustion in engines and develop fuel/engine design tools suitable for advanced combustion modes.
PY - 2022/8/30
Y1 - 2022/8/30
N2 - In recent years lean-burn technologies have acquired center stage in engine research due to stringent emission norms. Among such technologies, pre-chamber assisted combustion (PCC) has gained much attention for its ability to allow ultra-lean engine operation (λ > 2). The spark-ignited pre-chambers engines allow such lean operation by inducing a strong charge stratification, enhancing turbulence generation, and multipoint ignition. Adding a pre-chamber igniter to the engine alters the in-cylinder flow fields as mass is exchanged between the pre-chamber and the main chamber. This study reports the main chamber flow fields of methane fuelled heavy-duty optical engine fitted with a narrow throat active prechamber. Particle image velocimetry (PIV) at 10 Hz is performed from the side view using TiO2 particle seeding. PIV during motoring operation of the engine shows the inflow of main chamber charge into pre-chamber during compression stoke with flow velocities up to 8 m/s (close to the nozzle orifice). PIV measurements obtained by fuelling only the pre-chamber allow for studying the pre-chamber jet's interaction with the main chamber. The prechamber jet exhibits higher than 200 m/s initial velocities. The jet-induced turbulence in the main chamber was visualized, and the movement of the jet-feeding vortex was reported.
AB - In recent years lean-burn technologies have acquired center stage in engine research due to stringent emission norms. Among such technologies, pre-chamber assisted combustion (PCC) has gained much attention for its ability to allow ultra-lean engine operation (λ > 2). The spark-ignited pre-chambers engines allow such lean operation by inducing a strong charge stratification, enhancing turbulence generation, and multipoint ignition. Adding a pre-chamber igniter to the engine alters the in-cylinder flow fields as mass is exchanged between the pre-chamber and the main chamber. This study reports the main chamber flow fields of methane fuelled heavy-duty optical engine fitted with a narrow throat active prechamber. Particle image velocimetry (PIV) at 10 Hz is performed from the side view using TiO2 particle seeding. PIV during motoring operation of the engine shows the inflow of main chamber charge into pre-chamber during compression stoke with flow velocities up to 8 m/s (close to the nozzle orifice). PIV measurements obtained by fuelling only the pre-chamber allow for studying the pre-chamber jet's interaction with the main chamber. The prechamber jet exhibits higher than 200 m/s initial velocities. The jet-induced turbulence in the main chamber was visualized, and the movement of the jet-feeding vortex was reported.
UR - http://hdl.handle.net/10754/681552
UR - https://www.sae.org/content/2022-01-1047/
U2 - 10.4271/2022-01-1047
DO - 10.4271/2022-01-1047
M3 - Conference contribution
BT - SAE Technical Paper Series
PB - SAE International
ER -