26 OctMechanical Engineering Graduate SeminarA road toward high efficient modern engines
A road toward high efficient modern engines
  • Sangeeth Sanal, Ph.D. Candidate Supervised by Prof. Hong G Im
  • Monday, October 26, 2020
  • 12:30 PM - 01:00 PM
  • Webinar
2020-10-26T12:302020-10-26T13:00Asia/RiyadhA road toward high efficient modern enginesWebinarEmmanuelle Sougrat

Abstract: 

Modern IC engines are characterized by high efficiency and low emission. These could be achieved by a pre-chamber assisted ultra-lean combustion or by operating SI engines at higher compression ratios. But there are challenges associated with both, which will be addressed in the current work.

Understanding pre-chamber combustion

The current work uses computational fluid dynamics (CFD) to unravel the fundamental understanding of the ignition characteristics of pre-chamber (PC) combustion engines. Despite being around for decades, fundamentals of the underlying physics of pre-chamber combustion engines are relatively unexplored. Under the Fuelcom III consortium, CCRC and Saudi Aramco are working towards understanding the fundamental quantities of PC systems. Preliminary results regarding the ignition mechanism of the main chamber by pre-chamber turbulent jets will be presented.

Unraveling Knock in modern SI engines

Even though knock in SI engine is a familiar topic for many decades; it is rather underexplored due to its stochastic behavior. The unusual knocking cycles are few and far between even in knocking conditions in engines. The main objective of the study is to understand the physics behind knock and use that knowledge to find better-operating conditions for future SI engines. Preliminary results of numerical experiments performed to benchmark the commercial software Converge against the in house DNS solver KARFS will be presented.

Bio:

Sangeeth Sanal, obtained his Bachelor's degree in Mechanical Engineering from the Indian Institute of Technology Hyderabad in 2014. He then joined The University of Tokyo, Japan as a JICA fellow and completed Masters working under the supervision of Prof Yuji Suzuki. During Masters, he worked on elucidating chemical quenching in narrow channels using TALIF. Sangeeth joined the Computational Reacting Flow Lab (CRFL) as a Ph.D. student in 2017 under the supervision of Prof. Hong G Im. 

Registration link to join the Webinar:

https://kaust.zoom.us/webinar/register/WN_0myLFE80SSisbKLzl9tO5w 

MORE INFORMATION

  • Emmanuelle Sougrat
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