Gas dynamics of spark-ignited pre-chamber assisted engine: PIV study

Priybrat Sharma, Ramgopal Sampath, Qinglong Tang, Manuel Alejandro Echeverri Marquez, Emre Cenker, Gaetano Magnotti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


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.
Original languageEnglish (US)
Title of host publicationSAE Technical Paper Series
PublisherSAE International
StatePublished - Aug 30 2022

Bibliographical note

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.

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Pollution
  • Automotive Engineering
  • Industrial and Manufacturing Engineering


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